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‌SPECIFICATIONS

FASTENER SPECIFICATIONS

ELECTRICAL

Hybrid/EV Controls - Volt

Reusable Threaded Fastener Tightening Specifications

NOTE:

All fasteners listed in this table can be reused after removal.


Application

Specification

Metric (English)

Accessory DC Power Control Module Bolt

22 N.m (16 lb ft)

Accessory DC Power Control Module Nut

22 N.m (16 lb ft)

Battery Positive and Negative Cable Nut (APM Ground Cable)

22 N.m (16 lb ft)

Battery Positive and Negative Cable Nut (B+ APM Module to Battery Fuse Block)

22 N.m (16 lb ft)

SCHEMATIC WIRING DIAGRAMS

HYBRID/EV CONTROLS WIRING SCHEMATICS

Power, Ground and Data Communication

image

Fig. 1: Power, Ground and Data Communication Courtesy of GENERAL MOTORS COMPANY

Manual Drive Mode Select Interface


image

Fig. 2: Manual Drive Mode Select Interface Courtesy of GENERAL MOTORS COMPANY

Drive Motor Monitoring


image

Fig. 3: Drive Motor Monitoring

Courtesy of GENERAL MOTORS COMPANY

Drive Motors and Auxiliary Transmission Fluid Pump Controls

image

Fig. 4: Drive Motors and Auxiliary Transmission Fluid Pump Controls Courtesy of GENERAL MOTORS COMPANY

COMPONENT LOCATOR

HYBRID CONTROLS ELECTRONIC COMPONENT VIEWS

Hybrid Control Electronic Component Views


image


Fig. 5: Hybrid Control Electronic Component Views Courtesy of GENERAL MOTORS COMPANY


Callout

Component Name

1

K1 14 V Power Module

Callout

Component Name

2

High Voltage Battery

3

T6 Power Inverter Module

4

T12 Automatic Transmission Assembly

5

T18 Battery Charger

DIAGNOSTIC INFORMATION AND PROCEDURES

DTC P0335 OR P0336: CRANKSHAFT POSITION SENSOR

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P0335

Crankshaft Position Sensor Circuit

DTC P0336

Crankshaft Position Sensor Performance

Circuit/System Description


The crankshaft position sensor circuits consist of an engine control module (ECM) supplied 5 V reference circuit, low reference circuit, and an output signal circuit. The crankshaft position sensor is a magnetic biased digital output integrated circuit sensing device. The sensor detects magnetic flux changes of invisible magnetic segments on the edge of the crankshaft position reluctor ring mounted on the crankshaft. Each magnetic segment on the ring is spaced at a 60 segment spacing with 2 missing spaces for a reference gap. The crankshaft position sensor produces an ON/OFF DC voltage of varying frequency, with 58 output pulses per crankshaft revolution. The frequency of the crankshaft position sensor output depends on the velocity of the crankshaft. The crankshaft position sensor sends a digital signal, which represents an image of the crankshaft reluctor ring, to the ECM as each segment on the ring rotates past the crankshaft position sensor. The ECM uses each crankshaft position signal pulse to determine crankshaft speed and decodes the crankshaft reluctor ring reference gap to identify crankshaft position. This information is then used to determine the optimum ignition and injection points of the engine. The ECM also uses crankshaft position sensor output information to determine the camshaft relative position to the crankshaft, to control camshaft phasing, and to detect cylinder misfire.

The ECM also generates and sends a replicated signal over a dedicated line to the hybrid/EV powertrain control module 1.

The hybrid/EV powertrain control module 1 uses crankshaft speed and position to confirm internal combustion engine (ICE) status in various modes; for example to confirm Autostart and Autostop functionality. In addition to the signal sent over the dedicated line, this information is also sent from the ECM to the hybrid/EV powertrain control module 1 over serial data. The serial data status will be used by the hybrid/EV powertrain control module 1 in the event of a failure of this circuit.

Conditions for Running the DTC

P0335 or P0336

The vehicle is ON. Conditions for Setting the DTC P0335

No signal from the crank sensor for more than 1.4 seconds.

P0336

The signal from the crank sensor is invalid for more than 1.4 seconds. OR

15 crankshaft sensor resync events occur in less than 10 seconds.

Action Taken When the DTC Sets


DTCs P0335 and P0336 are Type B DTCs.

Conditions for Clearing the DTC


DTCs P0335 and P0336 are Type B DTCs.

Diagnostic Aids


A high resistance ground for either the power inverter module, often referred to as the drive motor generator power inverter module, or the ECM may cause these DTCs to set intermittently. Inspect all grounds for good, secure connections.

Reference Information


Schematic Reference

image Hybrid/EV Controls Schematics image Engine Controls Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Hybrid Modes of Operation Description

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information Special Tools

image EL-35616 Terminal Test Kit

image EL-38522 Variable Signal Generator Equivalent regional tools: Special Tools Circuit/System Verification

1. Engine Running, observe the hybrid/EV powertrain control module Engine Speed parameter with a scan tool.

2. Verify the Engine Speed parameter displays the current engine speed, matching the tachometer and/or the ECM Engine Speed parameter.

image If the hybrid/EV powertrain control module Engine Speed parameter displays a value other than the current engine speed

Refer to Circuit/System Testing.

image If the Engine Speed parameter displays a value matching the current engine speed

3. All OK


Circuit/System Testing


1. Vehicle OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down.

2. Disconnect the X2 harness connector at the K20 ECM.

3. Using the EL 35616 terminal test kit, connect the EL 38522 variable signal generator red lead to the Crankshaft 60X Sensor Signal circuit terminal 42 at the harness. Connect the EL 38522 variable signal generator black lead to ground.

4. Set the EL 38522 variable signal generator SIGNAL to 12 V, FREQUENCY to 30 Hz, and DUTY CYCLE to NORMAL, 50 percent. Plug power cord in to vehicle being tested or another power source.

5. Vehicle ON.


NOTE: With the variable signal generator set at 30 Hz, the Crankshaft Position Resync Counter should cycle from 0 - 255 in 8.5 seconds.


6. Verify with a scan tool the hybrid/EV powertrain control module Crankshaft Position Resync Counter parameter displays a constantly changing value.

image If parameter does not display a constantly changing value

1. Vehicle OFF, disconnect EL 38522 variable signal generator red and black leads, disconnect the X1 harness connector at the T6 power inverter module, vehicle ON.

2. Test for less than 1 V between the signal circuit terminal 29 and ground. image If 1 V or greater, repair the short to voltage on the circuit.

image If less than 1 V

3. Vehicle OFF.

4. Test for infinite resistance between the signal circuit terminal 29 and ground. image If less than infinite resistance, repair the short to ground on the circuit.

image If infinite resistance

5. Test for less than 2 Ω in the signal circuit end to end.

image If 2 Ω or greater, repair the open/high resistance in the circuit. image If less than 2 Ω, replace the T6 power inverter module.

image If parameter displays a constantly changing value

7. Replace the K20 ECM.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification

Refer to Control Module References for engine control module or T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P0506 OR P0507: IDLE SPEED LOW/HIGH

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptors


DTC P0506

Idle Speed Low

DTC P0507

Idle Speed High

Circuit/System Description


The hybrid/EV powertrain control module 1 determines the engine idling speed which varies based on the hybrid/EV battery pack state of charge. The engine control module (ECM) achieves throttle positioning by providing a pulse width modulated voltage to the throttle actuator motor. The throttle blade is spring loaded in both directions, and the default position is slightly open. The hybrid/EV powertrain control module 1 can detect a condition where the engine is cranking but does not start or has stalled, or if the engine speed does not match the commanded speed.

The throttle actuator control (TAC) motor is controlled by the ECM. The DC motor located in the throttle body drives the throttle blade. In order to decrease engine speed, along with spark and fuel delivery changes the ECM commands the throttle closed reducing air flow into the engine and the engine speed decreases. In order to increase engine speed, the ECM commands the throttle plate open allowing more air to pass the throttle plate. If the hybrid/EV powertrain control module 1 detects the actual engine speed is not within a predetermined range of the commanded engine speed, this DTC sets.

Conditions for Running the DTC


P0506

image DTCs P0722, P077B, P0A3F, P0A40, P0A45, P0A46, P0C52, P0C53, P0C57, P0C58, P0C5C, P0C5D, P0C61, P0C62, P1B03, P1B04, P215C are not set.

image The system voltage is greater than 9 volts.

image The accelerator pedal position is valid.

image The accelerator pedal position is less than 1 percent.

image The engine has been running for greater than 60 seconds. image The vehicle speed is less than 2 km/h (1.2 mph).

image The engine coolant temperature (ECT) is 60°C (140°F) or greater. image The commanded engine speed is steady within 50 RPM.

P0507

image The commanded engine speed is steady within 25 RPM. image A scan tool output control is not active.

image DTCs P0506 or P0507 run continuously when the above conditions are met for greater than 10 seconds.


Conditions for Setting the DTC


P0506

The actual engine speed is at least 91 RPM less than the commanded engine speed.

P0507

The actual engine speed is at least 182 RPM greater than the commanded engine speed.

Action Taken When the DTC Sets


DTCs P0506 and P0507 are Type B DTCs.

Conditions for Clearing the DTC


DTCs P0506 and P0507 are Type B DTCs.

Diagnostic Aids


image A stalling condition can cause DTC P0506 to set.

image An intermittent vehicle speed sensor (VSS) signal can cause DTC P0507 to set.


Reference Information


Schematic Reference

Hybrid/EV Controls Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification


1. Verify no other DTCs are set.

image If any other DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

image If no other DTCs are set

2. Verify none of the conditions listed below exist:

P0506

image Excess deposits in the Q38 Throttle Body. Refer to Throttle Body Inspection and Cleaning . image Restricted exhaust

image Mechanical conditions that limit engine speed

image Parasitic load on the engine - For example, a transmission condition, a belt driven accessory condition.

image If a condition exists

Repair as necessary.

image If no condition exists

3. All OK

P0507

image Vacuum leaks

image A throttle valve that does not close correctly

image Verify the correct operation of the crankcase ventilation system. Inspect for the following conditions: image The routing of the positive crankcase ventilation (PCV) system

image Vacuum leaks in the PCV system

image If a condition exists

Repair as necessary.

image If no condition exists

4. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

DTC P0601-P0604, P0606, P062F, P1EB6, OR P1EB7: CONTROL MODULE (HYBRID/EV POWERTRAIN CONTROL MODULE 1)

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptors


DTC P0601

Control Module Read Only Memory Performance

DTC P0602

Control Module Not Programmed

DTC P0603

Control Module Long Term Memory Reset

DTC P0604

Control Module Random Access Memory Performance

DTC P0606

Control Module Processor Performance

DTC P062F

Control Module Long Term Memory Performance

DTC P1EB6

Drive Motor 1 Control Module Long Term Memory Reset

DTC P1EB7

Drive Motor 2 Control Module Long Term Memory Reset

Circuit/System Description


This is an internal fault detection of the hybrid/EV powertrain control module 1 or drive motor control modules. The hybrid/EV powertrain control module 1 and both drive motor control modules are internal to the power inverter module, often referred to as the drive motor generator power inverter module, and not serviced separately. This fault is handled inside the power inverter module, and no external circuits are involved.

Conditions for Running the DTC


image The vehicle is ON.

image The system voltage is greater than 9.5 V.


Conditions for Setting the DTC


The control module has detected an internal malfunction.

Action Taken When the DTC Sets


image DTCs P0601 - P0604, P0606, P061A, P061B, P1EB6, and P1EB7 are Type A DTCs. image DTC P062F is a Type B DTC.

image The hybrid/EV powertrain control module 1 requests the hybrid/EV powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC


image DTCs P0601 - P0604, P0606, P061A, P061B, P1EB6, and P1EB7 are Type A DTCs. image DTC P062F is a Type B DTC.

Reference Information


Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P0562 is not set.

image If the DTC is set

Refer to DTC B1325, B1330, B1517, C0800, C0899, C0900, C12E1, C12E2, P0561-P0563, P1A0C, P1A0D, or P1EFC .

image If the DTC is not set

3. Verify DTC P0601, P0602, P0603, P0604, P0606, P061A, P061B, P062F, P1EB6, or P1EB7 is not set.

image If any of the DTCs are set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

3. All OK

image If none of the DTCs are set

4. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P061A OR P061B: CONTROL MODULE TORQUE SYSTEM

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptors


DTC P061A

Control Module Torque System Circuitry Performance

DTC P061B

Control Module Torque Calculation Performance

Circuit/System Description


The hybrid/EV powertrain control module 1 is responsible for vehicle torque management. To accomplish this, the hybrid/EV powertrain control module 1 constantly monitors all aspects of requested and actual delivered torque from involved controllers. If a torque management fault is detected, propulsion power will be reduced or shut down. The hybrid/EV powertrain control module 1 is internal to the power inverter module, often referred to as the drive motor generator power inverter module, and is not serviced separately. This fault is handled inside the power inverter module and no external circuits are involved.

Conditions for Running the DTC


image The vehicle is ON.

image The system voltage is at least 9.5 V.


Conditions for Setting the DTC


The control module has detected an internal malfunction.

Action Taken When the DTC Sets


image DTCs P061A or P061B are Type A DTCs.

image The hybrid/EV powertrain control module 1 requests the hybrid/EV powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC


DTCs P061A and P061B are Type A DTCs.

Reference Information


Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P0562 is not set.

image If the DTC is set

Refer to DTC B1325, B1330, B1517, C0800, C0899, C0900, C12E1, C12E2, P0561-P0563, P1A0C, P1A0D, or P1EFC .

image If the DTC is not set

3. Verify DTC P061A or P061B is not set.

image If any of the DTCs are set

Replace the T6 Power Inverter Module.

image If none of the DTCs are set

4. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P06AF: TORQUE MANAGEMENT SYSTEM PERFORMANCE - FORCED ENGINE SHUTDOWN

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptor


DTC P06AF

Torque Management System Performance - Forced Engine Shutdown

Circuit/System Description


The hybrid/EV powertrain control module 1 monitors a state of health message that the ECM transmits to verify the ECM is functioning properly. The hybrid/EV powertrain control module 1 is part of the power inverter module, often referred to as the drive motor generator power inverter module, and is not serviced separately.

Conditions for Running the DTC


The system voltage is greater than 9.5 V.

Conditions for Setting the DTC

The hybrid/EV powertrain control module 1 does not detect a valid state of health message from the ECM.

Action Taken When the DTC Sets


image DTC P06AF is a Type A DTC.

image The hybrid/EV powertrain control module 1 requests the hybrid/EV powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC DTC P06AF is a Type A DTC. Reference Information Schematic Reference

image Hybrid/EV Controls Schematics

image Engine Controls Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P0606 is not set.

image If the DTC is set

Refer to DTC P0601-P0604, P0606, P062F, P1EB6, or P1EB7 (Hybrid/EV Powertrain Control Module 1).

image If the DTC is not set

3. Verify DTC P06AF is not set.

image If the DTC is set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

3. Verify the DTC does not set.

image If the DTC sets, continue to Circuit/System Testing. image If the DTC does not set.

4. All OK.

image If the DTC is not set

4. All OK.


Circuit/System Testing


NOTE: Perform Circuit/System Verification before Circuit/System Testing.


1. Vehicle OFF.

2. Disconnect the X1 harness connector at the T6 Power Inverter Module and disconnect the X1 harness at the K20 ECM.

3. Test for less than 2 Ω on the serial data circuits listed below end to end.

image T6 Power Inverter Module X1 connector terminal 33 to K20 ECM X1 connector terminal 8 image T6 Power Inverter Module X1 connector terminal 34 to K20 ECM X1 connector terminal 7 image If 2 Ω or greater

Repair the open/high resistance in the circuit.

image If less than 2 Ω

4. Replace the K20 ECM.

5. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

6. Verify the DTC does not set.

image If the DTC sets

Replace the T6 Power Inverter Module.

image If the DTC does not set

7. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for K20 ECM or T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P06B1, P06B2, P06B4, P06B5, P06E7, OR P06E8: SENSOR SUPPLY VOLTAGE CIRCUIT(S) 1-3 VOLTAGE

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P06B1

Sensor Supply Voltage Circuit 1 Low Voltage

DTC P06B2

Sensor Supply Voltage Circuit 1 High Voltage

DTC P06B4

Sensor Supply Voltage Circuit 2 Low Voltage

DTC P06B5

Sensor Supply Voltage Circuit 2 High Voltage

DTC P06E7

Sensor Supply Voltage Circuit 3 Low Voltage

DTC P06E8

Sensor Supply Voltage Circuit 3 High Voltage

Circuit/System Description


The Hybrid/EV powertrain control module 1 and motor control modules share an internal 15 V reference power supply in order to operate the drive motor sensors processors. This fault is handled inside the power inverter module, often referred to as the drive motor generator power inverter module, and no external circuits are involved. The control modules listed below are part of the power inverter module and are not serviced separately:

image Drive motor 1 control module image Drive motor 2 control module

image Hybrid/EV powertrain control module 1


Conditions for Running the DTC


image The vehicle is ON.

image The system voltage is 8 - 18 V.


Conditions for Setting the DTC


P06B1, P06B4, or P06E7

The reference voltage is less than 12 V for 1 s.

P06B2, P06B5, or P06E8

The reference voltage is greater than 22 V for 1 s.

Actions Taken When the DTC Sets

image DTCs P06B1, P06B2, P06B4, P06B5, P06E7, and P06E8 are Type A DTCs.

image The power inverter module requests the hybrid/EV powertrain control module 2 to open the high voltage contactor relays.


Actions Taken When the DTC Sets


DTCs P06B1, P06B2, P06B4, P06B5, P06E7, and P06E8 are Type A DTCs.

Diagnostic Aids


This DTC may set due to low 12 V system voltage.

Reference Information


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P06B1, P06B2, P06B4, P06B5, P06E7, or P06E8 is not set.

image If any of the DTCs are set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

3. All OK

image If none of the DTCs are set

3. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P0A1B OR P0A1C: DRIVE MOTOR 1-2 CONTROL MODULE PERFORMANCE

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptors


DTC P0A1B

Drive Motor 1 Control Module Performance

DTC P0A1C

Drive Motor 2 Control Module Performance

Circuit/System Description


The power inverter module is often referred to as the drive motor generator power inverter module. This is a fault detection of the power inverter module's internal motor control modules. This fault is handled inside the power inverter module; no external circuits are involved. The motor control modules are part of the power inverter module and are not serviced separately.

Conditions for Running the DTC


image The vehicle is ON.

image The system voltage is greater than 9.5 V.


Conditions for Setting the DTC


The control module has detected an internal malfunction.

Action Taken When the DTC Sets


image DTCs P0A1B and P0A1C are Type A DTCs.

image The power inverter module requests the hybrid powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC


DTCs P0A1B and P0A1C are Type A DTCs.

Reference Information


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P0A1B or P0A1C is not set.

image If any of the DTCs are set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

3. All OK

image If none of the DTCs are set

3. All OK

Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P0A3F, P0A40, P0C52, P0C53, P0C5C, P0C5D, OR P1B03: DRIVE MOTOR 1 POSITION SENSOR

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptors


DTC P0A3F

Drive Motor 1 Position Sensor Circuit

DTC P0A40

Drive Motor 1 Position Sensor Performance

DTC P0C52

Drive Motor 1 Position Sensor Circuit 1 Low Voltage

DTC P0C53

Drive Motor 1 Position Sensor Circuit 1 High Voltage

DTC P0C5C

Drive Motor 1 Position Sensor Circuit 2 Low Voltage

DTC P0C5D

Drive Motor 1 Position Sensor Circuit 2 High Voltage

DTC P1B03

Drive Motor 1 Position Sensor Circuit Tracking Lost

Diagnostic Fault Information



Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Excitation Reference Circuit*

P0A3F

P0A3F

P0A3F

P0A40, P1B03

COS Signal* - Circuit

P0A3F, P0C52

P0A3F

P0A3F, P0C53

P0A40, P1B03

SIN Signal* - Circuit

P0A3F, P0C5C

P0A3F

P0A3F, P0C5D

P0A40, P1B03

*Represents a differential circuit consisting of a pair of wires. See Circuit/System Description and schematic for detailed description.


Circuit/System Description

The drive motor position sensor is monitored by the motor control module. The motor control module monitors the angular position, speed and direction of the drive motor rotor based upon the signals of the resolver-type position sensor. The position sensor contains a drive coil, two driven coils, and an irregular shaped metallic rotor. The metallic rotor is mechanically attached to the shaft of the drive motor. At vehicle ON, the motor control module outputs a 7 V AC, 10 kHz excitation signal to the drive coil. The drive coil excitation signal creates a magnetic field surrounding the two driven coils and the irregular shaped rotor. The motor control module then monitors the two driven coil circuits for return signals, often referred to as Sine and Cosine waveforms, abbreviated SIN and COS. The position of the irregular metallic rotor causes the magnetically-induced return signals of the driven coils to vary in size and shape. A comparison of the two driven coil signals allows the motor control module to determine the exact position, speed and direction of the drive motor rotor. The drive motor 1 position sensor is serviceable separately from the drive motor assembly.

Conditions for Running the DTC


The vehicle is ON. Conditions for Setting the DTC P0C52, P0C5C

Circuit voltage is less than 0.5 V.

P0C53, P0C5D

Circuit voltage is greater than 4.5 V.

P0A3F

SIN or COS signal is less than 2.3 V. The motor control module cannot determine the motor position based upon the sensor signals.

P0A40

SIN or COS signal is greater than 4 V. The motor control module detects a degraded motor position sensor signal.

P1B03

The motor control module is unable to track the motor position based upon the sensor signals.

Action Taken When the DTC Sets


P0A3F, P0A40, P1B03

image DTCs P0A3F, P0A40, and P1B03 are Type A DTCs.

image Vehicle propulsion will be disabled.

P0C52, P0C53, P0C5C, P0C5D

DTCs P0C52, P0C53, P0C5C, and P0C5D are Type B DTCs.

Conditions for Clearing the DTC


image DTCs P0A3F, P0A40, and P1B03 are Type A DTCs.

image DTCs P0C52, P0C53, P0C5C, and P0C5D are Type B DTCs.


Diagnostic Aids

The drive motor position sensor circuits operate at very low current. These circuits are susceptible to moisture intrusion, corrosion, and terminal damage. Extreme care must be taken when probing terminals and manipulating harnesses. Poor terminal connections can result in intermittent operation.

In the case of intermittent concerns, clearing DTC information and returning the vehicle to the customer without a repair is not appropriate. Contact technical assistance when the cause of an intermittent concern cannot be identified.

Reference Information


Schematic Reference

Hybrid/EV Controls Schematics

Connector End View Reference

image COMPONENT CONNECTOR END VIEWS - INDEX

image INLINE HARNESS CONNECTOR END VIEWS - INDEX

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information Special Tools

DT-44152 Jumper Harness

For equivalent regional tools, refer to Special Tools.

Circuit/System Testing


WARNING: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure will perform the following tasks: image Identify how to disable high voltage.

image Identify how to test for the presence of high voltage.

image Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

Failure to follow the procedures exactly as written may result in serious injury

or death.


NOTE: If the position sensor or wiring harness circuits fail the circuit tests, replace the component; do not repair.


1. Disable High Voltage, refer to High Voltage Disabling .

2. Remove the Drive Motor Power Inverter Module Cover, refer to Drive Motor Power Inverter Module Cover Replacement .

3. Vehicle OFF, disconnect the X4 harness connector at the T6 Power Inverter Module.

4. Test for greater than 10,000 Ω between the terminals listed below and ground: image Excitation Reference circuit terminal 9 X4

image Excitation Reference circuit terminal 10 X4 image SIN Signal circuit terminal 5 X4

image SIN Signal circuit terminal 6 X4 image COS Signal circuit terminal 7 X4 image COS Signal circuit terminal 8 X4 image If less than 10,000 Ω

1. Remove the transmission, refer to Transmission Replacement .

2. Disconnect the connector at the B228B Drive Motor 1 Position Sensor, refer to Drive Motor Removal - 1st Position .

3. Test for less than 10,000 Ω between the appropriate harness terminal and ground. image If less than 10,000 Ω, replace the transmission wiring harness assembly.

image If greater than 10,000 Ω, replace the B228B Drive Motor 1 Position Sensor.

image If greater than 10,000 Ω

5. Test for 4.0 - 25 Ω between the terminals listed below:

image Excitation Reference circuit terminal 10 and Reference circuit terminal 9 image COS Signal circuit 1 terminal 7 and Signal circuit 1 terminal 8

image SIN Signal circuit 2 terminal 5 and Signal circuit 2 terminal 6

image If not within the specified range

1. Disconnect the connector at the B228B Drive Motor 1 Position Sensor.

2. Test for 4.0 - 25 Ω between the connector terminals listed below:

image Excitation Reference circuit terminal 3 and Excitation Reference circuit terminal 4 image COS Signal circuit terminal 1 and COS Signal circuit terminal 2

image SIN Signal circuit terminal 5 and SIN Signal circuit terminal 6

image If within the specified range, replace the transmission wiring harness assembly.

image If not within the specified range, replace the B228B Drive Motor 1 Position Sensor.

image If within the specified range

6. Replace the T6 Power Inverter Module.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

image Refer to Drive Motor Power Inverter Module Cover Replacement

image Refer to Drive Motor Disassemble - 1st Position for B228A Drive Motor 1 Position Sensor replacement

image Refer to Automatic Transmission Wiring Harness Replacement

image Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming and setup

DTC P0A45, P0A46, P0C57, P0C58, P0C61, P0C62, OR P1B04: DRIVE MOTOR 2 POSITION SENSOR

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptors


DTC P0A45

Drive Motor 2 Position Sensor Circuit

DTC P0A46

Drive Motor 2 Position Sensor Performance

DTC P0C57

Drive Motor 2 Position Sensor Circuit 1 Low Voltage

DTC P0C58

Drive Motor 2 Position Sensor Circuit 1 High Voltage

DTC P0C61

Drive Motor 2 Position Sensor Circuit 2 Low Voltage

DTC P0C62

Drive Motor 2 Position Sensor Circuit 2 High Voltage

DTC P1B04

Drive Motor 2 Position Sensor Circuit Tracking Lost

Diagnostic Fault Information



Circuit

Short to Ground

Open/High Resistance

Short to Voltage


Signal Performance

Excitation Reference*

P0A45

P0A45

P0A45

P0A46, P1B04

COS Signal* - Circuit

P0A45, P0C57

P0A45

P0A45, P0C58

P0A46, P1B04

SIN Signal* - Circuit

P0A45, P0C61

P0A45

P0A45, P0C62

P0A46, P1B04

*Represents a differential circuit consisting of a pair of wires. See Circuit/System Description and schematic for detailed description.


Circuit/System Description

The drive motor position sensor is monitored by the motor control module. The motor control module monitors the angular position, speed and direction of the drive motor rotor based upon the signals of the resolver-type position sensor. The position sensor contains a drive coil, two driven coils and an irregular shaped metallic rotor. The metallic rotor is mechanically attached to the shaft of the drive motor. At vehicle ON, the motor control module outputs a 7 V AC, 10 kHz excitation signal to the drive coil. The drive coil excitation signal creates a magnetic field surrounding the two driven coils and the irregular shaped rotor. The motor control module then monitors the two driven coil circuits for return signals, often referred to as Sine and Cosine waveforms, abbreviated SIN and COS. The position of the irregular metallic rotor causes the magnetically-induced return signals of the driven coils to vary in size and shape. A comparison of the two driven coils signals allows the motor control module to determine the exact position, speed and direction of the drive motor rotor. The drive motor 2 position sensor is serviceable separately from the drive motor assembly.

Conditions for Running the DTC


The vehicle is ON. Conditions for Setting the DTC P0C57 or P0C61

Circuit voltage is less than 0.5 V.

P0C58 or P0C62

Circuit voltage is greater than 4.5 V.

P0A45

SIN or COS signal is less than 2.3 V. The motor control module cannot determine the motor position based upon the sensor signals.

P0A46

SIN or COS signal is greater than 4 V. The motor control module detects a degraded motor position sensor signal.

P1B04

The motor control module is unable to track the motor position based upon the sensor signals.

Action Taken When the DTC Sets


P0A45, P0A46, P1B04

image DTCs P0A45, P0A46, and P1B04 are Type A DTCs.

image Vehicle propulsion will be disabled.

P0C57, P0C58, P0C61, P0C62

DTCs P0C57, P0C58, P0C61, and P0C62 are Type B DTCs.

Conditions for Clearing the DTC


image DTCs P0A45, P0A46, and P1B04 are Type A DTCs.

image DTCs P0C57, P0C58, P0C61, and P0C62 are Type B DTCs.


Diagnostic Aids

The drive motor position sensor circuits operate at very low current. These circuits are susceptible to moisture intrusion, corrosion, and terminal damage. Extreme care must be taken when probing terminals and manipulating harnesses. Poor terminal connections can result in intermittent operation.

In the case of intermittent concerns, clearing DTC information and returning the vehicle to the customer without a repair is not appropriate. Contact technical assistance when the cause of an intermittent concern cannot be identified.

Reference Information


Schematic Reference

Hybrid/EV Controls Schematics

Connector End View Reference

image COMPONENT CONNECTOR END VIEWS - INDEX

image INLINE HARNESS CONNECTOR END VIEWS - INDEX

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing


WARNING: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure will perform the following tasks: image Identify how to disable high voltage.

image Identify how to test for the presence of high voltage.

image Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

Failure to follow the procedures exactly as written may result in serious injury or death.


NOTE: If the position sensor or wiring harness circuits fail the circuit tests, replace the component; do not repair.


1. Disable High Voltage, refer to High Voltage Disabling .

2. Remove the Drive Motor Power Inverter Module Cover, refer to Drive Motor Power Inverter Module Cover Replacement .

3. Vehicle OFF, disconnect the X5 harness connector at the T6 Power Inverter Module.

4. Test for greater than 10,000 Ω between the terminals listed below and ground: image Excitation Reference circuit terminal 9 X5

image Excitation Reference circuit terminal 10 X5 image SIN Signal circuit terminal 5 X5

image SIN Signal circuit terminal 6 X5 image COS Signal circuit terminal 7 X5 image COS Signal circuit terminal 8 X5 image If less than 10,000 Ω

1. Remove the transmission, refer to Transmission Replacement .

2. Disconnect the connector at the B228B Drive Motor 2 Position Sensor, refer to Drive Motor Removal - 2nd Position .

3. Test for less than 10,000 Ω between the appropriate harness terminal and ground. image If less than 10,000 Ω, replace the transmission wiring harness assembly.

image If greater than 10,000 Ω, replace the B228B Drive Motor 2 Position Sensor.

image If greater than 10,000 Ω

5. Test for 4.0 - 25 Ω between the terminals listed below:

image Excitation Reference circuit terminal 10 and Reference circuit terminal 9 image COS Signal circuit 1 terminal 7 and Signal circuit 1 terminal 8

image SIN Signal circuit 2 terminal 5 and Signal circuit 2 terminal 6

image If not within the specified range

1. Disconnect the connector at the B228B Drive Motor 2 Position Sensor.

2. Test for 4.0 - 25 Ω between the connector terminals listed below:

image Excitation Reference circuit terminal 3 and Excitation Reference circuit terminal 4 image COS Signal circuit terminal 1 and COS Signal circuit terminal 2

image SIN Signal circuit terminal 5 and SIN Signal circuit terminal 6

image If within the specified range, replace the transmission wiring harness assembly.

image If not within the specified range, replace the B228B Drive Motor 2 Position Sensor.

image If within the specified range

6. Replace the T6 Power Inverter Module.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

image Refer to Drive Motor Power Inverter Module Cover Replacement

image Refer to Drive Motor Disassemble - 2nd Position for B228B Drive Motor 2 Position Sensor replacement image Refer to Automatic Transmission Wiring Harness Replacement

image Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P0A5E, P0A61, P0A64, P0A67, P0A6A, OR P0A6D: DRIVE MOTOR 1-2 PHASE U, V OR W LOW CURRENT

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptors


DTC P0A5E

Drive Motor 1 Phase U Low Current

DTC P0A61

Drive Motor 1 Phase V Low Current

DTC P0A64

Drive Motor 1 Phase W Low Current

DTC P0A67

Drive Motor 2 Phase U Low Current

DTC P0A6A

Drive Motor 2 Phase V Low Current

DTC P0A6D

Drive Motor 2 Phase W Low Current

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains the motor control modules and the hybrid/EV powertrain control module 1. Each motor control module operates its respective drive motor based upon hybrid/EV powertrain control module 1 commands. Each motor control module controls the speed, direction and output torque of its respective drive motor through the sequencing actuation of high current switching transistors called insulated gate bipolar transistors. Each drive motor operates utilizing 3-phase alternating current (AC) electricity. Each insulated gate bipolar transistor operates a single phase of the drive motor. Each phase is individually identified as U, V and W. Each motor control module monitors the current of each phase in order to detect power inverter module fault conditions.

Conditions for Running the DTC


The vehicle is ON.

Conditions for Setting the DTC


One or more phase currents are less than 1.0 A.

Action Taken When the DTC Sets


DTCs P0A5E, P0A61, P0A64, P0A67, P0A6A, and P0A6D are Type A DTCs.

Conditions for Clearing the DTC

DTCs P0A5E, P0A61, P0A64, P0A67, P0A6A, and P0A6D are Type A DTCs.

Reference Information


Schematic Reference

Hybrid/EV Controls Schematics

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P0A5E, P0A61, P0A64, P0A67, P0A6A, and P0A6D is not set.

image If any of the DTCs are set

1. Clear the DTC, vehicle OFF for 2 minutes to allow all control modules to shut down.

2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

3. Verify the DTC does not set.

image If the DTC sets, continue to Circuit/System Testing. image If the DTC does not set

4. All OK.

image If none of the DTCs are set

3. All OK.


Circuit/System Testing


WARNING: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure will perform the following tasks: image Identify how to disable high voltage.

image Identify how to test for the presence of high voltage.

image Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

Failure to follow the procedures exactly as written may result in serious injury or death.

NOTE: Perform Circuit/System Verification before Circuit/System Testing.


1. Perform the High Voltage Disabling procedure for servicing the T6 Power Inverter Module or T12 Transmission.

2. Remove the T6 Power Inverter Module. Refer to Drive Motor Generator Power Inverter Module Replacement .

3. Test for infinite resistance between each of the AC circuit terminals listed below and ground for each phase of the appropriate M15 Drive Motor:

Drive Motor 1

image Terminal 3 phase U image Terminal 2 phase V image Terminal 1 phase W

Drive Motor 2

image Terminal 3 phase U image Terminal 2 phase V image Terminal 1 phase W

image If less than infinite resistance

Replace the M15 Drive Motor.

image If infinite resistance for all AC circuits

4. Test for less than 1 Ω between the AC circuit terminals listed below: image Terminal 3 phase U to terminal 2 phase V

image Terminal 3 phase U to terminal 1 phase W image Terminal 2 phase V to terminal 1 phase W image If 1 Ω or greater

Replace the M15 Drive Motor.

image If less than 1 Ω

5. Verify the DTC does not set.

image If the DTC sets

1. Perform each of the operations listed below one at a time until the fault is corrected. image Replace the T6 Power Inverter Module.

image Replace the M15 Drive Motor.

2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

3. Repeat the DTC check.

image If the DTC does not set

6. All OK.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

image Refer to Drive Motor Removal - 1st Position for Drive Motor 1 replacement image Refer to Drive Motor Removal - 2nd Position for Drive Motor 2 replacement

image Refer to Control Module References for Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P0A78 OR P0A79: DRIVE MOTOR 1-2 INVERTER PERFORMANCE

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P0A78

Drive Motor 1 Inverter Performance

DTC P0A79

Drive Motor 2 Inverter Performance

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains the motor control modules and the hybrid/EV powertrain control module 1. Each motor control module operates its respective drive motor based upon hybrid/EV powertrain control module 1 commands. Each motor control module controls the speed, direction and output torque of its respective drive motor through the sequencing actuation of high current switching transistors called insulated gate bipolar transistors. Each drive motor operates utilizing 3-phase alternating current (AC) electricity. Each insulated gate bipolar transistor operates a single phase of the drive motor. Each phase is individually identified as U, V and W. Each motor control module monitors the current of each phase in order to detect power inverter module over current conditions.

Conditions for Running the DTC


The high voltage contactor relays are closed.

Conditions for Setting the DTC


The motor control module detects excessive current flow through the switched portion of the insulated gate bipolar transistor.

Actions Taken When the DTC Sets


image DTCs P0A78 and P0A79 are Type A DTCs.

image The power inverter module requests hybrid/EV powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC


DTCs P0A78 and P0A79 are Type A DTCs.

Reference Information

Schematic Reference

Hybrid/EV Controls Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P0A78 or P0A79 is not set.

image If any of the DTCs are set

1. Clear the DTC, vehicle OFF for 2 minutes to allow all control modules to shut down.

2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

3. Verify the DTC does not set.

image If the DTC sets, continue to Circuit/System Testing. image If the DTC does not set.

4. All OK

image If none of the DTCs are set

3. All OK


Circuit/System Testing


NOTE: Perform Circuit/System Verification before Circuit/System Testing.


WARNING: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure will perform the following tasks: image Identify how to disable high voltage.

image Identify how to test for the presence of high voltage.

image Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

Failure to follow the procedures exactly as written may result in serious injury

or death.


1. Perform the High Voltage Disabling procedure for servicing the T6 Power Inverter Module or T12 Transmission.

2. Remove the T6 Power Inverter Module. Refer to Drive Motor Generator Power Inverter Module Replacement .

3. Test for infinite resistance between each of the AC circuit terminals listed below and ground for each phase of the appropriate M15 Drive Motor:

Drive Motor 1

image Terminal 3 phase U image Terminal 2 phase V image Terminal 1 phase W

Drive Motor 2

image Terminal 3 phase U image Terminal 2 phase V image Terminal 1 phase W

image If less than infinite resistance

Replace the M15 Drive Motor.

image If infinite resistance for all AC circuits

1. Perform each of the operations listed below one at a time until the fault is corrected.

1. Replace the T6 Power Inverter Module.

2. Replace the M15 Drive Motor.

2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

3. Repeat the DTC check.

image If the DTC does not set

4. All OK.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

image Refer to Drive Motor Removal - 1st Position for Drive Motor 1 replacement image Refer to Drive Motor Removal - 2nd Position for Drive Motor 2 replacement

image Refer to Control Module References for Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P0AB9: HYBRID/EV SYSTEM PERFORMANCE

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P0AB9

Hybrid/EV System Performance

Circuit/System Description


This vehicle does not use a 12 V starter motor to crank the internal combustion engine. A much more powerful 300 V motor located within the transmission is utilized to crank the engine. This motor, drive motor 1, can rotate the engine to operating speed within just a few hundred milliseconds. The hybrid/EV powertrain control module 1 can detect a condition where the engine is cranking but does not start or has stalled.

Conditions for Running the DTC


Drive motor 1 is cranking the engine.

Conditions for Setting the DTC


The hybrid/EV powertrain control module 1 detects that crankshaft position sensor engine speed has not risen above the commanded cranking speed indicating the engine has failed to start, or the hybrid/EV powertrain control module 1 detects crankshaft position sensor engine speed has fallen below a specific minimum speed indicating the engine has stalled.

Actions Taken When the DTC Sets DTC P0AB9 is a Type A DTC. Cranks But Does Not Start

When system commands engine Crank, the hybrid/EV powertrain control module 1 will command drive motor 1 to

rotate the engine. The drive motor will continue to rotate the engine at a specific RPM until the engine starts and causes increased engine RPM. The hybrid/EV powertrain control module 1 will cease engine rotation if an increase in engine RPM is not observed after several seconds. This function may have the appearance of a start/stall condition.

image Commanded engine torque is greater than 20 N.m (15 lb ft) image Low fuel level condition not set

image Fuel level sensors DTCs not set

image Engine CMP or CKP sensor DTCs not set image DTC P16E0 not set

Engine Stall

If a stall occurs after a successful engine start, the hybrid/EV powertrain control module 1 will recognize the drop in engine RPM and command drive motor 1 to maintain engine RPM in an attempt to restart the engine. Drive motor 1 will continue to rotate the engine until the hybrid/EV powertrain control module 1 commands it to stop. The engine may be rotated for many minutes after the actual engine stall condition occurred and is typically stopped only after the hybrid/EV battery state of charge gets too low. This function may have the appearance of a running engine.

image Engine is running

image Low fuel level condition not set image Fuel level sensors DTCs not set

image Engine CMP or CKP sensor DTCs not set image DTC P16E0 not set

Conditions for Clearing the DTC DTC P0AB9 is a Type A DTC. Diagnostic Aids

Any condition that causes the engine to stall and/or not start may set this DTC. Possible conditions include:

image Fuel conditions such as low level, low pressure, or contamination image Engine conditions such as low compression

image Restricted exhaust or air intake systems image Loose or disconnected grounds

Always inspect for DTCs that would cause an engine stall and/or no start condition. This DTC may set if the vehicle is powered off while driving.

Circuit/System Verification


1. Vehicle ON. Operate the hood release to open the hood. Under normal operation, the engine should start and run.

2. Verify the engine starts and runs for at least 20 seconds.

image If the engine fails to start and run for at least 20 seconds

Diagnose the engine and transmission systems. Perform Line Pressure Check. Refer to Line Pressure Check .

image If the engine starts and runs for at least 20 seconds

3. Verify DTC P0AB9 is not set.

image If the DTC is set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

3. All OK

image If the DTC is not set

4. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P0AEE, P0AEF, P0AF0, P0AF3-P0AF5, P0BD2-P0BD4, P0BD7-P0BD9, P0BDC-P0BDE, OR P0BE1- P0BE3: DRIVE MOTOR INVERTER TEMPERATURE SENSOR(S) 1-6

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P0AEE

Drive Motor Inverter Temperature Sensor 1 Performance

DTC P0AEF

Drive Motor Inverter Temperature Sensor 1 Circuit Low Voltage

DTC P0AF0

Drive Motor Inverter Temperature Sensor 1 Circuit High Voltage

DTC P0AF3

Drive Motor Inverter Temperature Sensor 2 Performance

DTC P0AF4

Drive Motor Inverter Temperature Sensor 2 Circuit Low Voltage

DTC P0AF5

Drive Motor Inverter Temperature Sensor 2 Circuit High Voltage

DTC P0BD2

Drive Motor Inverter Temperature Sensor 3 Performance

DTC P0BD3

Drive Motor Inverter Temperature Sensor 3 Circuit Low Voltage

DTC P0BD4

Drive Motor Inverter Temperature Sensor 3 Circuit High Voltage

DTC P0BD7

Drive Motor Inverter Temperature Sensor 4 Performance

DTC P0BD8

Drive Motor Inverter Temperature Sensor 4 Circuit Low Voltage

DTC P0BD9

Drive Motor Inverter Temperature Sensor 4 Circuit High Voltage

DTC P0BDC

Drive Motor Inverter Temperature Sensor 5 Performance

DTC P0BDD

Drive Motor Inverter Temperature Sensor 5 Circuit Low Voltage

DTC P0BDE

Drive Motor Inverter Temperature Sensor 5 Circuit High Voltage

DTC P0BE1

Drive Motor Inverter Temperature Sensor 6 Performance

DTC P0BE2

Drive Motor Inverter Temperature Sensor 6 Circuit Low Voltage

DTC P0BE3

Drive Motor Inverter Temperature Sensor 6 Circuit High Voltage

Circuit/System Description


This is an internal fault detection of the power inverter module, often referred to as the drive motor generator power inverter module. This fault is handled inside the power inverter module, and no external circuits are involved.

Conditions for Running the DTC


P0AEE, P0AF3, P0BD2, P0BD7, P0BDC, and P0BE1

image Vehicle ON after the vehicle has been OFF for 6 hours.

image Temperature average of the inverter phase temperature sensors is greater than -20°C (-4°F).

image DTCs P0AEF, P0AF0, P0AF4, P0AF5, P0BD3, P0BD4, P0BD8, P0BD9, P0BDD, P0BDE, P0BE2, and

P0BE3 are not set.

P0AEF, P0AF4, P0BD3, P0BD8, P0BDD, and P0BE2

The vehicle is ON.

P0AF0, P0AF5, P0BD4, P0BD9, P0BDE, and P0BE3

image The vehicle is ON.

image Inverter warmup time is 90 s or greater.


Conditions for Setting the DTC


P0AEE, P0AF3, P0BD2, P0BD7, P0BDC, and P0BE1

A 20°C (36°F) difference is observed between the individual inverter phase temperature sensor and the average of the power electronics coolant and transmission fluid temperatures, at vehicle ON after a cold soak.

P0AEF, P0AF4, P0BD3, P0BD8, P0BDD, and P0BE2

The inverter phase temperature sensor is greater than 170°C (338°F) for 3 s.

P0AF0, P0AF5, P0BD4, P0BD9, P0BDE, and P0BE3

The inverter phase temperature sensor is less than -50°C (-58°F) for 2.6 s.

Actions Taken When the DTC Sets


DTCs P0AEE, P0AEF, P0AF0, P0AF3, P0AF4, P0AF5, P0BD2, P0BD3, P0BD4, P0BD7, P0BD8, P0BD9, P0BDC, P0BDD, P0BDE, P0BE1, P0BE2 and P0BE3 are Type B DTCs.

Conditions for Clearing the DTC


DTCs P0AEE, P0AEF, P0AF0, P0AF3, P0AF4, P0AF5, P0BD2, P0BD3, P0BD4, P0BD7, P0BD8, P0BD9, P0BDC, P0BDD, P0BDE, P0BE1, P0BE2 and P0BE3 are Type B DTCs.

Reference Information


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P0AEE, P0AEF, P0AF0, P0AF3, P0AF4, P0AF5, P0BD2, P0BD3, P0BD4, P0BD7, P0BD8, P0BD9, P0BDC, P0BDD, P0BDE, P0BE1, P0BE2, or P0BE3 is not set.

image If any of the DTCs are set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

3. All OK.

image If none of the DTCs are set

3. All OK.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module replacement, programming, and setup

DTC P0B01, P0B04, OR P0B07: AUXILIARY TRANSMISSION FLUID PUMP LOW CURRENT

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptors


DTC P0B01

Auxiliary Transmission Fluid Pump Low Current

DTC P0B04

Auxiliary Transmission Fluid Pump Low Current

DTC P0B07

Auxiliary Transmission Fluid Pump Low Current

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains two motor control modules and the hybrid/EV powertrain control module 1. The motor control modules operate their respective drive motor based upon power inverter module commands. The hybrid/EV powertrain control module 1 controls the auxiliary transmission fluid pump. The pump motor utilizes 3 phase AC electricity. The motor stator coil is comprised of three phase circuits. The phase circuits are identified as phase U, phase V, and phase W. The U-V-W phase circuits are connected in a wye configuration. This means each phase is connected at a single, central point.

The motor control modules monitor a current sensor connected to each motor phase. The current sensor is part of the power inverter module assembly and is not serviced separately. The hybrid/EV powertrain control module 1 is part of the power inverter module and is not serviced separately.

Conditions for Running the DTC


Vehicle is ON.

Conditions for Setting the DTC


One or more phase currents are less than 1 A.

Action Taken When the DTC Sets


image DTCs P0B01, P0B04, and P0B07 are Type A DTCs.

image Vehicle propulsion will be disabled.


Conditions for Clearing the DTC


DTCs P0B01, P0B04, and P0B07 are Type A DTCs.

Reference Information


Schematic Reference

Hybrid/EV Controls Schematics

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Testing


WARNING: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure will perform the following tasks: image Identify how to disable high voltage.

image Identify how to test for the presence of high voltage.

image Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

Failure to follow the procedures exactly as written may result in serious injury or death.


1. Perform the High Voltage Disabling procedure for servicing the T6 Power Inverter Module or T12 Transmission.

2. Remove the T6 Power Inverter Module cover. Refer to Drive Motor Power Inverter Module Cover Replacement .

3. Disconnect the G5 transmission fluid pump high voltage AC 3 phase circuit harness connector at the rear of the T6 Power Inverter Module.

4. Test for infinite resistance between each of the AC circuit terminals listed below and ground for each phase of the G5 Transmission Fluid Pump - Electric/Auxiliary:

image Terminal 3 phase U image Terminal 2 phase V image Terminal 1 phase W

image If less than infinite resistance

Replace the G5 Transmission Fluid Pump - Electric/Auxiliary.

image If infinite resistance

5. With the pump at 25°C (77°F), test for 2.4 - 2.8 Ω between the AC circuit terminals listed below: image Terminal 3 phase U to terminal 2 phase V

image Terminal 3 phase U to terminal 1 phase W image Terminal 2 phase V to terminal 1 phase W image If not within the specified range

Replace the G5 Transmission Fluid Pump - Electric/Auxiliary.

image If within the specified range

6. Replace the T6 Power Inverter Module.

Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

image Refer to Automatic Transmission Fluid Pump and Fluid Filter Removal for G5 Transmission Fluid Pump - Electric/Auxiliary, often referred to as the A/Trans Fluid Pump Motor, replacement

image Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P0BE6-P0BE8, P0BEA-P0BEC, P0BEE, P0BEF, P0BF0, P0BF2-P0BF4, P0BF6-P0BF8, OR P0BFA- P0BFC: DRIVE MOTOR 1-2 PHASE U, V OR W CURRENT SENSOR(S)

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptors


DTC P0BE6

Drive Motor 1 Phase U Current Sensor Performance

DTC P0BE7

Drive Motor 1 Phase U Current Sensor Circuit Low Voltage

DTC P0BE8

Drive Motor 1 Phase U Current Sensor Circuit High Voltage

DTC P0BEA

Drive Motor 1 Phase V Current Sensor Performance

DTC P0BEB

Drive Motor 1 Phase V Current Sensor Circuit Low Voltage

DTC P0BEC

Drive Motor 1 Phase V Current Sensor Circuit High Voltage

DTC P0BEE

Drive Motor 1 Phase W Current Sensor Performance

DTC P0BEF

Drive Motor 1 Phase W Current Sensor Circuit Low Voltage

DTC P0BF0

Drive Motor 1 Phase W Current Sensor Circuit High Voltage

DTC P0BF2

Drive Motor 2 Phase U Current Sensor Performance

DTC P0BF3

Drive Motor 2 Phase U Current Sensor Circuit Low Voltage

DTC P0BF4

Drive Motor 2 Phase U Current Sensor Circuit High Voltage

DTC P0BF6

Drive Motor 2 Phase V Current Sensor Performance

DTC P0BF7

Drive Motor 2 Phase V Current Sensor Circuit Low Voltage

DTC P0BF8

Drive Motor 2 Phase V Current Sensor Circuit High Voltage

DTC P0BFA

Drive Motor 2 Phase W Current Sensor Performance

DTC P0BFB

Drive Motor 2 Phase W Current Sensor Circuit Low Voltage

DTC P0BFC

Drive Motor 2 Phase W Current Sensor Circuit High Voltage

Circuit/System Description


This is an internal fault detection of the power inverter module, often referred to as the drive motor generator power inverter module. This fault is handled inside the drive motor generator power inverter module and no external circuits are involved.

Conditions for Running the DTC


The control module runs the program to detect an internal fault when the Hybrid wake-up circuit is active.

Conditions for Setting the DTC


The control module has detected an internal malfunction.

Action Taken When the DTC Sets


image DTCs P0BE6, P0BE7, P0BE8, P0BEA, P0BEB, P0BEC, P0BEE, P0BEF, P0BF0, P0BF2, P0BF3, P0BF4, P0BF6, P0BF7, P0BF8, P0BFA, P0BFB and P0BFC are Type A DTCs.

image The power inverter module requests the hybrid powertrain control module 2 to open the high voltage contactor relays.

Conditions for Clearing the DTC


DTCs P0BE6, P0BE7, P0BE8, P0BEA, P0BEB, P0BEC, P0BEE, P0BEF, P0BF0, P0BF2, P0BF3, P0BF4, P0BF6, P0BF7, P0BF8, P0BFA, P0BFB and P0BFC are Type A DTCs.

Reference Information


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P0BE6, P0BE7, P0BE8, P0BEA, P0BEB, P0BEC, P0BEE, P0BEF, P0BF0, P0BF2, P0BF3, P0BF4, P0BF6, P0BF7, P0BF8, P0BFA, P0BFB or P0BFC is not set.

image If any of the DTCs are set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

3. All OK

image If none of the DTCs are set

3. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P0BFD OR P0BFE: DRIVE MOTOR 1-2 PHASES U-V-W NOT PLAUSIBLE

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P0BFD

Drive Motor 1 Phases U-V-W Not Plausible

DTC P0BFE

Drive Motor 2 Phases U-V-W Not Plausible

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains the motor control modules and the hybrid/EV powertrain control module 1. Each motor control module operates its respective drive motor based upon hybrid/EV powertrain control module 1 commands. Each motor control module controls the speed, direction and output torque of its respective drive motor through the sequencing actuation of high current switching transistors called insulated gate bipolar transistors. Each drive motor operates utilizing 3-phase alternating current (AC) electricity. Each insulated gate bipolar transistor operates a single phase of the drive motor. Each phase is individually identified as U, V and W. Each motor control module monitors the current of each phase in order to detect power inverter module over current conditions.

Because all the motor generator phase circuits are electrically joined together, they should each flow about the same amount of current. The motor control modules perform a mathematical calculation to verify that the phase current sensors are accurate. If the U-V-W phase current sensors indicate about the same amount of phase current, the sum of the calculation should be near zero. If the U-V-W phase currents are not similar, this DTC will set.

Conditions for Running the DTC


image The vehicle is ON.

image The high voltage contactor relays are closed.


Conditions for Setting the DTC


The sum of the 3 phase current sensors is 110 A or greater.

Actions Taken When the DTC Sets


image DTCs P0BFD and P0BFE are Type A DTCs.

image The power inverter module requests the hybrid/EV powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC


DTCs P0BFD and P0BFE are Type A DTCs.

Reference Information


Schematic Reference

Hybrid/EV Controls Schematics

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P0BFD or P0BFE is not set.

image If any of the DTCs are set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

3. Verify the DTC does not set.

image If the DTC sets, continue to Circuit/System Testing. image If the DTC does not set.

4. All OK.

image If none of the DTCs are set

3. All OK.


Circuit/System Testing


NOTE: Perform Circuit/System Verification before Circuit/System Testing.


WARNING: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure will perform the following tasks: image Identify how to disable high voltage.

image Identify how to test for the presence of high voltage.

image Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

Failure to follow the procedures exactly as written may result in serious injury or death.


1. Perform the High Voltage Disabling procedure for servicing the T6 Power Inverter Module cable connections.

2. Remove the T6 Power Inverter Module. Refer to Drive Motor Generator Power Inverter Module Replacement .

3. Test for infinite resistance between each of the AC circuit terminals listed below and ground for each phase of the appropriate M15 Drive Motor:

Drive Motor 1

image Terminal 1B phase U image Terminal 1A phase V image Terminal 1C phase W

Drive Motor 2

image Terminal 2B phase U

image Terminal 2A phase V image Terminal 2C phase W

image If less than infinite resistance

Replace the M15 Drive Motor.

image If infinite resistance for all AC circuits

4. Perform each of the operations listed below one at a time until the fault is corrected.

1. Replace the T6 Power Inverter Module.

2. Replace the M15 Drive Motor.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

image Refer to Drive Motor Removal - 1st Position for Drive Motor 1 replacement image Refer to Drive Motor Removal - 2nd Position for Drive Motor 2 replacement

image Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P0C01 OR P0C04: DRIVE MOTOR 1-2 HIGH CURRENT

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P0C01

Drive Motor 1 High Current

DTC P0C04

Drive Motor 2 High Current

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains the motor control modules and the hybrid/EV powertrain control module 1. Each motor control module operates its respective drive motor based upon hybrid/EV powertrain control module 1 commands. Each motor control module controls the speed, direction and output torque of its respective drive motor through the sequencing actuation of high current switching transistors called insulated gate bipolar transistors. Each drive motor operates utilizing 3-phase alternating current (AC) electricity. Each insulated gate bipolar transistor operates a single phase of the drive motor. Each phase is individually identified as U, V and W. Each motor control module monitors the current of each phase in order to detect power inverter module over current conditions.

Conditions for Running the DTC


The hybrid wakeup circuit is active.

Conditions for Setting the DTC


One or more phase currents are greater than 600 A.

Actions Taken When the DTC Sets


image DTCs P0C01 and P0C04 are Type A DTCs.

image The power inverter module requests the hybrid/EV powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC


DTCs P0C01 and P0C04 are Type A DTCs.

Reference Information


Schematic Reference

Hybrid/EV Controls Schematics

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P0C01 or P0C04 is not set.

image If any of the DTCs are set

1. Clear the DTC, vehicle OFF for 2 minutes to allow all control modules to shut down.

2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

3. Verify the DTC does not set.

image If the DTC sets, continue to Circuit/System Testing. image If the DTC does not set.

4. All OK

image If none of the DTCs are set

3. All OK


Circuit/System Testing


WARNING: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure will perform the following tasks:

image Identify how to disable high voltage.

image Identify how to test for the presence of high voltage.

image Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

Failure to follow the procedures exactly as written may result in serious injury or death.


NOTE: Perform Circuit/System Verification before Circuit/System Testing.


1. Perform the High Voltage Disabling procedure for servicing the T6 Power Inverter Module or T12 Transmission.

2. Remove the T6 Power Inverter Module. Refer to Drive Motor Generator Power Inverter Module Replacement .

3. Test for infinite resistance between each of the AC circuit terminals listed below and ground for each phase of the appropriate M15 Drive Motor:

Drive Motor 1

image Terminal 3 phase U image Terminal 2 phase V image Terminal 1 phase W

Drive Motor 2

image Terminal 3 phase U image Terminal 2 phase V image Terminal 1 phase W

image If less than infinite resistance

Replace the M15 Drive Motor.

image If infinite resistance for all AC circuits

4. Verify the DTC does not set.

image If the DTC sets

1. Perform each of the operations listed below one at a time until the fault is corrected.

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration

2. Replace the T6 Power Inverter Module.

3. Replace the M15 Drive Motor.

2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

3. Repeat the DTC check.

image If the DTC does not set

5. All OK.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

image Refer to Drive Motor Removal - 1st Position for Drive Motor 1 replacement image Refer to Drive Motor Removal - 2nd Position for Drive Motor 2 replacement

image Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P0C0B OR P0C0E: DRIVE MOTOR 1-2 INVERTER SUPPLY VOLTAGE CIRCUIT

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P0C0B

Drive Motor 1 Inverter Supply Voltage Circuit

DTC P0C0E

Drive Motor 2 Inverter Supply Voltage Circuit

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains the motor control modules and the hybrid/EV powertrain control module 1. Each motor control module operates its respective drive motor based upon hybrid/EV powertrain control module 1 commands. Each motor control module controls the speed, direction and output torque of its respective drive motor through the sequencing actuation of high current switching transistors called insulated gate bipolar transistors. Each drive motor operates utilizing 3-phase alternating current (AC) electricity. Each insulated gate bipolar transistor operates a single phase of the drive motor. Each phase is individually identified as U, V and W. Each motor control module monitors the current of each phase in order to detect power inverter module over current conditions.

Conditions for Running the DTC


image Vehicle is ON or Charge Mode is active. image High voltage is greater than 100 V.

Conditions for Setting the DTC


The control module does not detect voltage at the insulated gate bi-polar transistor bias supply.

Actions Taken When the DTC Sets


image DTCs P0C0B and P0C0E are Type A DTCs. image Propulsion will be disabled.

Conditions for Clearing the DTC


DTCs P0C0B and P0C0E are Type A DTCs.

Reference Information


Schematic Reference

Hybrid/EV Controls Schematics

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P0C0B or P0C0E is not set.

image If any of the DTCs are set

1. Clear the DTC, vehicle OFF for 2 minutes to allow all control modules to shut down.

2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

3. Verify the DTC does not set.

image If the DTC sets, continue to Circuit/System Testing. image If the DTC does not set.

4. All OK

image If none of the DTCs are set

3. All OK


Circuit/System Testing


NOTE: Perform Circuit/System Verification before Circuit/System Testing.


WARNING: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure will perform the following tasks: image Identify how to disable high voltage.

image Identify how to test for the presence of high voltage.

image Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

Failure to follow the procedures exactly as written may result in serious injury or death.


1. Perform the High Voltage Disabling procedure for servicing the T6 Power Inverter Module cable connections.

2. Remove the T6 Power Inverter Module. Refer to Drive Motor Generator Power Inverter Module Replacement .

3. Test for infinite resistance between each of the AC circuit terminals listed below and ground for each phase of the appropriate M15 Drive Motor:

Drive Motor 1

image Terminal 3 phase U image Terminal 2 phase V image Terminal 1 phase W

Drive Motor 2

image Terminal 3 phase U image Terminal 2 phase V image Terminal 1 phase W

image If less than infinite resistance

Replace the M15 Drive Motor.

image If infinite resistance for all AC circuits

4. Verify the DTC does not set.

image If the DTC sets

1. Perform each of the operations listed below one at a time until the fault is corrected.

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration

2. Replace the T6 Power Inverter Module.

3. Replace the applicable M15 Drive Motor.

2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

3. Repeat the DTC check.

image If the DTC does not set

5. All OK.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

image Refer to Drive Motor Removal - 1st Position for M15A Drive Motor 1 replacement image Refer to Drive Motor Removal - 2nd Position for M15B Drive Motor 2 replacement

image Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P0C11-P0C16: DRIVE MOTOR 1-2 INVERTER PHASE U, V OR W HIGH TEMPERATURE

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptor


DTC P0C11

Drive Motor 1 Inverter Phase U High Temperature

DTC P0C12

Drive Motor 1 Inverter Phase V High Temperature

DTC P0C13

Drive Motor 1 Inverter Phase W High Temperature

DTC P0C14

Drive Motor 2 Inverter Phase U High Temperature

DTC P0C15

Drive Motor 2 Inverter Phase V High Temperature

DTC P0C16

Drive Motor 2 Inverter Phase W High Temperature

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains two drive motor control modules and the hybrid/EV powertrain control module 1. Each motor control module operates its respective drive motor based upon hybrid/EV powertrain control module 1 commands. Each motor control module controls the speed, direction and output torque of its respective drive motor through the sequencing actuation of high current switching transistors called insulated gate bipolar transistors. Each drive motor operates utilizing 3 phase AC. Each insulated gate bipolar transistor operates a single phase of the drive motor. Each phase is individually identified as U, V and W. Each motor control module monitors the temperature of each phase in order to detect power inverter module over-temperature conditions.

Conditions for Running the DTC


P0C11 - P0C16

Vehicle ON.

Conditions for Setting the DTC


The phase temperature has exceeded 131°C (268°F) for 5 seconds.

Action Taken When the DTC Sets

image DTCs P0C11, P0C12, P0C13, P0C14, P0C15 and P0C16 are Type A DTCs.

image The power inverter module requests the hybrid/EV powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC


DTCs P0C11, P0C12, P0C13, P0C14, P0C15 and P0C16 are Type A DTCs.

Reference Information


Description and Operation

image Drive Motor Power Inverter Module Description and Operation image Hybrid/EV Cooling System Description and Operation

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON, observe the scan tool ECM Engine Coolant Temperature (ECT) parameter in freeze frame data.

2. Verify the Engine Coolant Temperature parameter was below 125°C (257°F) when the DTC set.

image If the ECT was 125°C (257°F) or greater when the DTC set

Refer to Symptoms - Engine Cooling and correct that concern first.

image If the ECT was below 125°C (257°F) when the DTC set

3. Inspect for proper coolant level in the hybrid cooling system reservoir.

image If coolant level is low

Refer to Hybrid Cooling System Loss of Coolant (Power Electronics) Hybrid Cooling System Loss of Coolant (Battery) .

image If coolant level is OK

4. Inspect the hybrid/EV cooling system radiator for debris or obstruction.

image If a concern is found

Repair or replace the restricted or damaged components as necessary.

image If no concern is found

5. Inspect for proper operation of all hybrid/EV system coolant pumps. Refer Hybrid/EV Electronics Cooling Diagnostic .

image If a concern is found

Repair or replace the coolant pumps as necessary.

image If no concern is found

6. Command the cooling fans through all operating speeds.

image If the cooling fans do not operate in all speeds

Refer to Hybrid/EV Electronics Cooling Diagnostic .

image If the cooling fans operate in all speeds

7. All OK.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P0C17, P0C18, P1B0F, OR P1B10: DRIVE MOTOR 1-2 POSITION NOT LEARNED/LEARN INCORRECT

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P0C17

Drive Motor 1 Position Not Learned

DTC P0C18

Drive Motor 2 Position Not Learned

DTC P1B0F

Drive Motor 1 Position Learn Incorrect

DTC P1B10

Drive Motor 2 Position Learn Incorrect

Circuit/System Description


The drive motor position sensor is monitored by the drive motor control module. The motor control module monitors the angular position, speed and direction of the drive motor rotor based upon the signals of the resolver-type position sensor. The position sensor contains a drive coil, two driven coils and an irregular shaped metallic rotor. The metallic rotor is mechanically attached to the shaft of the drive motor generator. At vehicle ON, the motor control module outputs a 7 V AC, 10 kHz excitation signal to the drive coil. The drive coil excitation signal creates a magnetic field surrounding the two driven coils and the irregular shaped rotor. The motor control module then monitors the two driven coil circuits for a return signal. The position of the irregular metallic rotor causes the magnetically-induced return signals of the driven coils to vary in size and shape. A comparison of the two driven coils signals allows the motor control module to determine the exact position, speed and direction of the drive motor rotor.

A measurement called offset is needed for accurate determination of the motor position. Offset is the relationship between the position sensor and the drive motor generator output shaft. Whenever the vehicle is cycled to OFF, the motor control module attempts to learn the offset of the drive motor position sensor by rapidly oscillating the motor and observing the position sensor signals.

The motor control module will attempt to learn the position at vehicle OFF. The non-learned condition would

normally occur only after a motor control module reprogramming event. The control modules listed below are part of the power inverter module, often referred to as the drive motor generator power inverter module, and are not serviced separately:

image Auxiliary transmission fluid pump control module image Drive motor 1 control module

image Drive motor 2 control module

image Hybrid/EV powertrain control module 1


Conditions for Running the DTC


P0C17, P0C18

image Vehicle is cycled from ON to OFF.

image The motor control module has no valid drive motor position sensor offset value in memory.

P1B0F, P1B10

image Vehicle is cycled from ON to OFF.

image The motor control module has learned a valid drive motor position sensor offset value at least once.


Conditions for Setting the DTC


Condition 1

Position sensor offset value not learned because drive motor speed is greater than 50 RPM.

Condition 2

Position sensor offset value not learned because hybrid battery voltage as observed at the motor control module is less than 200 V.

Condition 3

image Position sensor offset value not learned because drive motor phase to phase current difference is less than 30 A.

image P1B0F or P1B10 failed to learn for 15 consecutive key cycle learn attempts.


Actions Taken When the DTC Sets


P0C17, P0C18

DTCs P0C17 and P0C18 are Type A DTCs.

P1B0F, P1B10

image DTCs P1B0F and P1B10 are Type B DTCs.

image The motor control module operates the drive motor generator using the last valid learned offset.


Conditions for Clearing the DTC


image DTCs P0C17 and P0C18 are Type A DTCs. image DTCs P1B0F and P1B10 are Type B DTCs.

Diagnostic Aids

image If the vehicle is powered off while driving, DTC P1B0F or P1B10 may set.

image The drive motor position sensor circuits operate at very low current. These circuits are susceptible to moisture intrusion, corrosion, and terminal damage. Extreme care must be taken when probing terminals and manipulating harnesses. Poor terminal connections can result in intermittent operation.

image Intermittent appearance of DTC P0A3F, P0A40, P0C52, P0C53, P0C5C, P0C5D, or P1B03 for drive motor 1 or DTC P0A45, P0A46, P0C57, P0C58, P0C61, P0C62, or P1B04 for drive motor 2 suggests intermittent position sensor circuit or connector problems.


Reference Information


Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification


1. Vehicle ON.

2. Verify that DTCs P0A3F, P0A40, P0A45, P0A46, P0A78, P0A79, P0C01, P0C04, P0C0B, P0C0E, P0C4E, P0C4F, P0C52, P0C53, P0C57, P0C58, P0C5C, P0C5D, P0C61, P0C62, P1B03, P1B04, P1B0D, or P1B0E is

not set.

image If any of the DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

image If none of the DTCs are set


NOTE: When turning vehicle OFF, open and close the driver door and wait 2 minutes to allow all modules to shut down.


3. Cycle vehicle power 4 times, using a scan tool to monitor the state of the appropriate Drive Motor Position Sensor Offset Learn Status.

image If Drive Motor Position Sensor Offset Learn Status showed Motor Current Incorrect all 4 cycles

Refer to Circuit/System Testing.

image If Drive Motor Position Sensor Offset Learn Status did not show Motor Current Incorrect all 4 cycles

4. Vehicle ON.

5. Verify DTC P0C17, P0C18, P1B0F, or P1B10 is not set.

image If any of the DTCs are set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Cycle vehicle power 4 times, using a scan tool to monitor the state of the appropriate Drive Motor Position Sensor Offset Learn Status.

3. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set

4. All OK.

image If none of the DTCs are set

6. All OK.


Circuit/System Testing


NOTE: You must perform the Circuit/System Verification before proceeding with Circuit/System Testing


WARNING: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure will perform the following tasks: image Identify how to disable high voltage.

image Identify how to test for the presence of high voltage.

image Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

Failure to follow the procedures exactly as written may result in serious injury or death.


1. Perform the High Voltage Disabling procedure for servicing the T6 Power Inverter Module or T12 Transmission.

2. Remove the T6 Power Inverter Module. Refer to Drive Motor Generator Power Inverter Module Replacement .

3. Test for infinite resistance between each of the AC circuit terminals listed below and ground for each phase of the appropriate M15 Drive Motor:

Drive Motor 1

image Terminal 1B phase U image Terminal 1A phase V image Terminal 1C phase W

Drive Motor 2

image Terminal 2B phase U image Terminal 2A phase V image Terminal 2C phase W

image If less than infinite resistance

Replace the M15 Drive Motor.

image If infinite resistance for all AC circuits

4. Verify the DTC does not set.

image If the DTC sets

1. Perform each of the operations listed below one at a time until the fault is corrected.

1. Replace the T6 Power Inverter Module.

2. Replace the appropriate M15 Drive Motor.

2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

3. Repeat the DTC check.

image If the DTC does not set

5. All OK.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

image Refer to Drive Motor Removal - 1st Position for K107A Drive Motor 1 replacement image Refer to Drive Motor Removal - 2nd Position for K107B Drive Motor 2 replacement

image Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup.

DTC P0C19: DRIVE MOTOR 1 TORQUE DELIVERED PERFORMANCE

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P0C19

Drive Motor 1 Torque Delivered Performance

Circuit/System Description


Each drive motor is controlled by a motor control module. The motor control module constantly monitors the requested torque and the delivered torque of its respective drive motor. The motor control module is part of the power inverter module, often referred to as the drive motor generator power inverter module, and is not serviced separately.

Conditions for Running the DTC


image DTCs P0A3F, P0A40, P1AF5, P0BFD, P1B03, P1B0C or P16EB is not set.

image Vehicle ON.

image Drive motor 1 is commanded to develop torque.


Conditions for Setting the DTC


The motor control module has detected that difference between drive motor delivered and commanded torque is greater than 123 N.m (91 lb ft).

Actions Taken When the DTC Sets


image DTC P0C19 is a Type A DTC.

image The hybrid/EV powertrain control module 1 requests the hybrid/EV powertrain control module 2 to open the high voltage contactor relays.

Conditions for Clearing the DTC DTC P0C19 is a Type A DTC. Diagnostic Aids

Because the engine and drive motor 1 are mechanically connected through a planetary gear set, an engine condition that requires drive motor 1 to consume excessive current while trying to rotate the engine may cause this DTC to set such as:

image Extreme braking during regeneration may cause this DTC to be set in history. image Seized or binding engine

image Seized or binding accessory drive belt


Reference Information


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON. Operate the hood release to open the hood. The engine should start and run.

2. Verify the engine is not seized or binding.

image If the engine is seized or binding

Refer to Symptoms - Engine Mechanical .

image If the engine is not seized or binding

3. Verify DTC P0C19 is not set.

image If the DTC is set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

3. All OK

image If the DTC is not set

4. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup.

DTC P0C1A: DRIVE MOTOR 2 TORQUE DELIVERED PERFORMANCE

Diagnostic Instructions

image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P0C1A

Drive Motor 2 Torque Delivered Performance

Circuit/System Description


Each drive motor is controlled by a motor control module. The motor control module constantly monitors the requested torque and the delivered torque of its respective drive motor. The motor control module is part of the power inverter module, often referred to as the drive motor generator power inverter module, and is not serviced separately.

Conditions for Running the DTC


image Vehicle ON.

image DTCs P0A3F, P0A40, P1AF5, P0BFD, P1B03, P1B0C, P1B41, or P16EB is not set.

image Drive motor 2 is commanded to develop torque.


Conditions for Setting the DTC


The motor control module has detected that difference between drive motor delivered and commanded torque is greater than 132 N.m (97 lb ft).

Actions Taken When the DTC Sets


image DTC P0C1A is a Type A DTC.

image The hybrid/EV powertrain control module 1 requests the hybrid/EV powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC DTC P0C1A is a Type A DTC. Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P0C1A is not set.

image If the DTC is set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

3. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

4. All OK

image If the DTC is not set

3. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P0C28: AUXILIARY TRANSMISSION FLUID PUMP HIGH CURRENT

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P0C28

Auxiliary Transmission Fluid Pump High Current

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains two motor control modules and the hybrid/EV powertrain control module 1. The motor control modules operate their respective drive motor based upon power inverter module commands. The hybrid/EV powertrain control module 1 controls the auxiliary transmission fluid pump. The motors utilize 3 phase AC electricity. The motor stator coil is comprised of three phase circuits. The phase circuits are identified as phase U, phase V, and phase W. The U-V-W phase circuits are connected in a wye configuration. This means each phase is connected at a single, central point. The motor control modules monitor a current sensor connected to each motor phase. The current sensor is part of the motor assembly and is not serviced separately. The hybrid/EV powertrain control module 1 is part of the power inverter module and are not serviced separately.

Conditions for Running the DTC


Vehicle is ON.

Conditions for Setting the DTC


One or more phase currents are greater than 35 A.

Actions Taken When the DTC Sets


image DTC P0C28 is a Type A DTC.

image Vehicle propulsion will be disabled.


Conditions for Clearing the DTC DTC P0C28 is a Type A DTC. Reference Information Schematic Reference

Hybrid/EV Controls Schematics

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Testing


WARNING: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure will perform the following tasks: image Identify how to disable high voltage.

image Identify how to test for the presence of high voltage.

image Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

Failure to follow the procedures exactly as written may result in serious injury or death.


1. Perform the High Voltage Disabling procedure for servicing the T6 Power Inverter Module or T12 Transmission.

2. Disconnect the X8 harness connector at the T6 Power Inverter Module.

3. Test for infinite resistance between each of the AC circuit terminals listed below and ground for each phase of the G5 Transmission Fluid Pump - Electric/Auxiliary:

image Terminal 3 phase U image Terminal 2 phase V image Terminal 1 phase W

image If less than infinite resistance

Replace the G5 Transmission Fluid Pump - Electric/Auxiliary.

image If infinite resistance

4. Replace the T6 Power Inverter Module.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

image Refer to Automatic Transmission Fluid Pump and Fluid Filter Removal for G5 Transmission Fluid Pump - Electric/Auxiliary replacement

image Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P0C4E: DRIVE MOTOR 1 POSITION EXCEEDED LEARNING LIMIT

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P0C4E

Drive Motor 1 Position Exceeded Learning Limit

Circuit/System Description


The drive motor position sensor is monitored by the drive motor control module. The motor control module monitors the angular position, speed and direction of the drive motor rotor based upon the signals of the resolver-type position sensor. The position sensor contains a drive coil, two driven coils and an irregular shaped metallic rotor. The metallic rotor is mechanically attached to the shaft of the drive motor generator. At vehicle ON, the motor control module outputs a 7 V AC, 10 kHz excitation signal to the drive coil. The drive coil excitation signal creates a magnetic field surrounding the two driven coils and the irregular shaped rotor. The motor control module then monitors the two driven coil circuits for a return signal. The position of the irregular metallic rotor causes the magnetically-induced return signals of the driven coils to vary in size and shape. A comparison of the two driven coils signals allows the motor control module to determine the exact position, speed and direction of the drive motor rotor.

A measurement called offset is needed for accurate determination of the motor position. Offset is the relationship between the position sensor and the drive motor generator output shaft. Whenever the vehicle is cycled to OFF, the motor control module attempts to learn the offset of the drive motor position sensor by rapidly oscillating the motor and observing the position sensor signals.

The control modules listed below are part of the power inverter module, often referred to as the drive motor generator power inverter module, and are not serviced separately:

image Auxiliary transmission fluid pump control module image Drive motor 1 control module

image Drive motor 2 control module

image Hybrid/EV powertrain control module 1


Conditions for Running the DTC


image The vehicle is cycled OFF.

image Offset Learn has completed.


Conditions for Setting the DTC


image The position sensor total offset exceeds 30 degrees during the learning process. OR

image The current learned value differs from the previous learned value by greater than 10 degrees.


Actions Taken When the DTC Sets DTC P0C4E is a Type A DTC. Conditions for Clearing the DTC DTC P0C4E is a Type A DTC. Diagnostic Aids

This DTC sets when the drive motor control module is unable to learn the position of the drive motor. When this DTC sets, or after replacement of a drive motor position sensor, drive motor, or power inverter module, it is possible that a special wide angle learn needs to occur. This wide angle learn occurs when the drive motor control module sees a programming event on the High Speed GMLAN bus.

For intermittent appearance of DTCs:

image The drive motor position sensor circuits operate at very low current. These circuits are susceptible to moisture intrusion, corrosion, and terminal damage. Extreme care must be taken when probing terminals and manipulating harnesses. Poor terminal connections can result in intermittent operation.

image If the customer comments that the problem occurs only during moist environmental conditions: rain, snow, vehicle wash, etc., inspect the sensor wiring for signs of water intrusion.

image Intermittent appearance of DTC P0A3F, P0A40, P0C52, P0C53, P0C5C, P0C5D, or P1B03 suggests intermittent position sensor circuit or connector problems.

image Drive motor control modules 1 and 2 monitor and report their respective Drive Motor Position Sensor Offset Learn Status. This information can be observed using a scan tool. Status is updated during the transition from vehicle ON to vehicle OFF during normal conditions. Alternating, and possibly intermittent, appearance of "Not Run," "Learn Failed Motor Speed Not Zero," and "Motor Current Incorrect" suggests intermittent position sensor circuit or connector problems.

Drive Motor 1/2 Position Sensor Offset Learn Status Parameter Descriptions

Drive Motor Position Sensor Offset Learn Status


Description


May Be Caused By


Not Run

Not run yet, waiting for key off

Not Applicable

Aborted run due to detecting high voltage too low or motor speed too high

Key off while rolling, drive motor position sensor circuit problems, or high voltage system problems

Ran but failed due to out of range values

Resolver or drive motor problems

Learn Successful

Position offset learned and stored successfully

Not Applicable

Learn Failed Motor Speed Not Zero

Speed high during offset learn but not before

Drive motor position sensor circuit problems

Drive Motor Position Sensor Offset Learn Status


Description


May Be Caused By

Learn Failed - High Voltage Too Low

High voltage contactors opened during offset learn

High voltage system problems


Motor Current Incorrect

Low current on 3-phase circuits between power inverter module and drive motor

Drive motor or power inverter module


Reference Information


Schematic Reference

Hybrid/EV Controls Schematics

Connector End View Reference

image COMPONENT CONNECTOR END VIEWS - INDEX

image INLINE HARNESS CONNECTOR END VIEWS - INDEX

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P0A3F, P0A40, P0C52, P0C53, P0C5C, P0C5D, or P1B03 is not set.

image If any of the DTCs are set

Refer to DTC P0A3F, P0A40, P0C52, P0C53, P0C5C, P0C5D, or P1B03.

image If none of the DTCs are set

3. Verify DTC P0C4E is not set.

image If the DTC sets


NOTE: A current DTC indicates that the Motor Control Module cannot learn the motor position. Programming any module on the High Speed GMLAN bus will initiate a Motor Control Module wide angle learn. If current T6 Power Inverter Module software is already up-to-date, then programming will not take place and the wide angle learn will not be initiated. Program a different module, such as the ECM, to initiate the wide angle learn. If necessary, the majority of modules can be forced to reprogram using the SPS Replace and Program option.


1. Perform each of the operations listed below one at a time until the fault is corrected.

1. Program the T6 Power Inverter Module or another High Speed GMLAN module if software is already up-to-date.


NOTE: Check for physical damage on the position sensor and drive motor

rotor and replace any damaged component first.


2. Replace the B228A Drive Motor 1 Position Sensor, and if the DTC still sets, program a module to initiate wide angle learn.

3. Replace the M15A Drive Motor 1, and if the DTC still sets, program a module to initiate wide angle learn.

4. Replace and program the T6 Power Inverter Module.

2. Repeat the DTC check in step 3.

image If the DTC does not set

4. All OK.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

image Refer to Drive Motor Disassemble - 1st Position for B228A Drive Motor 1 Position Sensor, often referred to as the Generator Position Sensor Stator (Unit A), replacement

image Refer to Drive Motor Removal - 1st Position , and Drive Motor Installation - 1st Position for Drive Motor 1 replacement

image Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P0C4F: DRIVE MOTOR 2 POSITION EXCEEDED LEARNING LIMIT

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P0C4F

Drive Motor 2 Position Exceeded Learning Limit

Circuit/System Description


The drive motor position sensor is monitored by the drive motor control module. The motor control module monitors the angular position, speed and direction of the drive motor rotor based upon the signals of the resolver-type position sensor. The position sensor contains a drive coil, two driven coils and an irregular shaped metallic rotor. The metallic rotor is mechanically attached to the shaft of the drive motor generator. At vehicle ON, the motor control module outputs a 7 V AC, 10 kHz excitation signal to the drive coil. The drive coil excitation signal creates a magnetic field surrounding the two driven coils and the irregular shaped rotor. The motor control module then monitors the two driven coil circuits for a return signal. The position of the irregular metallic rotor causes the magnetically-induced return signals of the driven coils to vary in size and shape. A comparison of the two driven coils signals allows the motor control module to determine the exact position, speed and direction of the drive motor rotor.

A measurement called offset is needed for accurate determination of the motor position. Offset is the relationship between the position sensor and the drive motor generator output shaft. Whenever the vehicle is cycled to OFF, the motor control module attempts to learn the offset of the drive motor position sensor by rapidly oscillating the motor and observing the position sensor signals.

The control modules listed below are part of the power inverter module, often referred to as the drive motor generator power inverter module, and are not serviced separately:

image Auxiliary transmission fluid pump control module image Drive motor 1 control module

image Drive motor 2 control module

image Hybrid/EV powertrain control module 1


Conditions for Running the DTC


image The vehicle is cycled OFF. image Offset learn has completed.

Conditions for Setting the DTC


image The position sensor offset total exceeds 30 degrees during the learning process. OR

image The current learned value differs from the previous learned value by greater than 10 degrees.


Actions Taken When the DTC Sets DTC P0C4F is a Type A DTC. Conditions for Clearing the DTC DTC P0C4F is a Type A DTC. Diagnostic Aids

This DTC sets when the drive motor control module is unable to learn the position of the drive motor. When this DTC sets, or after replacement of a drive motor position sensor, drive motor, or power inverter module, it is possible that a special wide angle learn needs to occur. This wide angle learn occurs when the drive motor control module sees a programming event on the High Speed GMLAN bus.

For intermittent appearance of DTCs:

image The drive motor position sensor circuits operate at very low current. These circuits are susceptible to moisture intrusion, corrosion, and terminal damage. Extreme care must be taken when probing terminals and manipulating harnesses. Poor terminal connections can result in intermittent operation.

image If the customer comments that the problem occurs only during moist environmental conditions: rain, snow, vehicle wash, etc., inspect the sensor wiring for signs of water intrusion.

image Intermittent appearance of DTC P0A45, P0A46, P0C57, P0C58, P0C61, P0C62, or P1B04 suggests intermittent position sensor circuit or connector problems.

image Drive motor control modules 1 and 2 monitor and report their respective Drive Motor Position Sensor Offset Learn Status. This information can be observed using a scan tool. Status is updated during the transition from vehicle ON to vehicle OFF during normal conditions. Alternating or intermittent display of "Not Run," "Learn Failed Motor Speed Not Zero," and "Motor Current Incorrect" suggests intermittent position sensor circuit or connector problems.

Drive Motor 1/2 Position Sensor Offset Learn Status Parameter Descriptions

Drive Motor Position Sensor Offset Learn Status


Description


May Be Caused By

Drive Motor Position Sensor Offset Learn Status


Description


May Be Caused By


Not Run

Not run yet, waiting for key off

Not Applicable

Aborted run due to detecting high voltage too low or motor speed too high

Key off while rolling, drive motor position sensor circuit problems, or high voltage system problems

Ran but failed due to out of range values

Resolver or drive motor problems

Learn Successful

Position offset learned and stored successfully

Not Applicable

Learn Failed Motor Speed Not Zero

Speed high during offset learn but not before

Drive motor position sensor circuit problems

Learn Failed - High Voltage Too Low

High voltage contactors opened during offset learn

High voltage system problems


Motor Current Incorrect

Low current on 3-phase circuits between power inverter module and drive motor

Drive motor or power inverter module


Reference Information


Schematic Reference

Hybrid/EV Controls Schematics

Connector End View Reference

image COMPONENT CONNECTOR END VIEWS - INDEX

image INLINE HARNESS CONNECTOR END VIEWS - INDEX

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P0A45, P0A46, P0C57, P0C58, P0C61, P0C62, or P1B04 is not set.

image If any of the DTCs are set

Refer to DTC P0A45, P0A46, P0C57, P0C58, P0C61, P0C62, or P1B04.

image If none of the DTCs are set

3. Verify DTC P0C4F is not set.

image If the DTC sets


NOTE: A current DTC indicates that the Motor Control Module cannot learn the motor position. Programming any module on the High Speed GMLAN bus will initiate a Motor Control Module wide angle learn. If current T6 Power

Inverter Module software is already up-to-date, then programming will not take place and the wide angle learn will not be initiated. Program a different module, such as the ECM, to initiate the wide angle learn. If necessary, the majority of modules can be forced to reprogram using the SPS Replace and Program option.


1. Perform each of the operations listed below one at a time until the fault is corrected.

1. Program the T6 Power Inverter Module or another High Speed GMLAN module if software is already up-to-date.


NOTE: Check for physical damage on the position sensor and drive motor rotor and replace any damaged component first.


2. Replace the B228B Drive Motor 2 Position Sensor, and if the DTC still sets, program a module to initiate wide angle learn.

3. Replace the M15B Drive Motor 2, and if the DTC still sets, program a module to initiate wide angle learn.

4. Replace and program the T6 Power Inverter Module.

2. Repeat the DTC check in step 3.

image If the DTC does not set

4. All OK.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

image Refer to Drive Motor Disassemble - 2nd Position for B228B Drive Motor 2 Position Sensor replacement image Refer to Drive Motor Removal - 2nd Position , and Drive Motor Installation - 2nd Position for Drive

Motor 2 replacement

image Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P0C76: HYBRID/EV BATTERY SYSTEM HIGH VOLTAGE PRESENT

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P0C76

Hybrid/EV Battery System High Voltage Present

Circuit/System Description


The hybrid/EV battery pack contains 4 high voltage contactors and 1 solid state relay (transistor). The high voltage contactors allow the high voltage DC to be connected to the vehicle or safely contained within the hybrid/EV battery pack. The 4 high voltage contactors are a main positive high voltage contactor, main negative high voltage contactor,

charge positive high voltage contactor, and a precharge negative high voltage contactor. The transistor controls the battery heater high voltage positive circuit.

Conditions for Running the DTC


image High voltage contactors are commanded open. image The system voltage is at least 10 V.

Conditions for Setting the DTC


The high voltage bus voltage is greater than 200 V 3.5 seconds after the contactors have been commanded open.

Action Taken When the DTC Sets DTC P0C76 is a Type A DTC. Conditions for Clearing the DTC

image DTC P0C76 is a Type A DTC.

image The Clear Secured High Voltage DTCs reset function must be performed to prevent resetting the DTC.


Reference Information


Schematic Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Verify the contactors are operating normally.

image If the contactors are not operating properly

Repair as necessary.

image If the contactors are operating properly

2. Vehicle ON.

3. With a scan tool, perform the Clear Secured High Voltage DTCs reset function.

4. Verify DTC P0C76 is not set.

image If the DTC is set

Replace the T6 Power Inverter Module.

image If the DTC is not set

5. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P150D OR P150E: SUPPLY VOLTAGE CIRCUIT(S) 1-2 LOW VOLTAGE

Diagnostic Instructions

image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P150D

Supply Voltage Circuit 2 Low Voltage

DTC P150E

Supply Voltage Circuit 1 Low Voltage

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains three motor control modules and the hybrid/EV powertrain control module 1. Two of the motor control modules operate their respective drive motor based upon power inverter module commands. The third motor control module controls the auxiliary transmission fluid pump. The hybrid/EV powertrain control module 1 and the motor control modules share the power inverter module ignition voltage circuit, battery voltage circuits and chassis ground.

Conditions for Running the DTC


The vehicle is ON. Conditions for Setting the DTC P150D

Battery voltage on circuit 2 is less than 8.0 V for more than 2.5 s.

P150E

Battery voltage on circuit 1 is less than 8.0 V for more than 2.5 s.

Action Taken When the DTC Sets


DTC P150D and P150E are Type C DTCs.

Conditions for Clearing the DTC


DTC P150D and P150E are Type C DTCs.

Reference Information


Schematic Reference

Hybrid/EV Controls Schematics

Connector End View Reference

image COMPONENT CONNECTOR END VIEWS - INDEX

image INLINE HARNESS CONNECTOR END VIEWS - INDEX

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Testing


1. Vehicle ON.

2. Verify DTC P0562 or P0563 is not set.

image If any of the DTCs are set

Refer to DTC B1325, B1330, B1517, C0800, C0899, C0900, C12E1, C12E2, P0561-P0563, P1A0C, P1A0D, or P1EFC .

image If none of the DTCs are set

3. Verify DTC P150D or P150E is not set.

image If DTC P150D is set

1. Vehicle OFF, disconnect the X1 harness connector at the T6 Power Inverter Module.

2. Verify a test lamp illuminates between the B+ circuit terminal 50 and ground.

image If the test lamp does not illuminate and the circuit fuse is good

1. Remove the test lamp.

2. Test for less than 2 Ω in the B+ circuit end to end.

image If 2 Ω or greater, repair the open/high resistance in the circuit.

image If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.

image If the test lamp does not illuminate and the circuit fuse is open

1. Remove the test lamp.

2. Test for infinite resistance between the B+ circuit and ground.

image If less than infinite resistance, repair the short to ground on the circuit. image If infinite resistance, replace the T6 Power Inverter Module.

image If the test lamp illuminates

3. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

4. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set

5. All OK.

image If DTC P150E is set

1. Vehicle OFF, disconnect the X1 harness connector at the T6 Power Inverter Module.

2. Verify a test lamp illuminates between the B+ circuit terminal 2 and ground.

image If the test lamp does not illuminate and the circuit fuse is good

1. Remove the test lamp.

2. Test for less than 2 Ω in the B+ circuit end to end.

image If 2 Ω or greater, repair the open/high resistance in the circuit.

image If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.

image If the test lamp does not illuminate and the circuit fuse is open

1. Remove the test lamp.

2. Test for infinite resistance between the B+ circuit and ground.

image If less than infinite resistance, repair the short to ground on the circuit. image If infinite resistance, replace the T6 Power Inverter Module.

image If the test lamp illuminates

3. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

4. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set

5. All OK.

image If none of the DTCs are set

4. All OK.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P15F0: ENGINE TORQUE DELIVERED SIGNAL MESSAGE COUNTER INCORRECT

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptor


DTC P15F0

Engine Torque Delivered Signal Message Counter Incorrect

Circuit/System Description


This diagnostic applies to internal microprocessor integrity conditions within the hybrid/EV powertrain control module 1. The hybrid/EV powertrain control module 1 is internal to the power inverter module, often referred to as the drive motor generator power inverter module, and is not serviced separately. The hybrid/EV powertrain control module 1 monitors its ability to read and write to the memory. The hybrid/EV powertrain control module 1 processor monitors the data to verify that the indicated engine torque delivered calculation is correct.

Conditions for Running the DTC


image Vehicle is ON.

image Run/Crank is 9.5 V or greater. OR

Ignition Run/Crank is 11 V or greater.


Conditions for Setting the DTC


The control module has detected an internal malfunction.

Action Taken When the DTC Sets


image DTC P15F0 is a Type A DTC.

image The hybrid/EV powertrain control module 1 requests the hybrid powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC DTC P15F0 is a Type A DTC. Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P15F0 is not set.

image If the DTC is set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

3. All OK

image If the DTC is not set

3. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P15F1: AXLE TORQUE REQUEST SIGNAL MESSAGE COUNTER INCORRECT

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptor


DTC P15F1

Axle Torque Request Signal Message Counter Incorrect

Circuit/System Description


This diagnostic applies to internal microprocessor integrity conditions within the hybrid/EV powertrain control module 1. The hybrid/EV powertrain control module 1 is internal to the power inverter module, often referred to as the drive motor generator power inverter module, and is not serviced separately. The hybrid/EV powertrain control module 1 monitors its ability to read and write to the memory. The hybrid/EV powertrain control module 1 processor monitors the data to verify that the indicated axle torque requested calculation is correct.

Conditions for Running the DTC


image Vehicle is ON.

image The run/crank voltage is 9.5 V or greater. OR

The ignition run/crank voltage is 11 V or greater.


Conditions for Setting the DTC


The control module has detected an internal malfunction.

Action Taken When the DTC Sets


image DTC P15F1 is a Type A DTC.

image The hybrid/EV powertrain control module 1 requests the hybrid powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC DTC P15F1 is a Type A DTC. Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P15F1 is not set.

image If the DTC is set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

3. All OK

image If the DTC is not set

3. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P15F2: ENGINE TORQUE COMMAND SIGNAL MESSAGE COUNTER INCORRECT

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptor


DTC P15F2

Engine Torque Command Signal Message Counter Incorrect

Circuit/System Description


This diagnostic applies to internal microprocessor integrity conditions within the engine control module (ECM). The hybrid/EV powertrain control module 1 is internal to the power inverter module, often referred to as the drive motor generator power inverter module, and is not serviced separately. The hybrid/EV powertrain control module 1 sends an engine torque requested message to the ECM over the serial data circuits. The ECM monitors the data to verify the indicated engine torque requested calculation is correct. The ECM processor monitors the data to verify that the engine torque command is correct.

Conditions for Running the DTC


image Vehicle is ON.

image The system voltage is 8 - 18 V. image DTC U1817 is not set.

Conditions for Setting the DTC


The control module has detected an internal malfunction.

Action Taken When the DTC Sets


image DTC P15F2 is a Type A DTC.

image The hybrid/EV powertrain control module 1 requests the hybrid/EV powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC DTC P15F2 is a Type A DTC. Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


NOTE: Diagnose and repair any communication DTCs prior to performing this testing.


1. Vehicle ON.

2. Verify DTC P15F2 is not set.

image If the DTC is set

1. Verify the K20 ECM has the latest calibration in Calibration Information.

image If the K20 ECM does not have the latest calibration, program the K20 ECM. image If the K20 ECM has the latest calibration, replace the K20 ECM.

2. Verify the DTC does not set.

image If the DTC sets, replace the K20 ECM. image If the DTC does not set.

3. All OK

image If the DTC is not set

3. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for K20 ECM replacement, programming, and setup

DTC P15FC: HYBRID/EV BATTERY CONTACTOR STATUS MESSAGE COUNTER INCORRECT

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P15FC

Hybrid/EV Battery Contactor Status Message Counter Incorrect

Circuit/System Description

This diagnostic applies to internal microprocessor integrity conditions within the hybrid/EV powertrain control module 1. The hybrid/EV powertrain control module 1 is internal to the power inverter module, often referred to as the drive motor generator power inverter module, and is not serviced separately. The hybrid/EV powertrain control module 1 monitors its ability to read and write to the memory. The hybrid/EV powertrain control module 1 processor monitors the data to verify that the indicated contactor closure status is correct.

Conditions for Running the DTC The vehicle is ON for 1 second. Conditions for Setting the DTC

The control module has detected an internal malfunction.

Actions Taken When the DTC Sets


image DTC P15FC is a Type A DTC.

image The hybrid/EV powertrain control module 1 requests the hybrid/EV powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC DTC P15FC is a Type A DTC. Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P15FC is not set.

image If the DTC is set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

3. All OK

image If the DTC is not set

3. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P16E0: ENGINE PERFORMANCE - NO TORQUE DETECTED

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptor


DTC P16E0

Engine Performance - No Torque Detected

Circuit/System Description


This vehicle does not use a 12 V starter motor to crank the internal combustion engine. A much more powerful 300 V motor located within the transmission is utilized to crank the engine. This motor, drive motor 1, can rotate the engine to operating speed within just a few hundred milliseconds. The hybrid/EV powertrain control module 1 can detect a condition where the engine is cranking but does not start or has stalled.

Conditions for Running the DTC


image The vehicle is ON.

image DTC U0100 is not set. image Engine running.

image Fuel Level is NOT Low.

image No Fuel Level sensor DTCs set.

image Commanded engine torque is 50 or greater.


Conditions for Setting the DTC


The difference between commanded engine torque and delivered engine torque is 50 or greater for 3.5 seconds out of a 4 second window.

Action Taken When the DTC Sets DTC P16E0 is a Type A DTC. Conditions for Clearing the DTC DTC P16E0 is a Type A DTC. Diagnostic Aids

Any condition that causes the engine to stall and/or not start may set this DTC. Possible conditions include:

image Fuel conditions such as low pressure or contamination. image Engine conditions such as low compression.

image Restricted exhaust or air intake systems.

Always inspect for DTCs that would cause an engine stall and/or no start condition.

Reference Information

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON. Operate the hood release to open the hood. The engine should start and run.

2. Verify the engine starts.

image If the engine fails to start

Diagnose the engine system. Refer to Engine Cranks But Does Not Run .

image If the engine starts

3. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

DTC P16F3: CONTROL MODULE REDUNDANT MEMORY PERFORMANCE (HYBRID/EV POWERTRAIN CONTROL MODULE 1)

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptor


DTC P16F3

Control Module Redundant Memory Performance

Circuit/System Description


This diagnostic applies to internal microprocessor integrity conditions within the hybrid/EV powertrain control module 1. The hybrid/EV powertrain control module 1 is internal to the power inverter module, often referred to as the drive motor generator power inverter module, and is not serviced separately. The hybrid/EV powertrain control module 1 monitors its ability to read and write to the memory. The hybrid/EV powertrain control module 1 processor stores identical data in two locations and compares the data to verify that the stored data is correct.

Conditions for Running the DTC


The system voltage is 11 V or greater.

Conditions for Setting the DTC

The control module has detected that data identical when stored is not the same when retrieved.

Action Taken When the DTC Sets


image DTC P16F3 is a Type A DTC.

image The hybrid/EV powertrain control module 1 requests the hybrid/EV powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC DTC P16F3 is a Type A DTC. Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P0335 or any communication U-code DTC is not set.

image If any of the DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

image If none of the DTCs are set

3. Verify DTC P16F3 is not set.

image If the DTC is set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

3. All OK

image If the DTC is not set

4. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup.

DTC P16F4: CONTROL MODULE TRANSMISSION RANGE SWITCH INPUT CIRCUITRY PERFORMANCE (HYBRID/EV POWERTRAIN CONTROL MODULE 1)

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptor


DTC P16F4

Control Module Transmission Range Switch Input Circuitry Performance

Circuit/System Description


The transmission internal mode switch, often referred to as the automatic transmission manual shift shaft position switch, is a hall-effect switch attached to the transmission case within the transmission. The 5 outputs from the switch indicate which position is selected by the transmission manual shaft. Five outputs (A, B, C, P, S) are range selection inputs to the hybrid/EV powertrain control module 1. The input voltage at the modules is high when the switch is open and low when the switch is closed to ground. The state of each input is displayed on the scan tool as Internal Mode Switch A/B/C/P/S. The Internal Mode Switch Range input parameters represented are transmission range signal A, signal B, signal C, and signal P signal S. The hybrid/EV powertrain control module 1 is internal to the power inverter module, often referred to as the drive motor generator power inverter module, and is not serviced separately.

Conditions for Running the DTC


image The vehicle is ON.

image Ignition voltage is greater than 9.5 V.


Conditions for Setting the DTC


The control module has detected the commanded transmission range state is not correct based upon internal calculations or by a comparison to input or output torque conditions.

Action Taken When the DTC Sets


image DTC P16F4 is a Type A DTC.

image Vehicle propulsion will be disabled. The hybrid/EV powertrain control module 1 requests the hybrid/EV powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC DTC P16F4 is a Type A DTC. Reference Information Schematic Reference

Hybrid/EV Controls Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections

image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification


1. Verify DTC P1824, P182A - P182F, P1838 - P1841, P18B5 - P18BA, P18BC, P18BF, P18C0, P18C2, or

P18C3 is not set.

image If any of the DTCs are set

Refer to DTC P1824, P182A-P182F, P1838-P1841, P18B5-P18BA, P18BC, P18BF, P18C0, P18C2, or P18C3 .

image If none of the DTCs are set

2. Verify that DTC P16F4 is not set.

image If the DTC is set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

3. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set

4. All OK

image If the DTC is not set

3. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming and setup.

DTC P16F6: CONTROL MODULE TRANSMISSION RANGE CALCULATION PERFORMANCE (HYBRID/EV POWERTRAIN CONTROL MODULE 1)

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptor

DTC P16F6

Control Module Transmission Range Calculation Performance

Circuit/System Description


This diagnostic applies to internal microprocessor integrity conditions within the hybrid/EV powertrain control module 1. The hybrid/EV powertrain control module 1 is internal to the power inverter module, often referred to as the drive motor generator power inverter module, and is not serviced separately. The hybrid/EV powertrain control module 1 monitors its ability to read and write to the memory. The hybrid/EV powertrain control module 1 processor monitors the data to verify that the commanded range state calculation is correct.

Conditions for Running the DTC


image The vehicle is ON.

image The system voltage is greater than 9.5 V.


Conditions for Setting the DTC


The control module has detected the commanded transmission range state is not correct based upon internal calculations or by a comparison to input or output torque conditions.

Action Taken When the DTC Sets


image DTC P16F6 is a Type A DTC.

image The hybrid/EV powertrain control module 1 requests the hybrid powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC DTC P16F6 is a Type A DTC. Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P16F6 is not set.

image If the DTC is set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

3. All OK

image If the DTC is not set

3. All OK

Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, setup, and programming

DTC P179A: AUXILIARY TRANSMISSION FLUID PUMP OVERSPEED

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptor


DTC P179A

Auxiliary Transmission Fluid Pump Overspeed

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains two motor control modules and the hybrid/EV powertrain control module 1. The motor control modules operate their respective drive motor generator based upon drive motor generator power inverter module commands. The hybrid/EV powertrain control module 1 controls the auxiliary transmission fluid pump motor. The hybrid powertrain control module and the motor control modules share the power inverter module ignition voltage circuit, battery voltage circuits and chassis ground.

Conditions for Running the DTC


The vehicle is ON or the power inverter module is awake.

Conditions for Setting the DTC


An auxiliary transmission fluid pump motor speed of greater than 6500 RPM has been detected.

Action Taken When the DTC Sets DTC P179A is a Type A DTC. Conditions for Clearing the DTC DTC P179A is a Type A DTC. Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P179A is not set.

image If the DTC is set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

3. All OK

image If the DTC is not set

3. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup.

DTC P190A-P190F: DRIVE MOTOR 1-2 INVERTER PHASE U, V OR W TEMPERATURE ERRATIC

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P190A

Drive Motor 1 Inverter Phase U Temperature Erratic

DTC P190B

Drive Motor 1 Inverter Phase V Temperature Erratic

DTC P190C

Drive Motor 1 Inverter Phase W Temperature Erratic

DTC P190D

Drive Motor 2 Inverter Phase U Temperature Erratic

DTC P190E

Drive Motor 2 Inverter Phase V Temperature Erratic

DTC P190F

Drive Motor 2 Inverter Phase W Temperature Erratic

Circuit/System Description

This is an internal fault detection of the power inverter module, often referred to as the drive motor generator power inverter module. This fault is handled inside the power inverter module, and no external circuits are involved.

Conditions for Running the DTC


The vehicle is ON.

Conditions for Setting the DTC


The inverter phase temperature is intermittent.

Actions Taken When the DTC Sets


DTCs P190A-P190F are Type B DTCs.

Conditions for Clearing the DTC


DTCs P190A-P190F are Type B DTCs.

Reference Information


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTCs P190A-P190F are not set.

image If any of the DTCs are set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set

3. All OK.

image If none of the DTCs are set

3. All OK.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module replacement, programming, and setup

DTC P1A4F, P1A50-P1A54, P1ADC, OR P1ADD: DRIVE MOTOR 1-2 CONTROL MODULE

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P1A4F

Drive Motor 1 Control Module Not Programmed

DTC P1A50

Drive Motor 1 Control Module Random Access Memory

DTC P1A51

Drive Motor 1 Control Module Read Only Memory

DTC P1A52

Drive Motor 2 Control Module Not Programmed

DTC P1A53

Drive Motor 2 Control Module Random Access Memory

DTC P1A54

Drive Motor 2 Control Module Read Only Memory

DTC P1ADC

Drive Motor 1 Control Module Long Term Memory Performance

DTC P1ADD

Drive Motor 2 Control Module Long Term Memory Performance

Circuit/System Description


The drive motor control modules are internal to the power inverter module, often referred to as the drive motor generator power inverter module, and are not serviced separately. This fault is handled inside the drive motor control modules and no external circuits are involved.

Conditions for Running the DTC


image The vehicle is ON.

image Ignition voltage is 8 - 18 V.


Conditions for Setting the DTC


The control module has detected an internal malfunction or a service module has been installed but not yet programmed.

Actions Taken When the DTC Sets


image DTCs P1A4F, P1A50, P1A51, P1A52, P1A53, and P1A54 are Type A DTCs.

image P1ADC and P1ADD are Type B DTCs.

image The power inverter module requests the hybrid powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC


image DTCs P1A4F, P1A50, P1A51, P1A52, P1A53, and P1A54 are Type A DTCs.

image P1ADC and P1ADD are Type B DTCs.


Reference Information


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P1A4F, P1A50, P1A51, P1A52, P1A53, P1A54, P1ADC and P1ADD is not set.

image If any of the DTCs are set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

3. All OK

image If none of the DTCs are set

3. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P1ADE, P1ADF, P1AE0, OR P1AE1: DRIVE MOTOR 1-2 CONTROL MODULE SYSTEM VOLTAGE

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P1ADE

Drive Motor 1 Control Module System Voltage Low Voltage

DTC P1ADF

Drive Motor 1 Control Module System Voltage High Voltage

DTC P1AE0

Drive Motor 2 Control Module System Voltage Low Voltage

DTC P1AE1

Drive Motor 2 Control Module System Voltage High Voltage

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains two motor control modules and the hybrid/EV powertrain control module 1. The two motor control modules operate their respective drive motor based upon power inverter module commands. The hybrid/EV powertrain control module 1 controls the auxiliary transmission fluid pump. The hybrid/EV powertrain control module 1 and the motor control modules share the power inverter module ignition voltage circuit, battery voltage circuits and chassis ground.

Conditions for Running the DTC


The Vehicle is ON. Conditions for Setting the DTC DTCs P1ADE and P1AE0

Motor control module ignition-voltage is less than or equal to 10 V for 5 s.

DTCs P1ADF and P1AE1

Motor control module ignition voltage is greater than 16 V for 5 s.

Actions Taken When the DTC Sets


DTCs P1ADE, P1ADF, P1AE0 and P1AE1 are Type C DTCs.

Conditions for Clearing the DTC


DTCs P1ADE, P1ADF, P1AE0 and P1AE1 are Type C DTCs.

Diagnostic Aids


A battery charger or vehicle jump start may have set DTCs P1ADF or P1AE1.

Reference Information


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P0562 or P0563 is not set.

image If any of the DTCs are set

Refer to DTC B1325, B1330, B1517, C0800, C0899, C0900, C12E1, C12E2, P0561-P0563, P1A0C,

P1A0D, or P1EFC .

image If none of the DTCs are set

3. Verify DTC P1ADE, P1ADF, P1AE0, or P1AE1 is not set.

image If any of the DTCs are set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

3. All OK

image If the DTC is not set

4. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup.

DTC P1AEE OR P1AEF: DRIVE MOTOR 1-2 CONTROL MODULE HYBRID/EV BATTERY SYSTEM VOLTAGE HIGH VOLTAGE

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P1AEE

Drive Motor 1 Control Module Hybrid/EV Battery System Voltage High Voltage

DTC P1AEF

Drive Motor 2 Control Module Hybrid/EV Battery System Voltage High Voltage

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module contains two drive motor control modules. Each motor control module measures hybrid battery high voltage with several internal sensors.

The motor control modules monitors for high voltage that is greater than the system allows during normal operation.

Conditions for Running the DTC

image The hybrid/EV battery system contactor relays are closed. image Ignition voltage is greater than 8 V and no more than 18 V.

Conditions for Setting the DTC


Greater than 450 V on the high voltage circuit is detected by the motor control module. OR

The motor control module has detected an internal fault.

Actions Taken When the DTC Sets


image DTCs P1AEE and P1AEF are Type A DTCs.

image The power inverter module disables propulsion during the current ignition cycle.


Conditions for Clearing the DTC


DTCs P1AEE and P1AEF are Type A DTCs.

Diagnostic Aids


If the high voltage contactor relays open while high current is present a large voltage surge may be created. The resultant voltage surge may set DTC P1AEE or P1AEF. Always check for other DTCs or conditions such as loss of isolation, contactor control, etc. that could result in a vehicle shutdown/stall.

Reference Information


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P0ABB, P0ABC, or P0ABD is not set.

image If any of the DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

image If none of the DTCs are set

3. Verify DTC P1AF0, P1AF2, P1AF4, P1AF6, P1B0B, P1B43, P1E1C, or P1E1E is not set.

image If any of the DTCs are set


NOTE: The loss of isolation may be intermittent and internal to the transmission.


Inspect the vehicle for a loss of isolation condition. Refer to Loss of Isolation on the High Voltage Main Bus .

image If none of the DTCs are set

4. Verify no other DTCs are set.

image If any DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

image If no other DTCs are set

5. Verify DTC P1AEE or P1AEF is not set.

image If any of the DTCs are set

Replace the T6 Power Inverter Module.

image If none of the DTCs are set

6. All OK.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup.

DTC P1AF0 OR P1AF2: DRIVE MOTOR 1-2 CONTROL MODULE HYBRID/EV BATTERY VOLTAGE SYSTEM ISOLATION LOST

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P1AF0

Drive Motor 1 Control Module Hybrid/EV Battery Voltage System Isolation Lost

DTC P1AF2

Drive Motor 2 Control Module Hybrid/EV Battery Voltage System Isolation Lost

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains two motor control modules and the hybrid/EV powertrain control module 1. The two motor control modules operate their respective drive motor based upon power inverter module commands. The hybrid/EV powertrain control module 1 controls the auxiliary transmission fluid pump. The motor control modules test for isolation between each high voltage bus and vehicle chassis whenever high voltage is present at the power inverter module.

If the motor control modules detect an isolation loss on either the positive or negative high voltage bus, the hybrid/EV powertrain control module 1 reports a fault. The isolation loss may be caused by any component in the high voltage system.

Conditions for Running the DTC


image DTCs P1AE8, P1AE9, P1AEC, or are not set. image The high voltage contactor relays are closed. image High voltage is greater than 50 V.

image Ignition voltage is 8 - 18 V.

Conditions for Setting the DTC


The ratio between Negative Supply Isolation Voltage and Positive Supply Isolation Voltage is greater than 4.53 or less than 0.21 for greater than 2.5 s in a 5 s window.

Actions Taken When the DTC Sets


DTCs P1AF0 and P1AF2 are Type B DTCs.

Conditions for Clearing the DTC


DTCs P1AF0 and P1AF2 are Type B DTCs.

Reference Information


Schematic Reference

Hybrid/EV Controls Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P0AA6 or P1AE6 is not set.

image If any of the DTCs are set

Refer to DTC P0AA6 or P1AE6 .

image If none of the DTCs are set

3. Verify DTC P0A78, P0A79, P0BFD, P0BFE, P0C01, or P0C04 is not set.

image If any of the DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

image If none of the DTCs are set

4. Verify DTC P1AF0 or P1AF2 is not set.

image If any of the DTCs are set

Refer to Loss of Isolation on the High Voltage Main Bus .

image If none of the DTCs are set

5. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

DTC P1AF4-P1AF7: DRIVE MOTOR 1-2 CONTROL MODULE HYBRID/EV BATTERY VOLTAGE ISOLATION SENSING CIRCUIT 1 LOW/HIGH VOLTAGE

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P1AF4

Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 1 Low Voltage

DTC P1AF5

Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 1 High Voltage

DTC P1AF6

Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 1 Low Voltage

DTC P1AF7

Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 1 High Voltage

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains two motor control modules and the hybrid/EV powertrain control module 1. Two of the motor control modules operate their respective drive motor based upon power inverter module commands. The hybrid/EV powertrain control module 1 controls the auxiliary transmission fluid pump. The motor control modules and the hybrid/EV powertrain control module 1 are part of the power inverter module and are not serviced separately.

The motor control modules test for isolation between each high voltage bus and vehicle chassis whenever high voltage is present at the power inverter module.

Conditions for Running the DTC


P1AF4 and P1AF6

image The Vehicle is ON.

image The hybrid/EV contactors are closed.

P1AF5 and P1AF7

The Vehicle is ON. Conditions for Setting the DTC P1AF4 and P1AF6

The motor control module detects Positive Supply Isolation sensor voltage less than 20 V.

P1AF5 and P1AF7

The motor control module detects the value of the Positive Supply Isolation voltage subtracted from the pack voltage is greater than 60 V.

Actions Taken When the DTC Sets


image DTCs P1AF4, P1AF5, P1AF6 and P1AF7 are Type A DTCs.

image The hybrid/EV powertrain control module 1 requests the hybrid/EV powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC


DTCs P1AF4, P1AF5, P1AF6 and P1AF7 are Type A DTCs.

Reference Information


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P0AA6 is not set.

image If the DTC is set

Refer to DTC P0AA6 or P1AE6 .

image If the DTC is not set

3. Verify DTC P1AF4, P1AF5, P1AF6, or P1AF7 is not set.

image If any of the DTCs are set

Refer to Loss of Isolation on the High Voltage Main Bus .

image If none of the DTCs are set

4. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

DTC P1B0B OR P1B0C: DRIVE MOTOR 1 CONTROL MODULE HYBRID/EV BATTERY VOLTAGE ISOLATION SENSING CIRCUIT 2 LOW/HIGH VOLTAGE

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check -

Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P1B0B

Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 Low Voltage

DTC P1B0C

Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 High Voltage

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains two motor control modules and the hybrid/EV powertrain control module 1. The two motor control modules operate their respective drive motor based upon power inverter module commands. The hybrid/EV powertrain control module 1 controls the auxiliary transmission fluid pump. The motor control modules and the hybrid/EV powertrain control module 1 are part of the power inverter module and are not serviced separately.

The motor control modules test for isolation between each high voltage bus and vehicle chassis whenever high voltage is present at the power inverter module.

Conditions for Running the DTC


image The vehicle is ON.

image Contactors are closed.


Conditions for Setting the DTC


P1B0B

The motor control module detects Negative Supply Isolation sensor voltage less than 20 V.

P1B0C

The motor control module detects Negative Supply Isolation sensor voltage greater than 60 V.

Actions Taken When the DTC Sets


image DTCs P1B0B and P1B0C are Type A DTCs.

image The hybrid/EV powertrain control module 1 requests the hybrid/EV powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC


DTCs P1B0B and P1B0C are Type A DTCs.

Reference Information


Schematic Reference

Hybrid/EV Controls Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P1BOB or P1B0C is not set.

image If any of the DTCs are set

Refer to Loss of Isolation on the High Voltage Main Bus .

image If none of the DTCs are set

3. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

DTC P1B0D OR P1B0E: DRIVE MOTOR 1-2 CONTROL MODULE DRIVE MOTOR 1-2 OVERSPEED

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P1B0D

Drive Motor 1 Control Module Drive Motor 1 Overspeed

DTC P1B0E

Drive Motor 2 Control Module Drive Motor 2 Overspeed

Circuit/System Description

The drive motor position sensor is monitored by the drive motor control module. The drive motor control module monitors the angular position, speed and direction of the drive motor based upon the signals of the resolver-type position sensor. The position sensor allows the drive motor control module to determine the exact position, speed and direction of the drive motor. The motor control modules are part of the power inverter module, often referred to as the drive motor generator power inverter module, and are not serviced separately.

Conditions for Running the DTC


Vehicle is ON.

Conditions for Setting the DTC


Drive motor speed is greater than 12,700 RPM.

Actions Taken When the DTC Sets


image DTCs P1B0D and P1B0E are Type A DTCs.

image The hybrid/EV powertrain control module 1 requests the hybrid/EV powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC


DTCs P1B0D and P1B0E are Type A DTCs.

Diagnostic Aids


image A transmission mechanical failure that occurs during high drive motor generator torque may cause these DTCs to set.

image Repeated drive motor operation at speeds in excess of the DTC limits may cause deterioration of the drive motor rotor magnets.


Reference Information


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify no other Hybrid Transmission DTCs are set.

image If other Hybrid Transmission DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

image If no other Hybrid Transmission DTCs are set

3. Verify DTC P1B0D or P1B0E is not set.

image If any of the DTCs are set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

3. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

4. All OK

image If none of the DTCs are set

4. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P1B15: REGENERATIVE BRAKING TORQUE REQUEST SIGNAL MESSAGE COUNTER INCORRECT

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P1B15

Regenerative Braking Torque Request Signal Message Counter Incorrect

Circuit/System Description


This diagnostic applies to internal microprocessor integrity conditions within the hybrid/EV powertrain control module 1. The hybrid/EV powertrain control module 1 is internal to the power inverter module, often referred to as the drive motor generator power inverter module, and is not serviced separately. The hybrid/EV powertrain control module 1 monitors its ability to read and write to the memory. The hybrid/EV powertrain control module 1 processor monitors the data to verify that the indicated brake torque request calculation is correct.

Conditions for Running the DTC


image The vehicle is ON for 1 second.

image The Run/Crank system voltage is 9.5 V or greater OR

The ignition/Run/Crank voltage is 11 V or greater.


Conditions for Setting the DTC


The control module has detected an internal malfunction.

Actions Taken When the DTC Sets


image DTC P1B15 is a Type A DTC.

image The hybrid/EV powertrain control module 1 requests the hybrid/EV powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC DTC P1B15 is a Type A DTC. Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P1B15 is not set.

image If the DTC is set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

3. All OK

image If the DTC is not set

3. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P1B41 OR P1B42: DRIVE MOTOR 1-2 CONTROL MODULE HYBRID/EV BATTERY VOLTAGE ISOLATION SENSING PERFORMANCE

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P1B41

Drive Motor 1 Control Module Hybrid/EV Battery Voltage Isolation Sensing Performance

DTC P1B42

Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Performance

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains two motor control modules and the hybrid/EV powertrain control module 1. The two motor control modules operate their respective drive motor based upon power inverter module commands. The hybrid/EV powertrain control module 1 controls the auxiliary transmission fluid pump. The motor control modules and the hybrid/EV powertrain control module 1 are part of the power inverter module and are not serviced separately.

The motor control modules test for isolation between each high voltage bus and vehicle chassis whenever high voltage is present at the power inverter module.

Conditions for Running the DTC


image The vehicle is ON.

image The high voltage contactor relays are closed.

P1B41

DTC P1AE8, P1AE9, P1B0B, or P1B0C is not set.

P1B42

DTC P1AEA, P1AEB, P1B43, or P1B44 is not set.

Conditions for Setting the DTC


The difference between the Isolation Supply voltage sensed and hybrid battery voltage is greater than 70 V. And

The difference between the Isolation Supply voltage sensed and the high voltage measured is greater than 70 V.

Actions Taken When the DTC Sets


image DTCs P1B41 and P1B42 are Type A DTCs.

image The hybrid/EV powertrain control module 1 requests the hybrid/EV powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC


DTCs P1B41 and P1B42 are Type A DTCs.

Reference Information


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P1B41 or P1B42 is not set.

image If any of the DTCs are set

Refer to Loss of Isolation on the High Voltage Main Bus .

image If none of the DTCs are set

3. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

DTC P1B43 OR P1B44: DRIVE MOTOR 2 CONTROL MODULE HYBRID/EV BATTERY VOLTAGE ISOLATION SENSING CIRCUIT 2 LOW/HIGH VOLTAGE

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P1B43

Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 Low Voltage

DTC P1B44

Drive Motor 2 Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 High Voltage

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains two motor control modules and the hybrid/EV powertrain control module 1. The two motor control modules operate their respective drive motor based upon power inverter module commands. The hybrid/EV powertrain control module 1 controls the auxiliary transmission fluid pump. The motor control modules and the hybrid/EV powertrain control module 1 are part of the power inverter module and are not serviced separately.

The motor control modules test for isolation between each high voltage bus and vehicle chassis whenever high voltage is present at the power inverter module.

Conditions for Running the DTC


image The vehicle is ON.

image The high voltage contactor relays are closed.


Conditions for Setting the DTC


P1B43

The drive motor control module detects Negative Supply Isolation sensor voltage less than 20 V for 1 s.

P1B44

The drive motor control module detects Negative Supply Isolation sensor voltage greater than 60 V for 1 s.

Actions Taken When the DTC Sets

image DTCs P1B43 and P1B44 are Type A DTCs.

image The hybrid/EV powertrain control module 1 requests the hybrid/EV powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC


DTCs P1B43 and P1B44 are Type A DTCs.

Reference Information


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P1B43 or P1B44 is not set.

image If any of the DTCs are set

Refer to Loss of Isolation on the High Voltage Main Bus .

image If none of the DTCs are set

3. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

DTC P1E0A OR P1E0B: DRIVE MOTOR 1-2 CONTROL MODULE TORQUE CALCULATION PERFORMANCE

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptors


DTC P1E0A

Drive Motor 1 Control Module Torque Calculation Performance

DTC P1E0B

Drive Motor 2 Control Module Torque Calculation Performance

Circuit/System Description


The motor control modules perform redundant calculations of desired and achieved torque values. These values are continuously compared and should always be the same.

Conditions for Running the DTC


Ignition voltage is 8 - 18 V.

Conditions for Setting the DTC


The redundant torque calculation does not match the primary calculation.

Action Taken When the DTC Sets


image DTCs P1E0A and P1E0B are Type A DTCs.

image The hybrid/EV powertrain control module 1 requests the hybrid/EV powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC


DTCs P1E0A and P1E0B are Type A DTCs.

Reference Information


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify no transmission or motor control module DTCs are set.

image If any of the DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

image If none of the DTCs are set

3. Verify DTC P1E0A or P1E0B is not set.

image If any of the DTCs are set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

3. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

4. All OK

image If none of the DTCs are set

4. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P1E1B-P1E1F: AUXILIARY TRANSMISSION FLUID PUMP CONTROL MODULE HYBRID/EV

BATTERY VOLTAGE ISOLATION SENSING

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptors


DTC P1E1B

Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Isolation Sensing Performance

DTC P1E1C

Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 1 Low Voltage

DTC P1E1D

Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 1 High Voltage

DTC P1E1E

Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 Low Voltage

DTC P1E1F

Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage Isolation Sensing Circuit 2 High Voltage

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains three motor control modules and the hybrid/EV powertrain control module 1. Two of the motor control modules operate their respective drive motor based upon power inverter module commands. The third motor control module controls the auxiliary transmission fluid pump. The motor control modules and the hybrid/EV powertrain control module 1 are part of the power inverter module and are not serviced separately.

The motor control modules test for isolation between each high voltage bus and vehicle chassis whenever high voltage is present at the power inverter module.

Conditions for Running the DTC


image The vehicle is ON.

image The system voltage is at least 9 V.


Conditions for Setting the DTC


P1E1B

The motor control module detects a correlation difference between the Isolation Supply sensor and overall pack

voltage.

P1E1C and P1E1E

The motor control module detects Isolation Supply sensor voltage less than 20 V.

P1E1D and P1E1F

The motor control module detects Isolation Supply sensor voltage greater than 40 V.

Action Taken When the DTC Sets


DTCs P1E1B, P1E15C, P1E1D, P1E1E, and P1E1F are Type B DTCs.

Conditions for Clearing the DTC


DTCs P1E1B, P1E15C, P1E1D, P1E1E, and P1E1F are Type B DTCs.

Reference Information


Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P1E1B, P1E1C, P1E1D, P1E1E, or P1E1F is not set.

image If any of the DTCs are set

Refer to Loss of Isolation on the High Voltage Main Bus .

image If none of the DTCs are set

3. All OK.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

DTC P1E22: AUXILIARY TRANSMISSION FLUID PUMP CONTROL MODULE HYBRID/EV BATTERY VOLTAGE SYSTEM ISOLATION LOST

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.

DTC Descriptors


DTC P1E22

Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery Voltage System Isolation Lost

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains three motor control modules and the hybrid/EV powertrain control module 1. Two of the motor control modules operate their respective drive motor based upon power inverter module commands. The third motor control module controls the auxiliary transmission fluid pump. Each drive motor control module monitors its internal high voltage sensor for correct operation; no external circuits are involved. The motor control modules and the hybrid/EV powertrain control module 1 are part of the power inverter module and are not serviced separately.

The motor control modules test for isolation between each high voltage bus and vehicle chassis whenever high voltage is present at the power inverter module.

Conditions for Running the DTC


image The vehicle is ON.

image The system voltage is 8 - 18 V.

image The high voltage contactor relays are closed. image DTCs P1AE8, P1AE9, or P1AEC are not set.

Conditions for Setting the DTC


The drive motor control module detects an isolation fault between the battery pack and chassis ground.

Action Taken When the DTC Sets DTC P1E22 is a Type B DTC. Conditions for Clearing the DTC DTC P1E22 is a Type B DTC. Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P1E22 is not set.

image If the DTC is set

Refer to Loss of Isolation on the High Voltage Main Bus .

image If the DTC is not set

3. All OK

DTC P1E29: AUXILIARY TRANSMISSION FLUID PUMP CONTROL MODULE CALCULATED

MOTOR POSITION PERFORMANCE

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P1E29

Auxiliary Transmission Fluid Pump Control Module Calculated Motor Position Performance

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains two motor control modules and the hybrid/EV powertrain control module 1. The two motor control modules operate their respective drive motor based upon power inverter module commands. The hybrid/EV powertrain control module 1 controls the auxiliary transmission fluid pump. The hybrid/EV powertrain control module 1 and the motor control modules share the power inverter module ignition voltage circuit, battery voltage circuits and chassis ground. The motor control modules and the hybrid/EV powertrain control module 1 are part of the power inverter module and are not serviced separately.

The auxiliary transmission fluid pump control module uses sensorless control to estimate motor speed and position from the phase current sensors.

Conditions for Running the DTC


The vehicle is ON or the power inverter module is awake.

Conditions for Setting the DTC


The auxiliary transmission fluid pump control module detects a fault.

Actions Taken When the DTC Sets DTC P1E29 is a Type A DTC. Conditions for Clearing the DTC DTC P1E29 is a Type A DTC. Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P179A, P1E20, P1E21, P1E22, P1E27, P1E28, P1E1C, P1E1D, P1E1E, P1E1F, P1E1B, P1E29,

P1E34, P1E35, or P1E36 is not set.

image If any of the DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

image If none of the DTCs are set

3. Verify DTC P1E29 is not set.

image If the DTC is set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

3. All OK

image If the DTC is not set

4. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup.

DTC P1E2A-P1E2F: AUXILIARY TRANSMISSION FLUID PUMP PHASE U-V CURRENT SENSOR

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P1E2A

Auxiliary Transmission Fluid Pump Phase U Current Sensor Circuit Low Voltage

DTC P1E2B

Auxiliary Transmission Fluid Pump Phase U Current Sensor Circuit High Voltage

DTC P1E2C

Auxiliary Transmission Fluid Pump Phase U Current Sensor Performance

DTC P1E2D

Auxiliary Transmission Fluid Pump Phase V Current Sensor Circuit Low Voltage

DTC P1E2E

Auxiliary Transmission Fluid Pump Phase V Current Sensor Circuit High Voltage

DTC P1E2F

Auxiliary Transmission Fluid Pump Phase V Current Sensor Performance

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains two motor control modules and the hybrid/EV powertrain control module 1. The two motor control modules operate their respective drive motor generator based upon power inverter module commands. The hybrid/EV powertrain control module 1 controls the auxiliary transmission fluid pump. This is an internal fault detection of the power inverter module. This fault is handled inside the power inverter module and no external circuits are involved.

Each motor control module operates its respective drive motor based upon hybrid/EV powertrain control module 1 commands. Each motor control module controls its respective motor through the sequencing actuation of high current switching transistors called insulated gate bipolar transistors. Each motor operates utilizing 3-phase alternating current AC electricity. Each insulated gate bipolar transistor operates a single phase of the drive motor generator. Each phase is individually identified as U, V, and W. Each motor control module monitors the current of each phase in order to detect out of range current conditions.

Because each individual motor's phase circuits are electrically joined together, the phases normally flow about the same amount of current. The motor control module performs a mathematical calculation to verify that the phase current sensors are accurate. If the U-V-W phase current sensors indicate about the same amount of phase current, the sum of the calculation should be near zero. If the U-V-W phase currents are not similar, this DTC will set.

Conditions for Running the DTC


The vehicle is ON or the module is awake.

Conditions for Setting the DTC


The control module has detected an internal malfunction.

Actions Taken When the DTC Sets


image DTCs P1E2A, P1E2B, P1E2C, P1E2D, P1E2E, P1E2F, are Type A DTCs.

image The power inverter module requests the hybrid/EV powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC


DTCs P1E2A, P1E2B, P1E2C, P1E2D, P1E2E, P1E2F, are Type A DTCs.

Reference Information


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P1E2A, P1E2B, P1E2C, P1E2D, P1E2E, P1E2F is not set.

image If any of the DTCs are set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power

inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

3. All OK

image If none of the DTCs are set

3. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P1E34-P1E36: AUXILIARY TRANSMISSION FLUID PUMP INVERTER TEMPERATURE SENSOR

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P1E34

Auxiliary Transmission Fluid Pump Inverter Temperature Sensor Circuit High Voltage

DTC P1E35

Auxiliary Transmission Fluid Pump Inverter Temperature Sensor Circuit Low Voltage

DTC P1E36

Auxiliary Transmission Fluid Pump Inverter Temperature Sensor Performance

Circuit/System Description


This is an internal fault detection of the power inverter module, often referred to as the drive motor generator power inverter module. This fault is handled inside the power inverter module, and no external circuits are involved.

Conditions for Running the DTC


image The vehicle is ON or the module is awake.

image Motor temperature is greater than -20°C (-4°F). If motor temperature is less than -20°C (-4°F) at vehicle ON, the drive motor must operate at greater than 20 N.m (14.75 lb ft) for a cumulative time of 1.5 minutes before the DTC will run.

P1E34

image The vehicle is ON or the module is awake for more than 10 minutes.

image The drive motor(s) have been operating.

P1E35

The vehicle is ON or the module is awake.

P1E36

image The inverter temperature is greater than -20°C (-4°F). image P0AF0 and P0AEF are not present.

Conditions for Setting the DTC


P1E34

The inverter phase temperature sensor is less than -50°C (-58°F) for 3 seconds. If the fault is detected at the start of a drive cycle the DTC will set after 600 s.

P1E35

The inverter phase temperature sensor is greater than 170°C (338°F) for 3 s.

P1E36

A 20°C (36°F) difference is observed between the individual inverter phase temperature sensor and the average of the Hybrid Electronics Coolant Temperature and the Transmission Fluid Temperature.

Actions Taken When the DTC Sets


DTCs P1E34, P1E35, and P1E36 are Type B DTCs.

Conditions for Clearing the DTC


DTCs P1E34, P1E35, and P1E36 are Type B DTCs.

Reference Information


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P1E34, P1E35, or P1E36 is not set.

image If any of the DTCs are set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

3. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module.

image If the DTC does not set.

4. All OK

image If none of the DTCs are set

3. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup.

DTC P1E37: AUXILIARY TRANSMISSION FLUID PUMP INVERTER HIGH TEMPERATURE

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P1E37

Auxiliary Transmission Fluid Pump Inverter High Temperature

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains two motor control modules and the hybrid/EV powertrain control module 1. The two motor control modules operate their respective drive motor based upon power inverter module commands. The hybrid/EV powertrain control module 1 controls the auxiliary transmission fluid pump. The inverter temperature sensor is part of the power inverter module and is not serviced separately.

Conditions for Setting the DTC


The pump inverter temperature sensor is greater than 122°C (252°F).

Actions Taken When the DTC Sets


image DTC P1E37 is a Type A DTC.

image The hybrid/EV powertrain control module 1 may command the engine into derate mode.


Conditions for Clearing the DTC DTC P1E37 is a Type A DTC. Diagnostic Aids

image Ask about the customer's driving habits, trailer towing, etc. image Ensure the engine cooling system is functioning normally.

Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P1E36 is not set.

image If the DTC is set

Refer to DTC P1E34-P1E36.

image If the DTC is not set

3. Verify that DTC P0C11, P0C12, P0C13, P0C14, P0C15, or P0C16 is not set.

image If any of the DTCs are set

Refer to DTC P0C11-P0C16.

image If none of the DTCs are set

4. Verify DTC P1E37 is not set.

image If the DTC is set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

3. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

4. All OK

image If the DTC is not set

5. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup.

DTC P1E38: AUXILIARY TRANSMISSION FLUID PUMP INVERTER SUPPLY VOLTAGE CIRCUIT

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P1E38

Auxiliary Transmission Fluid Pump Inverter Supply Voltage Circuit

Circuit/System Description


The power inverter motor, often referred to as the drive motor generator power inverter module, contains two motor control modules and the hybrid/EV powertrain control module 1. The two motor control modules operate their respective drive motor based upon power inverter module commands. The hybrid/EV powertrain control module 1 controls the auxiliary transmission fluid pump. The hybrid/EV powertrain control module 1 and the motor control modules share the power inverter module ignition voltage circuit, battery voltage circuits and chassis ground.

Conditions for Running the DTC Vehicle is ON or module is awake. Conditions for Setting the DTC

The control module does not detect voltage at the insulated gate bi-polar transistor bias power supply.

Actions Taken When the DTC Sets


image DTC P1E38 is a Type A DTC. image Propulsion is disabled.

Conditions for Clearing the DTC DTC P1E38 is a Type A DTC. Diagnostic Aids

To assist in troubleshooting and duplicating intermittent failure conditions, observe the Freeze Frame/Failure Records data. This is especially important to do before programming or replacing the power inverter module.

Reference Information


Schematic Reference

Hybrid/EV Controls Schematics

Connector End View Reference

image COMPONENT CONNECTOR END VIEWS - INDEX

image INLINE HARNESS CONNECTOR END VIEWS - INDEX

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


WARNING: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure will perform the following tasks: image Identify how to disable high voltage.

image Identify how to test for the presence of high voltage.

image Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

Failure to follow the procedures exactly as written may result in serious injury or death.


1. Perform the High Voltage Disabling procedure for servicing the T6 Power Inverter Module or the T12 Transmission.

2. Disconnect the X4 harness connector at the T6 Power Inverter Module.

3. Test for infinite resistance between the each of the AC circuit terminals listed below and ground for each phase of the G5 Transmission Fluid Pump - Electric/Auxiliary:

image X4 terminal 3 phase U image X4 terminal 2 phase V image X4 terminal 1 phase W

image If less than infinite resistance

Replace the G5 Transmission Fluid Pump - Electric/Auxiliary.

image If infinite resistance

4. Verify DTC P1E38 does not set.

image If the DTC sets

1. Perform each of the operations listed below one at a time until the fault is corrected.

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration

2. Replace the T6 Power Inverter Module.

3. Replace the G5 Transmission Fluid Pump - Electric/Auxiliary.

2. Repeat the DTC check.

image If the DTC does not set

5. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

image Refer to Automatic Transmission Fluid Pump and Fluid Filter Removal for G5 Transmission Fluid Pump - Electric/Auxiliary, often referred to as the A/Trans Fluid Pump Motor, replacement

image Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P1E39: AUXILIARY TRANSMISSION FLUID PUMP INVERTER PERFORMANCE

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P1E39

Auxiliary Transmission Fluid Pump Inverter Performance

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains two motor control modules and the hybrid/EV powertrain control module 1. The two motor control modules operate their respective drive motor based upon power inverter module commands. The hybrid/EV powertrain control module 1 controls the auxiliary transmission fluid pump. Each motor control module controls its respective motor through the sequencing actuation of high current switching transistors called insulated gate bipolar transistors. Each insulated gate bipolar transistor assembly is monitored for fault conditions. The motor control modules are part of the power inverter module and are not serviced separately.

Conditions for Running the DTC


Vehicle is ON or Charge Mode is active.

Conditions for Setting the DTC


The motor control module detects excessive current flow through the switched portion of the insulated gate bipolar transistor.

Actions Taken When the DTC Sets


image DTC P1E39 is a Type A DTC. image Propulsion is disabled.

Conditions for Clearing the DTC DTC P1E39 is a Type A DTC. Diagnostic Aids

To assist in troubleshooting and duplicating intermittent failure conditions, observe the Freeze Frame/Failure Records data. This is especially important to do before programming or replacing the power inverter module.

Reference Information


Schematic Reference

Hybrid/EV Controls Schematics

Connector End View Reference

image COMPONENT CONNECTOR END VIEWS - INDEX

image INLINE HARNESS CONNECTOR END VIEWS - INDEX

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


WARNING: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure will perform the following tasks: image Identify how to disable high voltage.

image Identify how to test for the presence of high voltage.

image Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

Failure to follow the procedures exactly as written may result in serious injury or death.


1. Perform the High Voltage Disabling procedure for servicing the T6 Power Inverter Module or the T12 Transmission.

2. Disconnect the X4 harness connector at the T6 Power Inverter Module.

3. Test for infinite resistance between the each of the AC circuit terminals listed below and ground for each phase of the G5 Transmission Fluid Pump - Electric/Auxiliary:

image Terminal 3 phase U image Terminal 2 phase V image Terminal 1 phase W

image If less than infinite resistance

Replace the G5 Transmission Fluid Pump - Electric/Auxiliary.

image If infinite resistance

4. Verify DTC P1E39 does not set.

image If the DTC sets

1. Perform each of the operations listed below one at a time until the fault is corrected.

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration

2. Replace the T6 Power Inverter Module.

3. Replace the G5 Transmission Fluid Pump - Electric/Auxiliary.

2. Repeat the DTC check.

image If the DTC does not set

5. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

image Refer to Automatic Transmission Fluid Pump and Fluid Filter Removal for G5 Transmission Fluid Pump - Electric/Auxiliary, often referred to as the A/Trans Fluid Pump Motor, replacement

image Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P1E3A: AUXILIARY TRANSMISSION FLUID PUMP MOTOR TORQUE DELIVERED PERFORMANCE

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P1E3A

Auxiliary Transmission Fluid Pump Motor Torque Delivered Performance

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains two motor control modules and the hybrid/EV powertrain control module 1. The two motor control modules operate their respective drive motor based upon power inverter module commands. The hybrid/EV powertrain control module 1 controls the auxiliary transmission fluid pump. The hybrid/EV powertrain control module 1 and the motor control modules share the power inverter module ignition voltage circuit, battery voltage circuits and chassis ground.

Conditions for Running the DTC


image The vehicle is ON.

image The system voltage is between 11.0 - 16.0 V.

image Auxiliary transmission fluid pump torque command is greater than 6.5 N.m (4.8 lb ft).


Conditions for Setting the DTC


The actual auxiliary transmission fluid pump speed is more than 200 RPM different from the commanded speed.

Actions Taken When the DTC Sets DTC P1E3A is a Type A DTC. Conditions for Clearing the DTC DTC P1E3A is a Type A DTC. Diagnostic Aids

There should always be other hybrid/EV powertrain or motor control module DTCs set along with DTC P1E3A. Always diagnose other DTCs before addressing this DTC.

Reference Information


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Verify that no other hybrid/EV powertrain or motor control module DTC is set.

image If any of the DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

image If none of the DTCs are set

2. Verify DTC P1E3A is not set.

image If the DTC is set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Verify the DTC does not set. image If the DTC sets.

1. Replace the G5 Automatic Transmission Fluid Pump.

2. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set

3. All OK

image If the DTC is not set.

3. All OK

image If the DTC is not set

3. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

image Refer to Automatic Transmission Fluid Pump and Fluid Filter Removal for G5 Automatic Transmission Fluid Pump, often referred to as the A/Trans Fluid Pump Motor, replacement

image Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P1E4A OR P1E4B: CONTROL MODULE REDUNDANT DRIVE MOTOR 1-2 SPEED SENSING CIRCUIT

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P1E4A

Control Module Redundant Drive Motor 1 Speed Sensing Circuit

DTC P1E4B

Control Module Redundant Drive Motor 2 Speed Sensing Circuit

Circuit/System Description


The drive motor position sensor is monitored by the motor control module. The motor control module monitors the angular position, speed and direction of the drive motor based upon the signals of the resolver-type position sensor. The position sensor allows the motor control module to determine the exact position, speed and direction of the drive motor. The hybrid/EV powertrain control module 1 also calculates motor speed. This fault is handled inside the power inverter module, often referred to as the drive motor generator power inverter module, and no external circuits are involved.

Conditions for Running the DTC


image This diagnostic runs one time at vehicle ON. image System voltage is greater than 11 V.

image No serial data communication faults.


Conditions for Setting the DTC


The calculated motor speed is greater than 400 RPM different from the measured speed for 3 s within a 5 s window.

Actions Taken When the DTC Sets


image DTC P1E4A is a Type A DTC. image DTC P1E4B is a Type A DTC. image Propulsion will be disabled.

Conditions for Clearing the DTC


image DTC P1E4A is a Type A DTC. image DTC P1E4B is a Type A DTC.

Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P0562 or P0563 is not set.

image If any of the DTCs are set

Refer to DTC B1325, B1330, B1517, C0800, C0899, C0900, C12E1, C12E2, P0561-P0563, P1A0C, P1A0D, or P1EFC .

image If none of the DTCs are set

3. Verify DTC P1E4A or P1E4B is not set.

image If any of the DTCs are set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set.

3. All OK

image If none of the DTCs are set

4. All OK


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup.

DTC P1F00: AUXILIARY TRANSMISSION FLUID PUMP INVERTER TEMPERATURE SENSOR CIRCUIT ERRATIC

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P1F00

Auxiliary Transmission Fluid Pump Inverter Temperature Sensor Circuit Erratic

Circuit/System Description

This is an internal fault detection of the power inverter module, often referred to as the drive motor generator power inverter module. This fault is handled inside the power inverter module, and no external circuits are involved.

Conditions for Running the DTC


image The vehicle is ON or the module is awake.

image The module has been awake for more than 10 minutes.


Conditions for Setting the DTC


The inverter phase temperature sensor signal is intermittent.

Actions Taken When the DTC Sets DTC P1F00 is a Type B DTC. Conditions for Clearing the DTC DTC P1F00 is a Type B DTC. Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC P1F00 is not set.

image If the DTC is set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

3. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set

4. All OK.

image If the DTC is not set

3. All OK.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup.

DTC P1F63-P1F65: HYBRID/EV SYSTEM VOLTAGE DISCHARGE CIRCUIT

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


DTC Descriptor


DTC P1F63

Hybrid/EV System Voltage Discharge Circuit Performance

DTC P1F64

Hybrid/EV System Voltage Discharge Circuit Low Voltage

DTC P1F65

Hybrid/EV System Voltage Discharge Circuit High Voltage

Circuit/System Description


This is an internal fault detection of the power inverter module, often referred to as the drive motor generator power inverter module. This fault is handled inside the power inverter module, and no external circuits are involved.

Conditions for Running the DTC


P1F63

image High voltage as measured by the power inverter module prior to commanding discharge is greater than 330 V. image The high voltage main contactors are commanded OPEN.

image High voltage as measured by the power inverter module after discharge completes is less than 200 V. image Drive motor speeds are less than 200 RPM.

P1F64 or P1F65

The vehicle is ON or the module is awake.

Conditions for Setting the DTC


DTC P1F63

The high voltage as measured by the power inverter module does not decrease by 20 V or greater within 0.1 seconds of commanding the discharge circuit ON.

DTC P1F64

The module internal diagnostic circuit detects the discharge resistor circuit is OPEN.

DTC P1F65

The module internal diagnostic circuit detects the discharge resistor circuit is shorted.

Actions Taken When the DTC Sets

DTCs P1F63, P1F64, and P1F65 are Type A DTCs.

Conditions for Clearing the DTC


DTCs P1F63, P1F64, and P1F65 are Type A DTCs.

Diagnostic Aids


Low 12 V system voltage may cause one or more of these DTCs to set.

Reference Information


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle ON.

2. Verify DTC B1325, B1330, B1517, C0800, C0899, C0900, C12E1, C12E2, P0561-P0563, P1A0C, P1A0D, or

P1EFC is not set.

image If any of the DTCs are set

Refer to DTC B1325, B1330, B1517, C0800, C0899, C0900, C12E1, C12E2, P0561-P0563, P1A0C, P1A0D, or P1EFC .

image If none of the DTCs are set

3. Verify DTC P1F63, P1F64, or P1F65 is not set.

image If any of the DTCs are set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

3. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC does not set

4. All OK.

image If none of the DTCs are set

4. All OK.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup.

DTC P2797: AUXILIARY TRANSMISSION FLUID PUMP PERFORMANCE

Diagnostic Instructions

image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptor


DTC P2797

Auxiliary Transmission Fluid Pump Performance

Circuit/System Description


The power inverter module, often referred to as the drive motor generator power inverter module, contains three motor control modules and the hybrid/EV powertrain control module 1. Two of the motor control modules operate their respective drive motor based upon power inverter module commands. The third motor control module controls the auxiliary transmission fluid pump. The hybrid/EV powertrain control module 1 and the motor control modules share the power inverter module ignition voltage circuit, battery voltage circuits and chassis ground.

Conditions for Running the DTC


image The vehicle is ON.

image The system voltage is greater than 9 V.

image Auxiliary transmission fluid pump speed is greater than 5 RPM.


Conditions for Setting the DTC


The actual auxiliary transmission fluid pump speed is not within a calibrated threshold of the commanded speed.

Action Taken When the DTC Sets


image DTC P2797 is a Type A DTC.

image The power inverter module requests the hybrid/EV powertrain control module 2 to open the high voltage contactor relays.


Conditions for Clearing the DTC DTC P2797 is a Type A DTC. Diagnostic Aids

image Usually, other hybrid/EV powertrain or motor control module DTCs set along with DTC P2797. Always diagnose other DTCs before addressing this DTC.

image This DTC may set if the vehicle is run out of fuel while driving.

image This DTC may be set if the high voltage contactors open while the Auxiliary Transmission Fluid Pump has been commanded on using the Scan Tool.

image This DTC may be set if the transmission fluid gets too hot. Causes of transmission overheating include transmission fluid level that is either too low or too high.


Reference Information


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification

1. Verify that no other hybrid/EV powertrain or motor control module DTC is set.

image If any of the DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

image If none of the DTCs are set


NOTE: Fluid level that is either too high or too low can result in overheating.


2. Verify the transmission fluid level and condition is correct and inspect for other causes of transmission overheating. Refer to Transmission Fluid Level and Condition Check , and Transmission Overheats .

image If a condition was found

Repair as necessary.

image If a condition was not found

3. Verify DTC P2797 is not set.

image If the DTC is set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.

2. Verify the DTC does not set. image If the DTC sets.

1. Replace the G5 Transmission Fluid Pump - Electric/Auxiliary.

2. Verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module.

image If the DTC is not set

4. All OK.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

image Refer to Automatic Transmission Fluid Pump and Fluid Filter Removal G5 Transmission Fluid Pump - Electric/Auxiliary, often referred to as the A/Trans Aux Fluid Pump Motor, replacement

image Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming, and setup

DTC P3260: INTERNAL CONTROL MODULE DRIVE MOTOR CONTROL PERFORMANCE

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


DTC Descriptor


DTC P3260

Internal Control Module Drive Motor Control Performance

Circuit/System Description


The hybrid/EV powertrain control module 1 monitors for the engine speed and drive motor torque to go below calibrated limits when the transmission is shifted into Neutral. The hybrid/EV powertrain control module 1 is part of the drive motor generator power inverter module and is not serviced separately.

Conditions for Running the DTC


image Automatic transmission manual shift shaft is in Neutral.

image No Vehicle Speed DTCs or P1824, P182A-P182F, P1838-P1841, P18B5-P18BA, P18BC, P18BF, P18C0,

P18C2, or P18C3 internal mode switch DTCs are set. image Vehicle speed is less than 3 MPH (5 km/h).

Conditions for Setting the DTC


NOTE: There is a running calibration change for model year and a service release for model year 2016. Re-program the controller first and then check the following conditions.


Either of the following conditions is detected 33 seconds after the Conditions for Running the DTC have been met: image Drive Motor A torque is greater than 4.

OR

image Engine speed is greater than 200 RPM.


Action Taken When the DTC Sets DTC P3260 is a Type A DTC. Conditions for Clearing the DTC DTC P3260 is a Type A DTC. Reference Information Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information.

Circuit/System Verification


1. Verify DTCs that inhibit Autostop operation, or stuck clutch DTCs P07A3 or P07A5, or pressure controls solenoid DTCs P0960, P0962, or P0963 are not set.

image If any of the DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

image If none of the DTCs are set

2. Verify DTC P3260 is not set.

image If the DTC is set

1. Verify the T6 Power Inverter Module has the latest calibration in Calibration Information.

image If the T6 Power Inverter Module does not have the latest calibration, program the T6 power inverter module.

image If the T6 Power Inverter Module has the latest calibration, replace the T6 Power Inverter Module.


NOTE: The transmission must be in Neutral for greater than 33 seconds.


2. Vehicle ON, verify the DTC does not set.

image If the DTC sets, replace the T6 Power Inverter Module. image If the DTC is not set

3. All OK.

image If the DTC is not set

3. All OK.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Refer to Control Module References for T6 Power Inverter Module, often referred to as the Drive Motor Generator Power Inverter Module, replacement, programming and setup

SYMPTOMS - HYBRID CONTROLS


NOTE: The following steps must be completed before using the symptom tables.


1. Perform the Diagnostic System Check - Vehicle before using the symptom tables in order to verify that all of the following are true:

image There are no DTCs set.

image The control modules can communicate via the serial data link.

2. Review the system operation in order to familiarize yourself with the system functions. Refer to the following procedures:

image Drive Motor Power Inverter Module Description and Operation

image High Voltage Monitoring Systems Description image Hybrid Modes of Operation Description

image Drive Motor Battery System Description image Transmission General Description

Visual/Physical Inspection


image Inspect for aftermarket devices which could affect the operation of the Hybrid System. Refer to Checking Aftermarket Accessories .

image Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.


Intermittent


Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List


Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

image DC Power Conversion Test

image Drive Mode Select Switch Malfunction

DRIVE MODE SELECT SWITCH MALFUNCTION

Diagnostic Instructions


image Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. image Review Strategy Based Diagnosis for an overview of the diagnostic approach.

image Refer to Diagnostic Procedure Instructions to provide an overview of each diagnostic category.


Diagnostic Fault Information



Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Signal

Stuck in Normal Mode

Stuck in Normal Mode

-

P1762

Ground

-

Stuck in Normal Mode

-

P1762

Circuit/System Description


The body control module (BCM) monitors the state of the drive mode select switch. The BCM sends the drive mode select switch signal message to the ECM over the serial data circuits. The ECM uses this message to determine the following driver selected mode of operation:

image Normal image Sport

image Mountain

image Hold, some models


Diagnostic Aids

image Under normal operation, when the DRIVE MODE button is pressed, the drive mode select switch closes and the scan tool BCM Drive Mode Select Switch parameter displays Active. When the DRIVE MODE button is released, the switch opens, the parameter displays Inactive, and the driver information center display is updated.

image When attempting to run or set ECM serial data DTCs, run the vehicle in propulsion system active mode for at least 1 minute, and then shut the vehicle off for 30 seconds. Following this procedure will allow for a complete ECM shutdown.


Reference Information


Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Electrical Information Reference

image Circuit Testing

image Connector Repairs

image Testing for Intermittent Conditions and Poor Connections image Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification


1. Run the vehicle in propulsion system active mode for 1 minute, then vehicle OFF for 30 seconds.

2. Verify the scan tool BCM Drive Mode Select Switch parameter displays Inactive when DRIVE MODE button is not pressed and Active when pressed and held.

image If the BCM Drive Mode Select Switch parameter does not indicate the correct status

Refer to Circuit/System Testing.

image If the BCM Drive Mode Select Switch parameter indicates the correct status

3. All OK.


Circuit/System Testing


1. Vehicle OFF and all vehicle systems OFF, disconnect the harness connector at the S126 Drive Mode Select Switch. It may take up to 2 minutes for all vehicle systems to power down.

2. Test for less than 10 Ω between the ground circuit terminal 4 and ground

image If 10 Ω or greater

1. Vehicle OFF.

2. Test for less than 2 Ω in the ground circuit end to end.

image If 2 Ω or greater, repair the open/high resistance in the circuit.

image If less than 2 Ω, repair the open/high resistance in the ground connection.

image If less than 10 Ω

3. Vehicle ON.

4. Verify the scan tool BCM Drive Mode Select Switch parameter displays Inactive.

image If the parameter does not display Inactive

1. Vehicle OFF, disconnect the X6 harness connector at the K9 BCM.

2. Test for infinite resistance between the signal circuit terminal 22 and ground. image If less than infinite resistance, repair the short to ground on the circuit. image If infinite resistance, replace the K9 BCM.

image If the parameter displays Inactive

5. Install a 3 A fused jumper wire between the signal circuit terminal 1 and the ground circuit terminal 4.

6. Verify the scan tool BCM Drive Mode Select Switch parameter displays Active.

image If the parameter does not display Active

1. Vehicle OFF, remove the jumper wire, disconnect the X6 harness connector at the K9 BCM.

2. Test for less than 2 Ω in the signal circuit end to end.

image If 2 Ω or greater, repair the open/high resistance in the circuit. image If less than 2 Ω, replace the K9 BCM.

image If the parameter displays Active

7. Test or replace the S126 Drive Mode Select Switch.


Component Testing


1. Vehicle OFF, disconnect the harness connector at the S126 Drive Mode Select Switch.

2. Test for infinite resistance between the signal terminal 1 and the ground terminal 4 with the switch in the open position.

image If less than infinite resistance

Replace the S126 Drive Mode Select Switch.

image If infinite resistance

3. Test for less than 2 Ω between the signal terminal 1 and the ground terminal 4 with the switch in the closed position.

image If 2 Ω or greater

Replace the S126 Drive Mode Select Switch.

image If less than 2 Ω

4. All OK.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

image Refer to Control Module References for K9 Body Control Module replacement, programming, and setup image Refer to Radio Control Assembly Replacement for S126 Drive Mode Select Switch replacement

DC POWER CONVERSION TEST

Diagnostic Instructions


image Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle

image Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis

image An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions


Circuit/System Description


The 14 V power module, often referred to as the accessory DC power control module, supplies the energy that flows between the high voltage (360 V) direct current (DC) and low voltage (14 V) DC to charge the 12 V battery and to operate the power accessories. The ECM controls the 14 V power module by supplying 5 V pulse width modulated (PWM) signal through a control circuit. The 14 V power module sends 5 V PWM feedback signal to the ECM through the feedback circuit. The 14 V power module generates more power as the commanded duty cycle increases.

Diagnostic Aids


Using a carbon pile tester is the preferred method to test the 14 V power module. The carbon pile tester can put an increasing load on the system to reach a target current level. If a carbon pile tester is not available, the alternative method is using the scan tool 14 V power module setpoint.

Reference Information


Schematic Reference

Starting and Charging Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Accessory DC Power Control Module Description and Operation

Electrical Information Reference

image Circuit Testing

image Testing for Intermittent Conditions and Poor Connections

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification


1. Vehicle OFF.

2. Measure and record the C1 battery voltage at the C1 battery terminals. The C1 battery voltage should stabilize between 12.4 and 12.8 V within a few minutes of turning the vehicle OFF.

image If not within the specified range

Refer to Battery Inspection/Test .

image If within the specified range

3. Vehicle ON, accessories OFF.

4. Measure and record the C1 battery voltage at the C1 battery terminals. The voltage should be at least 1 V greater than the voltage measured in step 1 but less than 15.6 V.

image If not within the specified range

Refer to Circuit/System Testing.

image If within the specified range

5. All OK.


Circuit/System Testing


NOTE: If a carbon pile tester is available, refer to With Carbon Pile Tester section.

Otherwise, refer to Without Carbon Pile Tester section.


With Carbon Pile Tester

1. Vehicle ON.

2. Verify that no K1 14 V Power Module or B18 Battery Current Sensor DTCs are set that would cause a charging system concern.

image If an applicable DTC is set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

image If no applicable DTCs are set

3. Vehicle OFF.

4. Test for 12.4 V or greater at room temperature across the C1 Battery terminals.

image If not within the specified range

Refer to Battery Inspection/Test .

image If within the specified range

5. Connect a carbon pile tester to the C1 Battery.

6. Vehicle ON, turn all accessories off. Observe the voltage reading on the tester. The voltage should read between 12.6 - 15.5 V.

7. Adjust the carbon pile tester so that the Low - Voltage Battery Current parameter on the 14 V Power Module data list of the Engine Control Module is reading 160 amps.

8. Verify the voltage reading remains between 12.6 - 15.5 V.

image If not within the specified range

Replace the K1 14 V Power Module.

image If within the specified range

9. All OK.

Without Carbon Pile Tester

1. Vehicle ON.

2. Verify that no K1 14 V Power Module or B18 Battery Current Sensor DTCs are set that would cause a charging system concern.

image If an applicable DTC is set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle .

image If no applicable DTCs are set

3. Vehicle OFF.

4. Test for 12.4 V or greater at room temperature across the C1 Battery terminals.

image If not within the specified range

Refer to Battery Inspection/Test .

image If within the specified range

5. Vehicle ON.

6. Verify the scan tool Engine Control Module Ignition 1 Signal parameter continually increases when controlling the Engine Control Module 14 V Power Module Setpoint from 10 - 80% with a scan tool. It may take up to 10 s for the battery voltage to stabilize between each setpoint change.

image If the battery voltage does not continually increase

Replace the K1 14 V Power Module.

image If the battery voltage continually increases

7. All OK.


Repair Instructions


Perform the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for K1 14 V Power Module, often referred to as the Accessory DC Power Control Module, replacement, programming, and setup

REPAIR INSTRUCTIONS

ACCESSORY DC POWER CONTROL MODULE REPLACEMENT

Special Tools


BO-38185 Hose Clamp Pliers Equivalent regional tools: Special Tools Removal Procedure

WARNING: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure will perform the following tasks: image Identify how to disable high voltage.

image Identify how to test for the presence of high voltage.

image Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

Failure to follow the procedures exactly as written may result in serious injury or death.


1. Disable high voltage system. Refer to High Voltage Disabling

2. Remove Rear Compartment Floor Stowage Trim Compartment. Refer to Rear Compartment Floor Stowage Trim Compartment Replacement

3. Disconnect Battery Negative Cable. Refer to Battery Negative Cable Disconnection and Connection

4. Drain the cooling system. Refer to Drive Motor Generator Power Inverter Module Cooling System Draining and Filling


CAUTION: Ensure the cooling system is drained, and hoses are removed prior to disconnecting any electrical connections. Failure to do this may result in damage to the electrical connectors or components. Any damaged electrical connectors or components must be replaced.


image


Fig. 6: Accessory DC Power Control Module, Bolt, Nuts, Coolant Hoses, Clamps And Electrical Connectors

Courtesy of GENERAL MOTORS COMPANY

5. Loosen Clamps (3, 5) (Qty: 2) using BO-38185 pliers

6. Remove Coolant Hoses (Qty: 2)

7. Disconnect Electrical Connectors (2, 4)

8. Remove the battery positive and negative cable nut (APM ground cable) (6).

9. Remove the battery positive and negative cable nut (B+ APM Module to Battery Fuse Block) (7).

10. Remove 2 the accessory dc power control module nuts (1).

11. Remove the accessory dc power control module bolt (8).

12. Remove the accessory dc power control module (9).


Installation Procedure


CAUTION: Ensure that all electrical connections are made before the hoses are connected, and the cooling system is filled. Failure to do this may result in damage to the electrical connectors or components. Any damaged electrical connectors or components must be replaced.

image


Fig. 7: Accessory DC Power Control Module, Bolt, Nuts, Coolant Hoses, Clamps And Electrical Connectors

Courtesy of GENERAL MOTORS COMPANY

1. Install the accessory dc power control module (9).


CAUTION: Refer to Fastener Caution


2. Install the accessory dc power control module bolt (8) and tighten to 22 N.m (16 lb ft).

3. Install 2 the accessory dc power control module nuts (1) and tighten to 22 N.m (16 lb ft).

4. Install the battery positive and negative cable nuts (B+ APM Module to Battery Fuse Block) (7) and tighten to 22 N.m (16 lb ft).

5. Install the battery positive and negative cable nut (APM ground cable) (6) and tighten to 22 N.m (16 lb ft).

6. Connect Electrical Connectors (2, 4)

7. Install Coolant Hoses (Qty: 2)

8. Install Clamps (3, 5) (Qty: 2) using BO-38185 pliers

9. Fill the cooling system. Refer to Drive Motor Generator Power Inverter Module Cooling System Draining and Filling

10. Connect Battery Negative Cable. Refer to Battery Negative Cable Disconnection and Connection

11. Install Rear Compartment Floor Stowage Trim Compartment. Refer to Rear Compartment Floor Stowage Trim Compartment Replacement

12. Enable high voltage system. Refer to High Voltage Enabling

DESCRIPTION AND OPERATION

ACCESSORY DC POWER CONTROL MODULE DESCRIPTION AND OPERATION

Location


The 14 V power module, also called the accessory DC power control module, is located in the rear trunk compartment underneath the floor stowage trim panel. It is attached to the chassis with four fasteners. The 14 V power module is cooled with pre-mixed Dexcool® circulating through a cooling system that is separate from the engine cooling system.

The 14 V power module is an electronic device that takes the place of the generator on a traditional vehicle. On a

hybrid or electric vehicle the 14 V power module converts high voltage (300 V) direct current (DC) to low voltage (12 V) DC for accessory electrical operation and to charge the 12 V battery.

Normally, the 14 V power module only supplies 12 V DC when the vehicle is under a normal drive cycle. However there are certain instances when the vehicle is being charged through a standard wall socket where the 14 V power module operation is required to sustain the 12 V battery.

The 14 V power module is capable of supplying up to 130 Amps of 12 V DC.

Communication and Hosted Diagnostics


The 14 V power module has no internal diagnostic tests and does not communicate over serial data. The engine control module (ECM) monitors and controls the 14 V power module and will report DTCs if a fault is detected.

Circuit Inputs


Inputs to the 14 V power module include the high voltage and 12 V circuits. The 14 V power module also has a pulse width modulated set point input from the engine control module (ECM). This input enables conversion of voltage from high to the desired 12 V output level.

For more information on the 12 V Battery Charging System, refer to Charging System Description and Operation

.

Circuit Outputs


Outputs

The only outputs supported by the 14 V power module are the status feedback circuit to the engine control module (ECM) and 12 V DC which powers the 12 V components in the vehicle and charges the 12 V battery.

Low voltage 12 V cables on the hybrid/EV vehicle do not require unique coloring or servicing procedures.

DRIVE MOTOR POWER INVERTER MODULE DESCRIPTION AND OPERATION

Overview


The power inverter module, often referred to as the drive motor generator power inverter module, converts high voltage direct current (DC) electrical energy to 3-phase alternating current (AC) electrical energy. It is mounted directly to the transmission and is cooled with pre-mixed DEX-COOL® circulating through a cooling system that is separate from the engine cooling system. The hybrid cooling system utilizes a heat exchanger at the front of the vehicle and electric pumps to circulate the coolant. Refer to Hybrid/EV Cooling System Description and Operation .

High Voltage Circuits


Direct Current (DC)

The power inverter module is connected to the positive and negative terminals of the high voltage DC hybrid/EV battery pack. Both of the negative and positive high voltage DC battery poles are electrically isolated from the vehicle chassis by a specific amount of resistance. Each high voltage DC bus is switched ON or OFF by a high voltage, high current contactor relay contained within the hybrid/EV battery pack. All high voltage DC negative and positive DC cables are individually shielded and orange in color to alert the technician to the potential presence of high voltage.

Three Phase Alternating Current (AC)

There two 3-phase motors in the transmission, connected directly to the power inverter module via ring terminals and

A/C connector rods. A single shielded cable connects the auxiliary transmission fluid pump to the power inverter module. This cable contains 3 individual wires that are connected to the 3 phases of the auxiliary transmission fluid pump. The cable is orange in color to alert the technician to the potential presence of high voltage.

Drive Motor Generator Power Inverter Module


Overview

The power inverter module contains 2 motor control modules and the hybrid/EV powertrain control module 1. Two of the motor control modules operate their respective drive motors based upon power inverter module commands. The third motor control module controls the auxiliary transmission fluid pump. The hybrid/EV powertrain control module 1 and the motor control modules share the power inverter module ignition voltage circuit, battery voltage circuits and chassis ground. All four modules are flash-programmable microprocessors.

Hybrid Powertrain Control Module


Location

The hybrid/EV powertrain control module 1 is a non-serviceable, flash-programmable microprocessor contained within the power inverter module.

Operating Functions

The hybrid/EV powertrain control module 1 is the main controller of powertrain operation. The hybrid/EV powertrain control module 1 determines when to perform normal operating modes such as electric mode, extended range mode, and regenerative braking. The hybrid/EV powertrain control module 1 also operates in conjunction with the hybrid/EV powertrain control module 2 to determine when to enable and disable the DC high voltage circuits.

Each motor control module operates the applicable motor based upon hybrid/EV powertrain control module 1 commands.

Communication and Hosted Diagnostics

The hybrid/EV powertrain control module 1 is the host controller for DTC information for the following control modules:

image Drive motor 1 control module image Drive motor 2 control module

image Auxiliary transmission fluid pump control module

These modules diagnose their own operation and determine when a fault condition is present.

The motor control modules and the hybrid/EV powertrain control module 1 exchange information and commands on a serial peripheral interface bus internal communication circuit as well as the hi-speed GMLAN communication circuit.

In the event a hosted module communicates a fault condition, the hybrid/EV powertrain control module 1 will determine if one or more operating modes are affected and notify the vehicle operator by requesting the MIL illuminate and/or by displaying a message in the Driver Information Center. In addition, the hybrid/EV powertrain control module 1 will store the associated DTC information for retrieval by a scan tool. Some hosted modules may require an ignition cycle to clear certain DTCs from the hybrid/EV powertrain control module 1.

Circuit Inputs

In addition to data parameters, the hybrid/EV powertrain control module 1 directly monitors the following signal circuits:

image Transmission internal mode switch direction and Park/Neutral switch signals image Crankshaft position sensor signal

Motor Control Modules


Location

Both of the drive motors and the auxiliary transmission fluid pump motor are located within the transmission. They are each controlled by their own motor control module; each module is a flash-programmable micro-processor. Each motor control module is contained within the power inverter module. Also contained within the power inverter module is the hybrid/EV powertrain control module 1 micro-processor.

Operating Functions

The motor control modules operate their respective motors based upon hybrid/EV powertrain control module 1 commands. Each motor control module controls the speed, direction, and output torque of its respective drive motor or the auxiliary transmission fluid pump through the sequencing actuation of high current switching transistors called insulated gate bipolar transistors.

Communication and Hosted Diagnostics

In addition to the internal serial peripheral interface bus communication circuit that the hybrid/EV powertrain control module 1 and each motor control module control use to communicate, the motor control modules also communicate on the hi-speed and hybrid serial data circuits. The motor control modules do not store their own Diagnostic Trouble Code (DTC) information. The hybrid/EV powertrain control module 1 will store motor control module associated DTC information for retrieval by a scan tool. The scan tool can communicate directly with each motor control module in order to retrieve data parameters only.

Circuit Inputs

In addition to data parameters, each motor control module monitors its respective motor for voltage, current, speed, direction and temperature. Additionally, the motor control module monitors the insulated gate bipolar transistor components for temperature and proper operation. Some of the motor control module operation data is shared with the hybrid/EV powertrain control module 1.

Circuit Outputs

Each motor control module controls its respective insulated gate bipolar transistor driver board that in-turn controls each motor. The motors operate using 3 - phase AC electricity, and are connected directly to the power inverter module via ring terminals and A/C connector rods. A single shielded cable connects the auxiliary transmission fluid pump to the power inverter module. This cable contains 3 individual wires that are connected to the 3 phases of the auxiliary transmission fluid pump. The cable is orange in color to alert the technician to the potential presence of high voltage.

ELECTROMAGNETIC COMPATIBILITY DESCRIPTION

Overview


Vehicles are typically subject to certain legal requirements that limit the amount of electromagnetic interference (EMI) that can be generated by the vehicles electronic devices. Additionally, the electronic devices within the vehicle must be able to withstand a certain amount of EMI without affecting their operation. EMI is generated whenever electrical current flows through a circuit. The amount of EMI generated, or amplitude, is usually dependent upon the amount of current flow, amperage, and the on-off pattern of current flow through the circuit, frequency. The EMI requirements are generally referred to as electromagnetic compatibility.

There are many ways of ensuring the vehicle meets electromagnetic compatibility requirements. These include:

image Adding capacitors and resistors to certain electrical circuits

image Regulating the frequency at which a component may operate image Shielding the wires, cables and components

Circuit Design


The power inverter module, often referred to as the drive motor generator power inverter module, and the 14 V power module, often referred to as the accessory DC power control module, each contain filter capacitors connected to the high voltage circuits. These capacitors are necessary to reduce the voltage spikes that occur as a result of the switching of current On and Off. Reducing voltage spikes reduces EMI. The frequency of current switching is also closely regulated. Too high a frequency can cause an increase in EMI generation.

Wiring/Cable Design


Different types of wire/cable shielding methods are utilized in the vehicle. Common types of circuit shielding include twisted-pair and internal braid or foil. Twisted pair is typically used in circuits such as serial data circuits. The wire pair is twisted together at a particular turns-per-length ratio. Shielded cable is utilized for all other circuits requiring either protection from external EMI or to reduce EMI radiation of the cable itself into other nearby components or circuits.

High Voltage Cable


image 300-Volt Battery Positive and Negative Cable

image Air Conditioning and Drive Motor Battery Cooling Compressor

The high voltage cables utilize internal braid shielding. Typically, both ends of the internal braid shield are attached to chassis ground. All of the high voltage, internally shielded cables are grounded at their cable end attachment points. Mounting blocks, where used, perform the shield to chassis ground connection. Connection points not serviced with a mounting block utilize a separate ring terminal.

Low and Intermediate Voltage Wiring


The signal circuits for the transmission sensors utilize shielding protection. The drive motor position sensor circuits utilize internal foil shielding. The wiring harness external of the transmission assembly is connected to chassis ground with ring terminals at the power inverter module. The internal transmission wiring harness is attached to chassis ground with a ring terminal at the valve body assembly.

The auxiliary transmission fluid pump 3 phase cables utilize internal foil shielding. The wiring harness shield is connected to chassis ground within the power inverter module.

Component Shielding


Certain components utilize their structure to effectively shield EMI. Metal covers, chassis grounded metal cases and electro-magnetically conductive gaskets may all be part of a components electromagnetic compatibility design.

Shielding Loss


A loss of proper shielding may result in poor AM band radio reception and/or incorrect sensor circuit readings depending upon the location of the shield loss. Damage that has penetrated to the insulated conductor of high voltage cables is not repairable. Certain Low and Intermediate voltage shielded wiring harnesses may be repairable. Refer to Wiring Repairs , and Splicing Twisted or Shielded Cable .

HIGH VOLTAGE MONITORING SYSTEMS DESCRIPTION

The hybrid/EV system monitors several high voltage components for attempted access. Additionally, a minimum amount of isolation resistance is maintained at all times between both negative and positive poles of the hybrid/EV battery and the vehicle chassis. Microprocessors internal to the power inverter module, often referred to as the drive motor generator power inverter module, and the hybrid/EV powertrain control module 2 monitor the hybrid/EV system for access and loss of isolation.

High Voltage Interlock Circuit


The high voltage interlock circuit is a wire loop that passes through certain high voltage components. The high voltage interlock circuit is used to determine if access to high voltage components is being attempted. The opening of these high voltage components causes the high voltage interlock circuit to open. The hybrid/EV system may react to the loss of high voltage interlock circuit continuity by opening the high voltage contactor relays and discharging the high voltage capacitors. The high voltage interlock circuit signal is generated by the hybrid/EV powertrain control module 2. The high voltage interlock circuit status is monitored by the hybrid/EV powertrain control module 2.

High Voltage DC Chassis Isolation


Vehicles equipped with high voltage storage and propulsion capability are designed with the high voltage circuits isolated from the vehicle chassis. If either the positive or negative high voltage Direct Current (DC) circuits or any of the high voltage Alternating Current (AC) phase circuits lose this isolation to the vehicle chassis, one or more diagnostic trouble codes (DTCs) may set. Additional information can be found in Hybrid/EV System High Voltage Isolation Description .

HYBRID MODES OF OPERATION DESCRIPTION

Vehicle Operating Modes Description


This vehicle is an Extended Range Electric Vehicle. It uses an electric propulsion system to drive the vehicle at all times. Electricity is the vehicle's primary source of energy, while gasoline is the secondary source.

The vehicle has two modes of operation - Electric and Extended Range. In both modes, the vehicle is propelled by the electric motors that are internal to the transmission. Electrical energy is converted into mechanical energy to drive the wheels and propel the vehicle. The vehicle's performance remains the same in either mode.

This overview is not a comprehensive list of all aspects of the Extended Range Electric Vehicle. Refer to Automatic Transmission 5ET50 Electronic Component Description for information regarding transmission operation. More detailed and comprehensive information is also available through the dealer training program.

Electric Mode


Electric Mode is the primary mode of operation for this vehicle. While in Electric mode, the vehicle is powered by electrical energy stored in the high voltage hybrid/EV battery pack. The vehicle can operate in this mode for a range of up to 40 - 80 km (25 - 50 miles) until the battery has reached a low state of charge.

Extended Range Mode


When the vehicle reaches the end of its electric range, it switches to Extended Range Mode. In this mode, electricity is produced by the drive motor, which is driven by the internal combustion engine (ICE). This secondary source of electric power extends the vehicle range. Operation will continue in extended range mode until the vehicle can be plugged in to recharge the hybrid/EV battery pack and restore electric mode.

The hybrid/EV battery pack will continue to provide some power and work together with the ICE to provide peak performance when it is required, such as driving up a steep incline or during high acceleration. The hybrid/EV battery pack will not be recharged while in extended range mode.

Internal Combustion Engine (ICE) Starting


This vehicle does not use a 12 V starter motor to crank the ICE. A much more powerful 300 V motor, drive motor 1, located within the transmission is utilized to crank the ICE. Drive motor 1 can rotate the ICE to operating speed within just a few hundred milliseconds. This allows near-instant starting of the ICE.

The vehicle's on-board computers determine when the ICE needs to run. Some of the normal vehicle conditions that force the ICE to run are:

image The hybrid/EV battery pack has a low state of charge image The hood is open or not completely latched

image The ICE is needed to maintain the hybrid/EV battery pack temperature image The ICE needs to run for maintenance

image Extremely low ambient temperatures

When the hood is open, the ICE will run without turning off. The hybrid/EV battery pack is neither charged nor discharged when this occurs.

Some hybrid/EV battery pack faults will cause the ICE to run without turning off.

Service Mode


Service Mode is available for service and diagnostics and to verify the proper operation of the MIL and may be required for emission inspection purposes. With vehicle OFF, and the brake pedal not applied, pressing and holding the POWER button for more than 5 seconds will place the vehicle in Service Mode. The instruments and audio systems will operate as they do in ON, but the vehicle will not be able to be driven. The propulsion system will not start in Service Mode.

Engine Unavailable


If the vehicle runs out of fuel, or the power inverter module has detected the ICE will not start due to a malfunction, the vehicle can continue to be driven in Electric Mode.

Propulsion Power is Reduced


This message comes on any time the battery is reporting less than 35 kW of power available for any reason. This message will NOT require service by a dealer unless the Propulsion Power Reduced message is accompanied by a Malfunction Indicator Lamp.

image This message may appear while severe highway grades, even in Mountain Mode.

image This message may appear on start up if the battery is at or below -15°C (5°F), possibly from the vehicle sitting outside unplugged in the winter.

image This message may appear in Normal or Sport mode in non-mountainous terrain, typically with aggressive driving. When this message appears with aggressive driving, the battery reserve has been depleted.


Maintenance Modes


Engine Maintenance Mode

Engine Maintenance Mode runs the engine to keep it in good working condition when the vehicle has been operated in Electric Mode only for a prolonged period. Engine Maintenance Mode will run the ICE, even if the hybrid/EV battery pack state of charge is sufficient to operate the vehicle in Electric Mode.

Fuel Maintenance Mode

When only Electric Mode is used for a prolonged period, Fuel Maintenance Mode will run the ICE to use up old fuel. The ICE will run until enough fresh fuel is added or a low fuel level is detected. During Fuel Maintenance Mode the ICE may cycle on and off.

Regenerative Braking


When the vehicle is coasting or braking the power inverter module may operate the drive motor as a generator in an Electrical Generation Mode. Operating as an electrical generator, the drive motor exerts a driveline load that helps to slow the vehicle. The electrical energy that the drive motor creates is transferred by the power inverter module to the hybrid/EV battery pack. Constant communication between the power inverter module and the electronic brake control module allows the blending of regenerative braking force with hydraulic braking force.

SPECIAL TOOLS AND EQUIPMENT

SPECIAL TOOLS



Illustration

Tool Number/Description


image


EL-48569 Terminal Covers


image

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