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FASTENER SPECIFICATIONS

BRAKES

Antilock Brake System - Volt

Reusable Threaded Fastener Tightening Specifications

SCHEMATIC WIRING DIAGRAMS

ANTILOCK BRAKE SYSTEM WIRING SCHEMATICS

Power, Ground, Data Communication and Brake Pedal Control

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

Vehicle Stability

Fig. 2: Vehicle Stability

Courtesy of GENERAL MOTORS COMPANY

Wheel Speed Signals

Fig. 3: Wheel Speed Signals

Courtesy of GENERAL MOTORS COMPANY

DIAGNOSTIC INFORMATION AND PROCEDURES

DTC B2745: TRACTION CONTROL SWITCH CIRCUIT

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC B2745

Traction Control Switch Circuit

For symptom byte information refer to Symptom Byte List

Diagnostic Fault Information

Circuit/System Description

The body control module monitors the electronic stability control switch. When the electronic stability control switch is pressed once, the body control module will request the electronic brake control module via serial data to disable the traction control. When the electronic stability control switch is pressed and held for five seconds, the body control module will request the electronic brake control module to disable the stability control. The Electronic Brake Control Module will request the Instrument Cluster to turn the Traction Control Off and Stability Control Off indicator ON to notify the driver of the deactivation.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

The body control module detects a short to ground on the signal circuit.

Action Taken When the DTC Sets

The body control module ignores the traction control switch signal input.

Conditions for Clearing the DTC

When the condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.

2. Verify the Instrument Cluster indicators listed below turn ON and OFF when commanding the All Indicators ON and OFF with a scan tool.

Traction Control Off indicator Stability Control Off indicator

Traction/stability Control indicator

If any indicator does not turn ON and OFF

Replace the P16 Instrument Cluster.

If all indicators turn ON and OFF

3. Verify the scan tool Body Control Module, Traction Control Switch parameter changes between Active and Inactive while pressing and releasing the S48E Multifunction Switch-Instrument Panel.

If the parameter does not change

Refer to Circuit/System Testing.

If the parameter changes

4. All OK.

Circuit/System Testing

NOTE: Circuit/System Verification must be performed before Circuit/System Testing.

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S48E Multifunction Switch-Instrument Panel. 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 1 and ground.

If 10 Ω or greater

1. Ignition OFF.

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

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

If less than 2 Ω, repair the open/high resistance in the ground connection.

If less than 10 Ω

3. Ignition ON.

4. Verify the scan tool Body Control Module, Traction Control Switch parameter is Inactive.

If Active

1. Ignition OFF, disconnect the X2 harness connector at the K9 Body Control Module.

2. Test for infinite resistance between the signal circuit terminal 14 and ground.

If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K9 Body Control Module.

If Inactive

5. Install a 3 A fused jumper wire between the signal circuit terminal 4 and ground.

6. Verify the scan tool Traction Control Switch parameter is Active.

If Inactive

1. Ignition OFF, disconnect the X2 harness connector at the K9 Body Control Module, ignition ON.

2. Test for less than 1 V between the signal circuit and ground.

If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V.

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

If 2 Ω or greater, repair the open/high resistance in the circuit. If less than 2 Ω, replace the K9 Body Control Module.

If Active

7. Test or replace the S48E Multifunction Switch-Instrument Panel.

Component Testing

1. Ignition OFF, disconnect the harness connector at the S48E Multifunction Switch-Instrument Panel.

2. Test for infinite resistance between the signal terminal 4 and the ground terminal 1 with the switch in the open position.

If less than infinite resistance

Replace the S48E Multifunction Switch-Instrument Panel.

If infinite resistance

3. Test for less than 2 Ω between the signal circuit terminal 4 and the ground terminal 1 with the switch in the closed position.

If 2 Ω or greater

Replace the S48E Multifunction Switch-Instrument Panel.

If less than 2 Ω

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Vehicle Stability Control System Switch Replacement

Control Module References for Body Control Module or Instrument Cluster replacement, programming and setup.

DTC C0010-C0019, C001C, OR C001D: INLET CONTROL/OUTLET CONTROL

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C0010

Left Front Inlet Control

DTC C0011

Left Front Outlet Control

DTC C0014

Right Front Inlet Control

DTC C0015

Right Front Outlet Control

DTC C0018

Left Rear Inlet Control

DTC C0019

Left Rear Outlet Control

DTC C001C

Right Rear Inlet Control

DTC C001D

Right Rear Outlet Control

Circuit/System Description

The solenoid valves are integral parts of the brake pressure modulator valve assembly. The brake pressure modulator valve assembly contains an inlet solenoid valve and an outlet solenoid valve for each wheel. The solenoid valves are not engaged during normal system operation. When the ABS, electronic brake force distribution or traction control/stability control operation is required the electronic brake control module turns the required solenoid valves ON.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

The electronic brake control module detects a short to ground or open/high resistance on the internal control circuit.

Action Taken When the DTC Sets

The electronic brake control module disables the ABS, the electronic brake force distribution and the traction control/stability control for the duration of the ignition cycle.

The ABS warning indicator turns ON.

The traction control/stability control-active indicator turns ON. The brake force distribution indicator turns ON.

Conditions for Clearing the DTC

A current DTC clears when the diagnostic runs and passes.

The electronic brake control module will turn OFF the indicators and enable the system functions in the next ignition cycle.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

1. Ignition ON/Vehicle in Service mode.

2. Verify that DTC C0010, C0011, C0014, C0015, C0018, C0019, C001C or C001D are not set while operating the vehicle under normal driving conditions.

If any of the DTCs are set

1. Vehicle OFF and all vehicle systems OFF, disconnect the harness connector at the K17 Electronic Brake Control Module. It may take up to 2 min for all vehicle systems to power down.

2. Test for less than 10 Ω between the ground circuit terminals listed below and ground: Terminal 14

Terminal 46

If 10 Ω or greater

Repair the open/high resistance in the circuit.

If less than 10 Ω

3. Replace the Q5 Brake Pressure Modulator

If none of the DTCs are set

3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for electronic brake control module replacement, programming and setup.

DTC C0051: STEERING WHEEL ANGLE SENSOR

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C0051

Steering Wheel Angle Sensor

For symptom byte information refer to Symptom Byte List

Circuit/System Description

The steering wheel angle sensor is integrated into the steering gear assembly. The steering wheel angle sensor identifies the position and direction of the steering wheel rotation.

The electronic brake control module receives high speed serial data inputs from the steering angle sensor identifying the position and direction of the steering wheel rotation. The electronic brake control module utilizes this signal to calculate the driver intended driving direction.

Conditions for Running the DTC

Vehicle ON or Vehicle in Service Mode.

Conditions for Setting the DTC

C0051 66

The steering wheel angle sensor signal rate of change is to fast greater than 30°.

C0051 4B

The steering wheel angle sensor signal is found to not be calibrated.

C0051 1A

The steering wheel angle sensor signal is above the maximum specification.

Action Taken When the DTC Sets

The traction/stability control indicator turns ON.

A Service Stabile Trak message may displayed on the driver information center. A Service Brake Assist message may displayed on the driver information center.

A Service Power Steering Drive with Care message may displayed on the driver information center.

The electronic brake control module disables the traction control and the electronic stability control for the duration of the ignition cycle.

Conditions for Clearing the DTC

A current DTC clears when the diagnostic runs and passes.

The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Diagnostic Aids

Check and adjust all tires to the stated cold air pressure as identified on the tire placard.

The car should not pull in either direction causing the steering wheel to be off center while driving in a straight line on a level surface.

Confirm that all tires are of the proper size and matching brands. If a mis-sized or non-matching brand tire is present, inform the customer that in order for the vehicle stability enhanced system to function normally, tires need to be a uniform size and rolling diameter.

Inspect the serial data circuits and connections at the power steering control module and the electronic brake control module. They should be free from sources of electromagnetic interference and the connections should be clean and tight.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Vehicle in Service Mode.

2. With a scan tool check the Power Steering Control Module for any DTCs.

If any DTCs are present in the Power Steering Control Module

Refer to Diagnostic Trouble Code (DTC) List - Vehicle in Power Steering Diagnostic Information and Procedures.

If there are no DTCs present in the Power Steering Control Module

1. With a scan tool check to see if DTCs U0126, U0130, or U0130 are set.

If DTCs U0126, U0130, or U0131 are set

Refer to DTC U0100-U02FF

If DTCs U0126, U0130, and U0130 are not set

2. With a scan tool check to see if DTCs DTC C0500-C0504, C0506-C0510, C050A, C050C-C050F, or C0512-C0516 are set in the Electronic Brake Control Module

If DTCs C0500-C0504, C0506-C0510, C050A, C050C-C050F, or C0512-C0516 are set in

the Electronic Brake Control Module

Refer to Diagnostic Trouble Code (DTC) List - Vehicle

If DTCs C0500-C0504, C0506-C0510, C050A, C050C-C050F, or C0512-C0516 are not

set in the Electronic Brake Control Module

3. Perform the Steering Wheel Angle Sensor Centering procedure.

If the Steering Angle Sensor Centering procedure corrected the DTC

Proceed to step 6

If the Steering Angle Sensor Centering procedure did not correct the DTC

4. Replace the steering gear assembly

If steering gear assembly replacement corrected the DTC

Proceed to step 6

If steering gear assembly replacement did not correct the DTC

5. Replace the K17 Electronic Brake Control Module.

6. All OK

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Electric Belt Drive Rack and Pinion Steering Gear Replacement

Control Module References for module replacement, programming and setup.

DTC C006B: STABILITY SYSTEM ACTIVE TOO LONG

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C006B

Stability System Active Too Long

Circuit/System Description

The electronic brake control module activates the stability system depending on steering angle and multi-axis acceleration sensor input. When the traction control or stability control operation is required the EBCM turns the required solenoid valves ON.

The electronic brake control module receives high speed serial data inputs from the steering angle sensor and multi-axis sensor, that identify the position and direction of the steering wheel rotation as well as vehicle yaw and lateral movement. The electronic brake control module utilizes these signal to calculate the driver intended driving direction.

The steering wheel angle sensor is integrated into the steering gear assembly. The multi-axis sensor is located internally into the inflatable restraint and sensing diagnostic module.

Conditions for Running the DTC

Ignition ON

Stability control is active.

Conditions for Setting the DTC

Stability control is active for more than 15 s.

Action Taken When the DTC Sets

The EBCM disables the traction control and stability control for the duration of the ignition cycle. The traction control/stability control-active indicator turns ON.

Conditions for Clearing the DTC

A current DTC clears when the diagnostic runs and passes.

The EBCM will turn OFF the indicators and enable the system functions in the next ignition cycle.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Diagnostic Aids

Inspect the serial data circuits and connections at the power steering control module and the electronic brake control module. They should be free from sources of electromagnetic interference and the connections should be clean and tight.

Circuit/System Verification

1. Vehicle in Service Mode.

2. With a scan tool check the Power Steering Control Module for any DTCs.

If any DTCs are present in the Power Steering Control Module

Refer to Diagnostic Trouble Code (DTC) List - Vehicle in Power Steering Diagnostic Information and Procedures.

3. Verify that the steering gear assembly is not incorrectly installed.

If the steering gear assembly is installed incorrectly

Refer to Electric Belt Drive Rack and Pinion Steering Gear Replacement

If the steering gear assembly is installed correctly

4. Perform the Steering Wheel Angle Sensor Centering procedure.

If the Steering Angle Sensor Centering procedure corrected the DTC

Proceed to step 7

If the Steering Angle Sensor Centering procedure did not correct the DTC

5. Verify that the inflatable restraint and sensing diagnostic module is installed correctly.

If inflatable restraint and sensing diagnostic module is not installed correctly

Refer to Airbag Sensing and Diagnostic Module Replacement

If inflatable restraint and sensing diagnostic module is installed correctly

6. Replace the K17 Electronic Brake Control Module.

7. All OK

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Electric Belt Drive Rack and Pinion Steering Gear Replacement

Control Module References for module replacement, programming and setup.

DTC C0186, C018B, C0196, C019B, C027E, OR C0287 (WITH UGN): LATERAL ACCELERATION/LONGITUDINAL ACCELERATION/YAW RATE SIGNALS

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C0186

Lateral Acceleration Sensor Signal

DTC C018B

Lateral Acceleration Signals 1-2 Not Plausible

DTC C0196

Yaw Rate Signal

DTC C019B

Yaw Rate Signals 1-2 Not Plausible

DTC C027E

Longitudinal Acceleration Signals 1-2 Not Plausible

DTC C0287

Longitudinal Acceleration Sensor Signal Symptom Byte Information: Symptom Byte List Diagnostic Fault Information

Circuit/System Description

The yaw rate, lateral acceleration and longitudinal acceleration sensors are combined into one multi-axis acceleration sensor, external to the electronic brake control module. The electronic brake control module supplies ignition voltage to the multi-axis acceleration sensor. The multi-axis acceleration sensor communicates with the electronic brake control module via serial data. The electronic brake control module activates the ABS, the traction control and the stability control depending on the multi-axis acceleration sensor input.

Conditions for Running the DTC

Ignition ON begins the initialization of the brake system power-up self test.

Drive the vehicle at speeds greater than 16 km/h (10 MPH) to complete the active brake system test.

Conditions for Setting the DTC

C0186 00 or C018B 5A

The lateral acceleration signal is out of the specified range.

C0186 5A

The lateral acceleration signal is not plausible with the yaw rate signal, steering angle signal and vehicle speed.

C0186 71

The electronic brake control module received an invalid lateral acceleration signal. An open/high resistance is detected on the multi-axis acceleration ground circuit.

A short to ground or open/high resistance is detected on the multi-axis acceleration ignition circuit.

C0196 00 or C019B 5A

The yaw rate signal is out of the specified range.

C0196 5A

The yaw rate signal offset is out of the specified range.

The yaw rate signal is not plausible with the lateral acceleration signal, the steering angle signal and the vehicle speed.

C0196 71

A short to ground or open/high resistance is detected on the ignition circuit.

The electronic brake control module received an invalid lateral acceleration signal. An open/high resistance is detected on the multi-axis acceleration ground circuit.

C027E 5A

The longitudinal acceleration signal is not plausible.

C0287 4B

The longitudinal acceleration sensor is not calibrated.

C0287 5A

The longitudinal acceleration signal is not plausible with the vehicle speed.

C0287 71

An open/high resistance is detected on the multi-axis acceleration ground circuit.

The electronic brake control module received an invalid longitudinal acceleration signal.

A short to ground or open/high resistance is detected on the multi-axis acceleration ignition circuit.

Action Taken When the DTC Sets

The adaptive cruise control is inhibited.

The traction control Off indicator turns ON.

The traction/stability control indicator turns ON.

A Traction Control Off message may be displayed. A Service Stabilitrak message may be displayed.

The electronic brake control module disables the traction control and stability control for the duration of the ignition cycle.

Conditions for Clearing the DTC

The DTC clears when the diagnostic runs and passes.

The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

1. Ignition ON.

2. Verify DTC C0186 5A, C018B 5A, C0196 5A, C019B 5A, C027E 5A, C0287 4B, or C0287 5A is not set.

If any of the DTCs are set

1. Perform the Vehicle Yaw Sensor Learn (with UGN)Vehicle Yaw Sensor Learn (without UGN)

procedures to complete the learn.

2. Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.

If the DTC sets, replace the K17 Electronic Brake Control Module. If the DTC does not set

3. All OK.

If none of the DTCs are set

3. Verify the B119 Multi-axis Acceleration Sensor is installed correctly.

If loose or incorrect installation

Correct the installation of the component.

If installed correctly

4. Ignition OFF, all vehicle system OFF, and the scan tool disconnected, disconnect the harness connector at

the B119 Multi-axis Acceleration Sensor. It may take up to 2 minutes for all vehicle systems to power down.

5. Test for less than 10 Ω between the ground circuit terminal 6 and ground.

If 10 Ω or greater

1. Ignition OFF.

2. Test for less 2 Ω in the ground circuit end to end.

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

If less than 2 Ω, repair the open/high resistance in the ground connection.

If less than 10 Ω

6. Ignition ON.

7. Verify a test lamp illuminates between the ignition circuit terminal 5 and ground.

If the test lamp does not illuminate

1. Ignition OFF, disconnect the harness connector at the K17 Electronic Brake Control Module.

2. Test for infinite resistance between the ignition circuit and ground.

If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance

3. Test for less than 2 Ω in the ignition circuit end to end.

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

If less than 2 Ω, replace the K17 Electronic Brake Control Module.

If the test lamp illuminates

8. Replace the B119 Multi-axis Acceleration Sensor.

9. Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.

If the DTC sets

Replace the K17 Electronic Brake Control Module.

If the DTC does not set

10. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Vehicle Dynamic Sensor Replacement

Control Module References for Electronic Brake Control Module replacement, programming and setup

DTC C0500-C0504, C0506-C0510, OR C0512-C0516: WHEEL SPEED SENSORS

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C0500

Left Front Wheel Speed Sensor Circuit Open

DTC C0501

Left Front Wheel Speed Sensor Circuit Range Performance

DTC C0502

Left Front Wheel Speed Sensor Short to Ground

DTC C0503

Left Front Wheel Speed Sensor Short to Battery

DTC C0504

Left Front Wheel Speed Sensor Circuit Signal Erratic/Intermittent

DTC C0506

Right Front Wheel Speed Sensor Circuit Open

DTC C0507

Right Front Wheel Speed Sensor Circuit Range Performance

DTC C0508

Right Front Wheel Speed Sensor Short to Ground

DTC C0509

Right Front Wheel Speed Sensor Short to Battery

DTC C050A

Right Front Wheel Speed Sensor Circuit Signal Erratic/Intermittent

DTC C050C

Left Rear Wheel Speed Sensor Circuit Open

DTC C050D

Left Rear Wheel Speed Sensor Circuit Range Performance

DTC C050E

Left Rear Wheel Speed Sensor Short to Ground

DTC C050F

Left Rear Wheel Speed Sensor Short to Battery

DTC C0510

Left Rear Wheel Speed Sensor Circuit Signal Erratic/Intermittent

DTC C0512

Right Rear Wheel Speed Sensor Circuit Open

DTC C0513

Right Rear Wheel Speed Sensor Circuit Range Performance

DTC C0514

Right Rear Wheel Speed Sensor Short to Ground

DTC C0515

Right Rear Wheel Speed Sensor Short to Battery

DTC C0516

Right Rear Wheel Speed Sensor Circuit Signal Erratic/Intermittent

Diagnostic Fault Information

Circuit/System Description

The wheel speeds are detected by active wheel speed sensors and encoder rings. The encoder rings consist of permanent magnets located in the hub. As the wheel spins the magnetic encoder ring rotates and passes by the wheel speed sensor head; which generates a sign wave in the wheel speed sensor. Each wheel speed sensor receives ignition voltage from the electronic brake control module and provides an alternating current square wave signal to the electronic brake control module. The electronic brake control module uses the frequency of the signals to calculate the wheel speeds.

Conditions for Running the DTC

Vehicle On or Vehicle in Service Mode Ignition voltage is greater than 10 V.

Conditions for Setting the DTC

C0500, C0502, C0503, C0506, C0508, C0509, C050C, C050E, C050F, C0512, C0514, C0515

An open or a high resistance is detected on a wheel speed sensor circuit.

A short to ground or an open/high resistance is detected on a wheel speed sensor signal circuit. A short to voltage is detected on a wheel speed sensor signal circuit.

C0501, C0504, C0507, C050A, C050D, C0510, C0513, C0516

The tone ring may be demagnetized Water intrusion in the wiring harness

Incorrectly mounted wheel speed sensor

Debris on the wheel speed sensor or the tone ring

Missing tooth or teeth on the wheel speed sensor tone ring

Air gap between the wheel speed sensor and the tone ring too large

Electrical magnetic interference with the wheel speed sensor harness

Actions Taken when the DTC Sets

The ABS indicator turns ON.

The traction/stability control indicator turns ON.

The Service Brake Assist and Service StabiliTrak messages are displayed on the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Diagnostic Aids

Do not use a magnet to clean the wheel speed sensor magnetic encoder ring.

Inspect the wheel speed sensor magnetic encoder ring for debris or corrosion.

If two or more wheel speed sensors are inoperative, diagnose each wheel speed sensor individually.

If the customer comments that the ABS indicator is ON only during moist environmental conditions (rain, snow, vehicle wash, etc.), inspect the wheel speed sensor wiring for signs of water intrusion.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Test drive the vehicle in a straight line at a speed greater than 20 km/h (13 MPH).

2. Verify all scan tool Wheel Speed Sensor parameters are within 1.6 km/h (1 MPH) of each other.

If any parameter is not within 1.6 km/h (1 MPH) of each other

Refer to Circuit/System Testing.

If each parameter is within 1.6 km/h (1 MPH) of each other

3. All OK.

Circuit/System Testing

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connectors at the appropriate B5 Wheel Speed Sensor and the harness connector at the K17 Electronic Brake Control Module, vehicle in service mode.

2. Test for less than 1 V between the appropriate K17 Electronic Brake Control Module harness connector terminals listed below and ground:

B5LF Wheel Speed Sensor - Left Front - terminal 24 and terminal 7

B5LR Wheel Speed Sensor - Left Rear - terminal 39 and terminal 23

B5RF Wheel Speed Sensor - Right Front - terminal 21 and terminal 26 B5RR Wheel Speed Sensor - Right Rear - terminal 22 and terminal 37 If 1 V or greater

Repair the short to voltage on the circuit.

If less than 1 V

3. Vehicle OFF.

4. Test for infinite resistance between the K17 Electronic Brake Control Module harness connector terminals listed below and ground:

B5LF Wheel Speed Sensor - Left Front - terminal 24 and terminal 7 B5LR Wheel Speed Sensor - Left Rear - terminal 39 and terminal 23

B5RF Wheel Speed Sensor - Right Front - terminal 21 and terminal 26 B5RR Wheel Speed Sensor - Right Rear - terminal 22 and terminal 37 If less than infinite resistance

Repair the short to ground on the circuit.

If infinite resistance

5. Test for less than 2 Ω between the B5 Wheel Speed Sensor harness connector terminal 1 and the K17 Electronic Brake Control Module harness connector terminal listed below:

B5LF Wheel Speed Sensor - Left Front - terminal 24 B5LR Wheel Speed Sensor - Left Rear - terminal 39

B5RF Wheel Speed Sensor - Right Front - terminal 21 B5RR Wheel Speed Sensor - Right Rear - terminal 22 If 2 Ω or greater

Repair the open/high resistance in the circuit.

If less than 2 Ω

6. Test for less than 2 Ω between the B5 Wheel Speed Sensor harness connector terminal 2 and the K17 Electronic Brake Control Module harness connector terminal listed below:

B5LF Wheel Speed Sensor - Left Front - terminal 7 B5LR Wheel Speed Sensor - Left Rear - terminal 23

B5RF Wheel Speed Sensor - Right Front - terminal 26 B5RR Wheel Speed Sensor - Right Rear - terminal 37 If 2 Ω or greater

Repair the open/high resistance in the circuit.

If less than 2 Ω

7. Replace the B5 Wheel Speed Sensor.

8. Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.

If the DTC sets

Replace the K17 Electronic Brake Control Module.

If the DTC does not set

9. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Front Wheel Speed Sensor Replacement Rear Wheel Speed Sensor Replacement

Control Module References for Electronic Brake Control Module replacement, programming and setup

DTC C052B, C052D, C052F, C055B, OR C05AE: ABS PUMP MOTOR

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C052B

ABS Pump Motor Performance

DTC C052D

ABS Pump Motor Supply Control Circuit High

DTC C052F

ABS Pump Motor Supply Circuit

DTC C055B

ABS Pump Motor Supply Circuit Low

DTC C05AE

ABS Pump Motor Calibration Not Learned

Diagnostic Fault Information

Circuit/System Description

The electronic brake control module monitors two different blocks of memory to determine its capability to control the system shutdown process.

Conditions for Running the DTC

Vehicle ON or Vehicle in Service Mode.

Conditions for Setting the DTC

Keep alive voltage regulator not functional. Processor loses complete battery power.

Battery voltage is under 9 V and the vehicle is not moving.

Action Taken When the DTC Sets

A warning indicator may be displayed.

A driver information center message may be displayed.

The electronic brake control module disables ABS, traction control system and vehicle stability enhancement system for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The electronic brake control module clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Check to ensure battery shunt is not opened.

Circuit/System Testing

1. Vehicle OFF and all vehicle systems OFF, disconnect the harness connector at the K17 Electronic Brake Control Module. It may take up to 2 min for all vehicle systems to power down.

2. Test for less than 10 Ω between the ground circuit terminals listed below and ground: Terminal 14

Terminal 46

If 10 Ω or greater

1. Vehicle OFF.

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

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

If less than 2 Ω, repair the open/high resistance in the ground connection.

If less than 10 Ω

3. Vehicle in Service Mode.

4. Verify that a test lamp illuminates between the B+ circuit terminals listed below and ground. Terminal 1

Terminal 30

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

1. Vehicle OFF.

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

If 2 Ω or greater, repair the open/high resistance or the short to ground in the circuit. If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.

If the test lamp illuminates

5. Vehicle in Service Mode.

6. Verify that a test lamp illuminates between the ignition circuit terminal 17 and ground.

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

1. Vehicle OFF.

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

If 2 Ω or greater, repair the open/high resistance or the short to ground in the circuit.

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

If the test lamp illuminates

7. Replace the K17 Electronic Brake Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module replacement, programming and setup

DTC C0552, C10C0, C10C4, OR C1251: YAW RATE (WITHOUT UGN)

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C10C0 00

Yaw Rate Circuit Performance

DTC C10C4 00

Yaw Rate 1 - 2 Not Plausible

Circuit/System Description

The yaw rate, lateral acceleration and longitudinal acceleration sensors are combined into one multi-axis acceleration sensor, internal to the inflatable restraint sensing and diagnostic module. The multi-axis acceleration sensor communicates with the electronic brake control module via serial data. The electronic brake control module activates the stability control function depending on the multi-axis acceleration sensor input.

The inflatable restraint sensing and diagnostic module uses the multi-axis acceleration sensor to determine if the vehicle is in a roll over or near collision incident.

Conditions for Running the DTC

Vehicle ON or Vehicle in Service Mode.

Conditions for Setting the DTC

The yaw rate acceleration signal is not plausible with the vehicle acceleration.

Action Taken When the DTC Sets

The Air Bag Indicator turns ON.

The traction/stability control indicator turns ON.

The electric brake control module disables the stability control and the hill start assist for the duration of the ignition cycle.

Conditions for Clearing the DTC

A current DTC clears when the diagnostic runs and passes.

The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

1. Verify the K36 Inflatable Restraint Sensing and Diagnostic Module is installed correctly.

If loose or incorrect installation

Correct the installation of the component.

If installed correctly

1. Perform the Vehicle Yaw Sensor Learn (with UGN)Vehicle Yaw Sensor Learn (without UGN).

2. Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.

If the DTC sets, replace the K36 Inflatable Restraint Sensing and Diagnostic Module.

3. Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.

If the DTC sets, replace the K17 Electronic Brake Control Module. If the DTC does not set

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module or Inflatable Restraint Sensing and Diagnostic Module replacement, programming and setup

DTC C0555-C0558: WHEEL SPEED SENSOR INCORRECT COMPONENT INSTALLED

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C0555

Left Front Wheel Speed Sensor Incorrect Component Installed

DTC C0556

Right Front Wheel Speed Sensor Incorrect Component Installed

DTC C0557

Left Rear Wheel Speed Sensor Incorrect Component Installed

DTC C0558

Right Rear Wheel Speed Sensor Incorrect Component Installed

Diagnostic Fault Information

Circuit/System Description

The wheel speeds are detected by active wheel speed sensors and encoder rings. The encoder rings consist of permanent magnets located in the hub. As the wheel spins the magnetic encoder ring rotates and passes by the wheel speed sensor head; which generates a sign wave in the wheel speed sensor. Each wheel speed sensor

receives ignition voltage from the electronic brake control module and provides an alternating current square wave signal to the electronic brake control module. The electronic brake control module uses the frequency of the signals to calculate the wheel speeds.

Conditions for Running the DTC

Vehicle On or Vehicle in Service Mode Ignition voltage is greater than 10 V.

Conditions for Setting the DTC

C0555, C0556, C0557, C0558

Incorrect part number wheel speed sensor installed The tone ring may be demagnetized

Water intrusion in the wiring harness

Debris on the wheel speed sensor or the tone ring

Missing tooth or teeth on the wheel speed sensor tone ring

Air gap between the wheel speed sensor and the tone ring too large

Electrical magnetic interference with the wheel speed sensor harness

Actions Taken when the DTC Sets

The ABS indicator turns ON.

The traction/stability control indicator turns ON.

The Service Brake Assist and Service StabiliTrak messages are displayed on the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Diagnostic Aids

Do not use a magnet to clean the wheel speed sensor magnetic encoder ring. Inspect the wheel speed sensor magnetic encoder ring for debris or corrosion.

If two or more wheel speed sensors are inoperative, diagnose each wheel speed sensor individually.

If any of the DTCs are set, refer to the Diagnostic Fault Information table for possible mechanical faults or conditions.

If the customer comments that the ABS indicator is ON only during moist environmental conditions (rain, snow, vehicle wash, etc.), inspect the wheel speed sensor wiring for signs of water intrusion.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Test drive the vehicle in a straight line at a speed greater than 20 km/h (13 MPH).

2. Verify all scan tool Wheel Speed Sensor parameters are within 1.6 km/h (1 MPH) of each other.

If any parameter is not within 1.6 km/h (1 MPH) of each other

Refer to Circuit/System Testing.

If each parameter is within 1.6 km/h (1 MPH) of each other

3. All OK.

Circuit/System Testing

1. Ignition On

2. Verify DTCs C0500-C0504, C0506-C0510, C050A, C050C-C050F, or C0512-C0516 are not set.

If any listed DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle

If none of the listed DTCs are set

3. Inspect the appropriate B5 Wheel Speed Sensor and encoder ring for contamination, metallic particles, physical damage, incorrect installation and the correct component.

If contamination, physical damage, incorrect installation, or the wrong component is diagnosed

Replace the appropriate B5 Wheel Speed Sensor.

If no contamination, physical damage, incorrect installation, or the wrong component is not diagnosed

4. Replace the K17 Electronic Brake Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Front Wheel Speed Sensor Replacement Rear Wheel Speed Sensor Replacement

Control Module References for Electronic Brake Control Module replacement, programming and setup

DTC C059B OR C0560: RIGHT/LEFT FRONT BRAKE PRESSURE SENSOR MISSING CALIBRATION

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C059B

Right Front Brake Pressure Sensor Missing Calibration

DTC C0560

Left Front Brake Pressure Sensor Missing Calibration

Circuit/System Description

The brake pressure sensors located in the brake pressure modulator send testpulses to determine if they are calibration with each other.

Conditions for Running the DTC

Vehicle ON or Vehicle in Service Mode.

Conditions for Setting the DTC

This diagnostic detects that the brake pressure module testpulses differ from the nominal value by more than 10%.

Action Taken When the DTC Sets

The ABS indicator turns ON.

The red brake indicator turns ON.

The traction/stability control indicator turns ON.

The Service Brake Assist and Service StabiliTrak messages are displayed on the driver information

center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Verify the DTC does not set while operating the vehicle under the Conditions for Running the DTC.

If the DTC sets

Replace the Q5 Brake Pressure Modulator.

If the DTC does not set

2. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module replacement, programming and setup

DTC C0571, C0572, OR C0574: BRAKE MASTER CYLINDER PRESSURE SENSOR 1 CIRCUIT

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C0571

Brake Master Cylinder Pressure Sensor 1 Circuit Low Voltage

DTC C0572

Brake Master Cylinder Pressure Sensor 1 Circuit High Voltage

DTC C0574

Brake Master Cylinder Pressure Sensor 1 Circuit Performance

Circuit/System Description

The electronic brake control module uses input from the master cylinder pressure sensor for more accurate control during a vehicle stability enhancement system event. The master cylinder pressure sensor is internal to the brake pressure modulator.

Conditions for Running the DTC

The brake pedal is not applied.

Ignition voltage is greater than 10 V.

Vehicle ON or Vehicle in Service Mode.

Conditions for Setting the DTC

C0571

A short to ground or open is detected on the sensor signal circuit.

C0572

A short to battery is detected on the sensor signal circuit.

C0574

The master cylinder pressure sensor raw offset is out of specified range.

Action Taken When the DTC Sets

The ABS indicator turns ON.

The red brake indicator turns ON.

The traction/stability control indicator turns ON.

The Service Brake Assist and Service StabiliTrak messages are displayed on the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Perform a brake hydraulic system test, refer to Hydraulic Brake System Diagnosis .

If the brake hydraulic system test does not pass

Repair as necessary.

If the brake hydraulic system tests normal

2. Replace the K17 Electronic Brake Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Electronic Brake Control Module with Brake Pressure Modulator Valve Replacement

Control Module References for Electronic Brake Control Module replacement, programming and setup

DTC C0575, C0576, OR C0578: LEFT REAR BRAKE PRESSURE SENSOR CIRCUIT

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C0575

Left Rear Brake Pressure Sensor Circuit Low Voltage

DTC C0576

Left Rear Brake Pressure Sensor Circuit High Voltage

DTC C0578

Left Rear Brake Pressure Sensor Circuit Performance

Circuit/System Description

The Electronic Brake Control Module detects an issue with the Left Rear Brake Pressure Sensor which is located internally in the Brake Pressure Modulator Valve.

Conditions for Running the DTC

Vehicle ON or Vehicle in Service Mode.

Conditions for Setting the DTC

C0575

The Electronic Brake Control Module detects the Left Rear Brake Pressure Sensor is shorted to ground.

C0576

The Electronic Brake Control Module detects the Left Rear Brake Pressure Sensor is shorted to voltage.

C0578

The Electronic Brake Control Module detects the Left Rear Brake Pressure Sensor is out of the specified value.

Action Taken When the DTC Sets

The ABS indicator turns ON.

The red brake indicator turns ON.

The traction/stability control indicator turns ON.

The Service Brake Assist and Service StabiliTrak messages are displayed on the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Verify the DTC does not set while operating the vehicle under the Conditions for Running the DTC.

If the DTC sets

Replace the Q5 Brake Pressure Modulator.

If the DTC does not set

2. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Electronic Brake Control Module with Brake Pressure Modulator Valve Replacement

Control Module References for Electronic Brake Control Module replacement, programming and setup

DTC C05A3, C05A4, OR C10EE: WHEEL SPEED SENSOR SUPPLY CIRCUIT/WHEEL SPEED SENSOR FREQUENCY

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C05A3

Wheel Speed Sensor Supply Circuit High

DTC C05A4

Wheel Speed Sensor Supply Circuit Low

DTC C10EE

Wheel Speed Sensor Frequency

Diagnostic Fault Information

Circuit/System Description

The wheel speeds are detected by active wheel speed sensors and encoder rings. The encoder rings consist of

permanent magnets located in the hub. As the wheel spins the magnetic encoder ring rotates and passes by the wheel speed sensor head; which generates a sign wave in the wheel speed sensor. Each wheel speed sensor receives ignition voltage from the electronic brake control module and provides an alternating current square wave signal to the electronic brake control module. The electronic brake control module uses the frequency of the signals to calculate the wheel speeds.

Conditions for Running the DTC

Vehicle On or Vehicle in Service Mode Ignition voltage is greater than 10 V.

Conditions for Setting the DTC

C05A3, C05A4

An open or a high resistance is detected on a wheel speed sensor circuit.

A short to ground or an open/high resistance is detected on a wheel speed sensor signal circuit. A short to voltage is detected on a wheel speed sensor signal circuit.

C10EE

The tone ring may be demagnetized Water intrusion in the wiring harness

Incorrectly mounted wheel speed sensor

Debris on the wheel speed sensor or the tone ring

Missing tooth or teeth on the wheel speed sensor tone ring

Air gap between the wheel speed sensor and the tone ring too large

Electrical magnetic interference with the wheel speed sensor harness

Actions Taken when the DTC Sets

The ABS indicator turns ON.

The traction/stability control indicator turns ON.

The Service Brake Assist and Service StabiliTrak messages are displayed on the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Diagnostic Aids

Do not use a magnet to clean the wheel speed sensor magnetic encoder ring. Inspect the wheel speed sensor magnetic encoder ring for debris or corrosion.

If two or more wheel speed sensors are inoperative, diagnose each wheel speed sensor individually.

If the customer comments that the ABS indicator is ON only during moist environmental conditions (rain, snow, vehicle wash, etc.), inspect the wheel speed sensor wiring for signs of water intrusion.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Test drive the vehicle in a straight line at a speed greater than 20 km/h (13 MPH).

2. Verify all scan tool Wheel Speed Sensor parameters are within 1.6 km/h (1 MPH) of each other.

If any parameter is not within 1.6 km/h (1 MPH) of each other

Refer to Circuit/System Testing.

If each parameter is within 1.6 km/h (1 MPH) of each other

3. All OK.

Circuit/System Testing

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connectors at the appropriate B5 Wheel Speed Sensor and the harness connector at the K17 Electronic Brake Control Module, vehicle in service mode.

2. Test for less than 1 V between the appropriate K17 Electronic Brake Control Module harness connector terminals listed below and ground:

B5LF Wheel Speed Sensor - Left Front - terminal 24 and terminal 7 B5LR Wheel Speed Sensor - Left Rear - terminal 39 and terminal 23

B5RF Wheel Speed Sensor - Right Front - terminal 21 and terminal 26 B5RR Wheel Speed Sensor - Right Rear - terminal 22 and terminal 37 If 1 V or greater

Repair the short to voltage on the circuit.

If less than 1 V

3. Vehicle OFF.

4. Test for infinite resistance between the K17 Electronic Brake Control Module harness connector terminals listed below and ground:

B5LF Wheel Speed Sensor - Left Front - terminal 24 and terminal 7 B5LR Wheel Speed Sensor - Left Rear - terminal 39 and terminal 23

B5RF Wheel Speed Sensor - Right Front - terminal 21 and terminal 26 B5RR Wheel Speed Sensor - Right Rear - terminal 22 and terminal 37 If less than infinite resistance

Repair the short to ground on the circuit.

If infinite resistance

5. Test for less than 2 Ω between the B5 Wheel Speed Sensor harness connector terminal 1 and the K17 Electronic Brake Control Module harness connector terminal listed below:

B5LF Wheel Speed Sensor - Left Front - terminal 24 B5LR Wheel Speed Sensor - Left Rear - terminal 39

B5RF Wheel Speed Sensor - Right Front - terminal 21 B5RR Wheel Speed Sensor - Right Rear - terminal 22 If 2 Ω or greater

Repair the open/high resistance in the circuit.

If less than 2 Ω

6. Test for less than 2 Ω between the B5 Wheel Speed Sensor harness connector terminal 2 and the K17 Electronic Brake Control Module harness connector terminal listed below:

B5LF Wheel Speed Sensor - Left Front - terminal 7 B5LR Wheel Speed Sensor - Left Rear - terminal 23

B5RF Wheel Speed Sensor - Right Front - terminal 26 B5RR Wheel Speed Sensor - Right Rear - terminal 37 If 2 Ω or greater

Repair the open/high resistance in the circuit.

If less than 2 Ω

7. Replace the B5 Wheel Speed Sensor.

8. Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.

If the DTC sets

Replace the K17 Electronic Brake Control Module.

If the DTC does not set

9. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Front Wheel Speed Sensor Replacement Rear Wheel Speed Sensor Replacement

Control Module References for Electronic Brake Control Module replacement, programming and setup

DTC C05AD: BRAKE BLENDING SYSTEM PERFORMANCE

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C05AD

Brake Blending System Performance

Circuit/System Description

The electronic brake control module uses input from the master cylinder pressure sensor for more accurate control during a vehicle stability enhancement system event. The master cylinder pressure sensor is internal to the brake pressure modulator.

Conditions for Running the DTC

The brake pedal is not applied.

Ignition voltage is greater than 10 V.

Vehicle ON or Vehicle in Service Mode.

Conditions for Setting the DTC

An anomaly in brake pressure in the master cylinder or hydraulic lines has been detected.

Action Taken When the DTC Sets

The ABS indicator turns ON.

The traction/stability control indicator turns ON.

The Service Brake Assist and Service StabiliTrak messages are displayed on the driver information

center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Diagnostic Aids

The diagnostic for DTC C05AD will have you test and inspect the base hydraulic brake system for any issues. The hydraulic brake system must be thoroughly inspected for any bent or kinked brake lines, both metal and rubber. Also the vehicles brake calipers must also be able to slide and apply freely.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Perform a brake hydraulic system test, refer to Hydraulic Brake System Diagnosis .

If the brake hydraulic system test does not pass

Repair as necessary.

If the brake hydraulic system tests normal

2. Replace the K17 Electronic Brake Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Electronic Brake Control Module with Brake Pressure Modulator Valve Replacement Control Module References for Control Module replacement, programming and setup.

DTC C05B0 OR C05B1: ABS FRONT HYDRAULIC CIRCUIT LEAK DETECTED/ABS REAR HYDRAULIC CIRCUIT LEAK DETECTED

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C05B0

ABS Front Hydraulic Circuit Leak Detected

DTC C05B1

ABS Rear Hydraulic Circuit Leak Detected

Circuit/System Description

The electronic brake control module uses input from the master cylinder pressure sensor for more accurate control during a vehicle stability enhancement system event. The master cylinder pressure sensor is internal to the brake pressure modulator.

Conditions for Running the DTC

The brake pedal is applied.

Ignition voltage is greater than 10 V.

Vehicle ON or Vehicle in Service Mode.

Conditions for Setting the DTC

The Electronic Brake Control Module detects a pressure loss associated to a hydraulic leak.

Action Taken When the DTC Sets

The ABS indicator turns ON.

The red brake indicator turns ON.

The traction/stability control indicator turns ON.

The Service Brake Assist and Service StabiliTrak messages are displayed on the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Perform a brake hydraulic system test, refer to Hydraulic Brake System Diagnosis .

If the brake hydraulic system test does not pass

Repair as necessary.

If the brake hydraulic system tests normal

2. Replace the K17 Electronic Brake Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Electronic Brake Control Module with Brake Pressure Modulator Valve Replacement

Control Module References for Electronic Brake Control Module replacement, programming and setup

DTC C05B2: STEERING WHEEL ANGLE SENSOR SIGNAL - YAW RATE SENSOR SIGNAL NOT PLAUSIBLE

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C05B2

Steering Wheel Angle Sensor Signal - Yaw Rate Sensor Signal Not Plausible

Circuit/System Description

The electronic brake control module receives high speed serial data inputs from the steering angle sensor and multi-axis sensor, that identify the position and direction of the steering wheel rotation as well as vehicle yaw and lateral movement. The electronic brake control module utilizes these signal to calculate the driver intended driving direction.

The steering wheel angle sensor is integrated into the steering gear assembly. The multi-axis sensor is located internally into the inflatable restraint and sensing diagnostic module.

Conditions for Running the DTC

Vehicle ON or Vehicle in Service Mode.

Conditions for Setting the DTC

The difference between model yaw rate out of steering angle, model yaw rate out of wheel speeds and measured yaw rate has to be less than 2 deg/s during straight ahead driving and cornering.

Action Taken When the DTC Sets

The traction/stability control indicator turns ON.

A Service StabiliTrak message may displayed on the driver information center.

The electronic brake control module disables the traction control and the electronic stability control for the duration of the ignition cycle.

Conditions for Clearing the DTC

A current DTC clears when the diagnostic runs and passes.

The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Diagnostic Aids

Inspect the serial data circuits and connections at the power steering control module and the electronic brake control module. They should be free from sources of electromagnetic interference and the connections should be clean and tight.

Circuit/System Verification

1. Vehicle in Service Mode.

2. With a scan tool check the Power Steering Control Module for any DTCs.

If any DTCs are present in the Power Steering Control Module

Refer to Diagnostic Trouble Code (DTC) List - Vehicle in Power Steering Diagnostic Information and Procedures.

If there are no DTCs are present in the Power Steering Control Module

3. Verify that the steering gear assembly is not incorrectly installed.

If the steering gear assembly is installed incorrectly

Refer to Electric Belt Drive Rack and Pinion Steering Gear Replacement

If the steering gear assembly is installed correctly

4. Perform the Steering Wheel Angle Sensor Centering procedure.

If the Steering Angle Sensor Centering procedure corrected the DTC

Proceed to step 7

If the Steering Angle Sensor Centering procedure did not correct the DTC

5. Verify that the inflatable restraint and sensing diagnostic module is installed correctly.

If inflatable restraint and sensing diagnostic module is not installed correctly

Refer to Airbag Sensing and Diagnostic Module Replacement

If inflatable restraint and sensing diagnostic module is installed correctly

6. Replace the K17 Electronic Brake Control Module.

7. All OK

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Electric Belt Drive Rack and Pinion Steering Gear Replacement

Control Module References for module replacement, programming and setup.

DTC C106A OR C106B: PUMP MOTOR RELAY CIRCUIT LOW/PUMP MOTOR RELAY CIRCUIT HIGH

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C106A

Pump Motor Relay Circuit Low

DTC C106B

Pump Motor Relay Circuit High

Diagnostic Fault Information

Circuit/System Description

Battery positive voltage is supplied to the electronic brake control module at all times through a 60 A fuse located in the underhood fuse block. The electronic brake control module uses this voltage to power the pump motor. The pump motor is an integral part of the brake pressure modulator, while the pump motor relay is

integral to the electronic brake control module. The pump motor relay is not engaged during normal system operation. When the ABS or the action control system operation is required the electronic brake control module activates the pump motor relay and turns the pump motor ON.

Conditions for Running the DTC

Vehicle ON or Vehicle in Service Mode. The ignition voltage is greater than 10 V.

Conditions for Setting the DTC

C106A

The electronic brake control module detects the ABS pump motor relay circuit is shorted to ground.

C106B

The electronic brake control module detects the ABS pump motor relay circuit is shorted to voltage.

Action Taken When the DTC Sets

The ABS indicator turns ON.

The red brake indicator turns ON.

The traction/stability control indicator turns ON.

The Service Brake Assist and Service StabiliTrak messages are displayed on the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

1. Vehicle OFF and all vehicle systems OFF, disconnect the harness connector at the K17 Electronic Brake Control Module. It may take up to 2 min for all vehicle systems to power down.

2. Test for less than 10 Ω between the ground circuit terminals listed below and ground: Terminal 14

Terminal 46

If 10 Ω or greater

1. Vehicle OFF.

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

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

If less than 2 Ω, repair the open/high resistance in the ground connection.

If less than 10 Ω

3. Vehicle in Service Mode.

4. Verify that a test lamp illuminates between the B+ circuit terminals listed below and ground. Terminal 1

Terminal 30

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

1. Vehicle OFF.

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

If 2 Ω or greater, repair the open/high resistance or the short to ground in the circuit. If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.

If the test lamp illuminates

5. Vehicle in Service Mode.

6. Verify that a test lamp illuminates between the ignition circuit terminal 17 and ground.

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

1. Vehicle OFF.

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

If 2 Ω or greater, repair the open/high resistance or the short to ground in the circuit. If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.

If the test lamp illuminates

7. Replace the K17 Electronic Brake Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Electronic Brake Control Module with Brake Pressure Modulator Valve Replacement

Control Module References for Electronic Brake Control Module replacement, programming and setup.

DTC C106D-C106F OR C1070: VALVE RELAY CIRCUIT

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C106D

Valve Relay Circuit

DTC C106E

Valve Relay Circuit Performance

DTC C106F

Valve Relay Circuit Low

DTC C1070

Valve Relay Circuit High

Diagnostic Fault Information

Circuit/System Description

Battery positive voltage is supplied to the electronic brake control module at all times through a 60 A fuse located in the underhood fuse block. The electronic brake control module uses this voltage to power the pump

motor. The pump motor is an integral part of the brake pressure modulator, while the pump motor relay is integral to the electronic brake control module. The pump motor relay is not engaged during normal system operation. When the ABS or the action control system operation is required the electronic brake control module activates the pump motor relay and turns the pump motor ON.

Conditions for Running the DTC

Vehicle ON or Vehicle in Service Mode. The ignition voltage is greater than 10 V.

Conditions for Setting the DTC

C106D

The electronic brake control module detects the valve relay has not switched ON successfully.

C106E

The electronic brake control module detects the valve relay is exposed to fatal error to avoid damage.

C106F

The electronic brake control module detects the valve relay circuit is shorted to ground.

C1070

The electronic brake control module detects the valve relay circuit is shorted to voltage.

Action Taken When the DTC Sets

The ABS indicator turns ON.

The red brake indicator turns ON.

The traction/stability control indicator turns ON.

The Service Brake Assist and Service StabiliTrak messages are displayed on the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

1. Vehicle OFF and all vehicle systems OFF, disconnect the harness connector at the K17 Electronic Brake Control Module. It may take up to 2 min for all vehicle systems to power down.

2. Test for less than 10 Ω between the ground circuit terminals listed below and ground: Terminal 14

Terminal 46

If 10 Ω or greater

1. Vehicle OFF.

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

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

If less than 2 Ω, repair the open/high resistance in the ground connection.

If less than 10 Ω

3. Vehicle in Service Mode.

4. Verify that a test lamp illuminates between the B+ circuit terminals listed below and ground. Terminal 1

Terminal 30

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

1. Vehicle OFF.

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

If 2 Ω or greater, repair the open/high resistance or the short to ground in the circuit. If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.

If the test lamp illuminates

5. Vehicle in Service Mode.

6. Verify that a test lamp illuminates between the ignition circuit terminal 17 and ground.

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

1. Vehicle OFF.

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

If 2 Ω or greater, repair the open/high resistance or the short to ground in the circuit. If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.

If the test lamp illuminates

7. Replace the K17 Electronic Brake Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Electronic Brake Control Module with Brake Pressure Modulator Valve Replacement

Control Module References for Electronic Brake Control Module replacement, programming and setup.

DTC C10AC: BRAKE SYSTEM CALCULATED COMPONENT OVERHEAT

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C10AC 00

Brake System Calculated Component Overheat

Circuit/System Description

The electronic brake control module monitors how often the traction control or the stability control system activates in order to calculate an estimate of the front brake discs temperature. In most cases the high temperatures are caused by extended traction control activation. If the electronic brake control module calculates that the front brake components temperatures are too high, the electronic brake control module will temporarily suspend the traction control system function until the front brake discs cool down.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

The electronic brake control module detects the calculated temperature of the brake components is higher than 500°C (932°F).

Action Taken When the DTC Sets

The traction/stability control indicator turns ON.

The electronic brake control module disables the ABS, the traction control, the stability control and the electronic brake distribution for the duration of the ignition cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Diagnostic Aids

DTC C10AC does not indicate a malfunction has occurred. This DTC indicates there was excessive ABS, traction control or stability control activation that caused the high temperatures.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

NOTE: Since most occurrences of this DTC are caused by excessive brake usage, review with the customer the conditions under which the DTC set.

1. Allow the brakes to cool down before performing test.

2. Verify that no other DTCs are set.

If any other DTCs are set

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

If no other DTCs are set

3. Verify DTC C10AC does not set while driving the vehicle under normal braking conditions.

If the DTC sets

Replace the K17 Electronic Brake Control Module.

If the DTC does not set

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module replacement, programming, and setup

DTC C10EA: POWERTRAIN CONTROL MODULE INDICATED REQUESTED TORQUE

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C10EA

Powertrain Control Module Indicated Requested Torque

Circuit/System Description

The electronic brake control module and the engine control module simultaneously control the regenerative braking. When certain engine control module DTCs are set, the engine control module will not be able to perform the regenerative braking. A serial data message is sent to the electronic brake control module indicating that regenerative braking is not allowed.

Conditions for Running the DTC

Vehicle in Service Mode.

The ignition voltage is greater than 10 V.

Conditions for Setting the DTC

The engine control module diagnoses a condition preventing the engine control portion of the regenerative braking function and sends a serial data message to the electronic brake control module indicating that regenerative braking is not allowed.

Action Taken When the DTC Sets

The ABS indicator turns ON.

The MIL indicator may be on or flashing.

The traction control/stability control indicator turns ON.

The Service StabiliTrak message is displayed on the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic

stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Vehicle in Service Mode.

2. Verify that no other DTCs are set except for C10EA.

If any other DTCs are set

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

If no other DTCs are set

3. Replace the K20 Engine Control Module.

4. Verify that DTC C10EA does not set while operating the vehicle under the Conditions for Running the DTC. You may also operate the vehicle under the conditions that you observed from the Freeze Frame/Failure Records data.

If DTC C10EA sets

Replace the K17 Electronic Brake Control Module.

If DTC C10EA does not set

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module or Engine Control Module replacement, programming and setup

DTC C10EB: ENGINE CONTROL MODULE INDICATED TRACTION CONTROL

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C10EB

Engine Control Module Indicated Traction Control

Circuit/System Description

The electronic brake control module and the engine control module simultaneously control the traction control. The electronic brake control module sends a serial data message to the engine control module requesting torque reduction. When certain engine control module DTCs are set, the engine control module will not be able to perform the torque reduction for traction control. A serial data message is sent to the electronic brake control module indicating that traction control is not allowed.

Conditions for Running the DTC

Vehicle in Service Mode.

The ignition voltage is greater than 10 V.

Conditions for Setting the DTC

The engine control module diagnoses a condition preventing the engine control portion of the traction control function and sends a serial data message to the electronic brake control module indicating that torque reduction is not allowed.

Action Taken When the DTC Sets

The ABS indicator turns ON.

The MIL indicator may be on or flashing.

The traction control/stability control indicator turns ON.

The Service StabiliTrak message is displayed on the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Vehicle in Service Mode.

2. Verify that no other DTCs are set except for C10EB.

If any other DTCs are set

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

If no other DTCs are set

3. Replace the K20 Engine Control Module.

4. Verify that DTC C10EB does not set while operating the vehicle under the Conditions for Running the DTC. You may also operate the vehicle under the conditions that you observed from the Freeze Frame/Failure Records data.

If DTC C10EB sets

Replace the K17 Electronic Brake Control Module.

If DTC C10EB does not set

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module or Engine Control Module replacement, programming and setup

DTC C112B: ACTIVE BRAKE SYSTEM PERFORMANCE

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C112B

Active Brake System Performance

Circuit/System Description

The Electronic Brake Control Module detects that there has been no pressure increase for a period of time.

Conditions for Running the DTC

Vehicle ON or Vehicle in Service Mode.

Conditions for Setting the DTC

The Electronic Brake Control Module detects that there has been no pressure increase for a period of time.

Action Taken When the DTC Sets

The ABS indicator turns ON.

The red brake indicator turns ON.

The traction/stability control indicator turns ON.

The Service Brake Assist and Service StabiliTrak messages are displayed on the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

Accelerating to 60 KPH and maintaining this speed for 5 s with no pressure increase noted by the electronic brake control module.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Verify the DTC does not set while operating the vehicle under the Conditions for Running the DTC.

If the DTC sets

Replace the K17 Electronic Brake Control Module.

If the DTC does not set

2. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Electronic Brake Control Module with Brake Pressure Modulator Valve Replacement

Control Module References for Electronic Brake Control Module replacement, programming and setup

DTC C112F: ISOLATION VALVE PERFORMANCE

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C112F

Isolation Valve Performance

Circuit/System Description

The electronic brake control module calculates and monitors the internal temperature of the brake pressure modulator valves. In most cases the high temperatures are caused by extended traction control activation. If the electronic brake control module calculates that the brake pressure modulator valves temperatures are too high, the electronic brake control module will temporarily suspend the traction control system function until the brake pressure modulator valves cool down.

Conditions for Running the DTC Vehicle ON or in Service Mode. Conditions for Setting the DTC

The electronic brake control module detects the calculated temperature of the brake pressure modulator valves is higher than 195°C (383°F).

Action Taken When the DTC Sets

The traction/stability control indicator turns ON.

The electronic brake control module disables the ABS, the traction control, the stability control and the electronic brake distribution for the duration of the ignition cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Diagnostic Aids

DTC C112F does not indicate a malfunction has occurred. This DTC indicates there was excessive ABS, traction control or stability control activation that caused the high temperatures.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

NOTE: Since most occurrences of this DTC are caused by excessive brake usage, review with the customer the conditions under which the DTC set.

1. Allow the brakes to cool down before performing test.

2. Verify that no other DTCs are set.

If any other DTCs are set

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

If no other DTCs are set

3. Verify DTC C112F does not set while driving the vehicle under normal braking conditions.

If the DTC sets

Replace the K17 Electronic Brake Control Module.

If the DTC does not set

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module replacement, programming, and setup

DTC C1200: POWERTRAIN SENSED BRAKE PEDAL INFORMATION MESSAGE COUNTER INCORRECT

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C1200

Powertrain Sensed Brake Pedal Information Message Counter Incorrect

Circuit/System Description

The body control module monitors the brake pedal position sensor and sends a serial data message to the both the electronic brake control module and engine control modules when the brake pedal is applied. The engine control module compares the correlation between the brake pedal positions and the brake control brake pedal position sensor to sense the driver's application of the brake pedal.

Conditions for Running the DTC

Vehicle ON

The brake pedal is applied.

The ignition voltage is greater than 10 V.

The accelerator pedal position is greater than 20 %.

Conditions for Setting the DTC

The brake pedal position sensor signal is not applied while the brake control brake pedal position sensor indicates the brake pedal is applied.

Action Taken When the DTC Sets

A driver information center message and/or a warning indicator will not be displayed.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Diagnostic Aids

DTC C1200 may set if the brake pedal is applied while accelerating.

Check the Engine Control Module for any accelerator pedal DTCs and correct them first before diagnosing this DTC.

Reference Information

Schematic Reference

Antilock Brake System Schematics Exterior Lights Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Vehicle in Service Mode.

2. Verify that no other DTCs are set except for C1200.

If any other DTCs are set

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

If no other DTCs are not set

3. Verify the brake pedal position sensor or the brake pedal is not binding causing residual brake pressure to be detected.

If a condition is found

Repair or replace the applicable component.

If a condition is not found

4. Verify the scan tool electronic brake control module Brake Pedal Position Sensor Signal parameter changes between Applied and Released when applying and releasing the brake pedal.

If the parameter does not change

Refer to Symptoms - Lighting .

If the parameter changes

5. Replace the K17 Electronic Brake Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module replacement, programming and setup

DTC C1203: INVALID DATA RECEIVED FROM INTEGRATED CHASSIS CONTROL MODULE

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C1203

Invalid Data Received From Integrated Chassis Control Module

Circuit/System Description

The electronic shift braking request data is delivered from the chassis control module to the electronic brake control module (EBCM) via serial data.

Conditions for Running the DTC

Vehicle in Service Mode.

The ignition voltage is greater than 10 V.

Conditions for Setting the DTC

The electronic brake control module detects that the electronic shift braking request signal value is not a continuous successor of the previous value.

Action Taken When the DTC Sets

The DTC is stored in memory. No indicators or service messages are displayed.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Diagnostic Aids

Inspect the chassis control module for any DTCs.

Circuit/System Verification

1. Vehicle in Service Mode.

2. Verify that no other DTCs are set except for C1203.

If any other DTCs are set

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

If no other DTCs are set

3. Replace the K17 Electronic Brake Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module or Engine Control Module replacement, programming and setup

DTC C124C-C124E OR C1269: WHEEL SPEED SENSOR INCORRECT MOUNTING

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C124C

Left Front Wheel Speed Sensor Incorrect Mounting

DTC C124D

Right Front Wheel Speed Sensor Incorrect Mounting

DTC C124E

Left Rear Wheel Speed Sensor Incorrect Mounting

DTC C1269

Right Rear Wheel Speed Sensor Incorrect Mounting

Diagnostic Fault Information

Circuit/System Description

The wheel speeds are detected by active wheel speed sensors and encoder rings. The encoder rings consist of permanent magnets located in the hub. As the wheel spins the magnetic encoder ring rotates and passes by the wheel speed sensor head; which generates a sign wave in the wheel speed sensor. Each wheel speed sensor receives ignition voltage from the electronic brake control module and provides an alternating current square wave signal to the electronic brake control module. The electronic brake control module uses the frequency of the signals to calculate the wheel speeds.

Conditions for Running the DTC

Vehicle On or Vehicle in Service Mode Ignition voltage is greater than 10 V.

Conditions for Setting the DTC

C124C, C124D, C124E, C1269

Loose or improperly mounted sensor The tone ring may be demagnetized Water intrusion in the wiring harness

Debris on the wheel speed sensor or the tone ring

Missing tooth or teeth on the wheel speed sensor tone ring

Air gap between the wheel speed sensor and the tone ring too large

Electrical magnetic interference with the wheel speed sensor harness

Actions Taken when the DTC Sets

The ABS indicator turns ON.

The traction/stability control indicator turns ON.

The Service Brake Assist and Service StabiliTrak messages are displayed on the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Diagnostic Aids

Do not use a magnet to clean the wheel speed sensor magnetic encoder ring. Inspect the wheel speed sensor magnetic encoder ring for debris or corrosion.

If two or more wheel speed sensors are inoperative, diagnose each wheel speed sensor individually.

If any of the DTCs are set, refer to the Diagnostic Fault Information table for possible mechanical faults or conditions.

If the customer comments that the ABS indicator is ON only during moist environmental conditions (rain, snow, vehicle wash, etc.), inspect the wheel speed sensor wiring for signs of water intrusion.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Test drive the vehicle in a straight line at a speed greater than 20 km/h (13 MPH).

2. Verify all scan tool Wheel Speed Sensor parameters are within 1.6 km/h (1 MPH) of each other.

If any parameter is not within 1.6 km/h (1 MPH) of each other

Refer to Circuit/System Testing.

If each parameter is within 1.6 km/h (1 MPH) of each other

3. All OK.

Circuit/System Testing

1. Ignition On

2. Verify DTCs C0500-C0504, C0506-C0510, C050A, C050C-C050F, or C0512-C0516 are not set.

If any listed DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle

If none of the listed DTCs are set

3. Inspect the appropriate B5 Wheel Speed Sensor and encoder ring for contamination, metallic particles, physical damage, incorrect installation and the correct component.

If contamination, physical damage, incorrect installation, or the wrong component is diagnosed

Replace the appropriate B5 Wheel Speed Sensor.

If no contamination, physical damage, incorrect installation, or the wrong component is not diagnosed

4. Replace the K17 Electronic Brake Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Front Wheel Speed Sensor Replacement Rear Wheel Speed Sensor Replacement

Control Module References for Electronic Brake Control Module replacement, programming and setup

DTC C1259: POWERTRAIN AUTOMATIC BRAKING REQUEST MESSAGE COUNTER INCORRECT

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C1259

Powertrain Automatic Braking Request Message Counter Incorrect

Circuit/System Description

The automatic braking request signal is delivered from the engine control module (ECM) to the electronic brake control module (EBCM) via serial data.

Conditions for Running the DTC

Vehicle in Service Mode.

The ignition voltage is greater than 10 V.

Conditions for Setting the DTC

The electronic brake control module detects that the automatic braking request signal value is not a continuous successor of the previous value.

Action Taken When the DTC Sets

The ABS indicator turns ON.

The MIL indicator may be on or flashing.

The traction control/stability control indicator turns ON.

The Service StabiliTrak message is displayed on the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Diagnostic Aids

Inspect the engine control module, hybrid powertrain control modules, and drive motor control modules for any

DTCs.

Circuit/System Verification

1. Vehicle in Service Mode.

2. Verify that no other DTCs are set except for C1259.

If any other DTCs are set

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

If no other DTCs are set

3. Replace the K17 Electronic Brake Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module or Engine Control Module replacement, programming and setup

DTC C1268: ACCELERATOR PEDAL OVERRIDE ACTIVE MESSAGE COUNTER INCORRECT

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C1268

Accelerator Pedal Override Active Message Counter Incorrect

Circuit/System Description

The accelerator pedal position data is delivered from the engine control module (ECM) to the electronic brake control module (EBCM) via serial data.

Conditions for Running the DTC

Vehicle in Service Mode.

The ignition voltage is greater than 10 V.

Conditions for Setting the DTC

The electronic brake control module detects that the accelerator pedal position signal value is not a continuous successor of the previous value.

Action Taken When the DTC Sets

The ABS indicator turns ON.

The MIL indicator may be on or flashing.

The traction control/stability control indicator turns ON.

The Service StabiliTrak message is displayed on the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Diagnostic Aids

Inspect the engine control module, hybrid powertrain control modules, and drive motor control modules for any DTCs.

Circuit/System Verification

1. Vehicle in Service Mode.

2. Verify that no other DTCs are set except for C1268.

If any other DTCs are set

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

If no other DTCs are set

3. Replace the K17 Electronic Brake Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module or Engine Control Module replacement, programming and setup

DTC C1284 OR C1285: BRAKE ASSIST INFORMATION 1 MESSAGE COUNTER INCORRECT/BRAKE ASSIST INFORMATION 2 MESSAGE COUNTER INCORRECT

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C1284

Brake Assist Information 1 Message Counter Incorrect

DTC C1285

Brake Assist Information 2 Message Counter Incorrect

Circuit/System Description

The brake assist data is delivered from the brake booster control module to the electronic brake control module (EBCM) via serial data.

Conditions for Running the DTC

Vehicle in Service Mode.

The ignition voltage is greater than 10 V.

Conditions for Setting the DTC

The electronic brake control module detects that the brake assist signal value is not a continuous successor of the previous value.

Action Taken When the DTC Sets

The ABS indicator turns ON.

The MIL indicator may be on or flashing.

The traction control/stability control indicator turns ON.

The Service StabiliTrak message is displayed on the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Diagnostic Aids

Inspect the brake booster control module for any DTCs.

Circuit/System Verification

1. Vehicle in Service Mode.

2. Verify that no other DTCs are set except for C1284 or C1285.

If any other DTCs are set

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

If no other DTCs are set

3. Replace the K17 Electronic Brake Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module or Engine Control Module replacement, programming and setup

DTC C1286: COMMANDED AXLE TORQUE MESSAGE COUNTER INCORRECT

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C1286

Commanded Axle Torque Message Counter Incorrect

Circuit/System Description

The commanded axle torque data is delivered from the engine control module (ECM) to the electronic brake control module (EBCM) via serial data.

Conditions for Running the DTC

Vehicle in Service Mode.

The ignition voltage is greater than 10 V.

Conditions for Setting the DTC

The electronic brake control module detects that the commanded axle torque signal value is not a continuous successor of the previous value.

Action Taken When the DTC Sets

The ABS indicator turns ON.

The MIL indicator may be on or flashing.

The traction control/stability control indicator turns ON.

The Service Stability Trak message is displayed on the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Diagnostic Aids

Inspect the engine control module, hybrid powertrain control modules, and drive motor control modules for any DTCs.

Circuit/System Verification

1. Vehicle in Service Mode.

2. Verify that no other DTCs are set except for C1286.

If any other DTCs are set

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

If no other DTCs are set

3. Replace the K17 Electronic Brake Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module or Engine Control Module replacement, programming and setup

DTC C1287: REGENERATIVE BRAKING AXLE TORQUE ACHIEVED MESSAGE COUNTER INCORRECT

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C1287

Regenerative Braking Axle Torque Achieved Message Counter Incorrect

Circuit/System Description

The regenerative braking axle torque data is delivered from the hybrid powertrain control module to the electronic brake control module (EBCM) via serial data.

Conditions for Running the DTC

Vehicle in Service Mode.

The ignition voltage is greater than 10 V.

Conditions for Setting the DTC

The electronic brake control module detects that the regenerative braking axle torque signal value is not a continuous successor of the previous value.

Action Taken When the DTC Sets

The ABS indicator turns ON.

The MIL indicator may be on or flashing.

The traction control/stability control indicator turns ON.

The Service Stability Trak message is displayed on the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Diagnostic Aids

Inspect the engine control module, hybrid powertrain control modules, and drive motor control modules for any DTCs.

Circuit/System Verification

1. Vehicle in Service Mode.

2. Verify that no other DTCs are set except for C1287.

If any other DTCs are set

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

If no other DTCs are set

3. Replace the K17 Electronic Brake Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module or Engine Control Module replacement, programming and setup

DTC C1288: AUTONOMOUS BRAKING ACCELERATOR ACTUAL POSITION STATUS MESSAGE COUNTER INCORRECT

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C1288

Autonomous Braking Accelerator Actual Position Status Message Counter Incorrect

Circuit/System Description

The autonomous braking accelerator actual position data is delivered from the engine control module (ECM) to the electronic brake control module (EBCM) via serial data.

Conditions for Running the DTC

Vehicle in Service Mode.

The ignition voltage is greater than 10 V.

Conditions for Setting the DTC

The electronic brake control module detects that the autonomous braking accelerator actual position signal value is not a continuous successor of the previous value.

Action Taken When the DTC Sets

The ABS indicator turns ON.

The MIL indicator may be on or flashing.

The traction control/stability control indicator turns ON.

The Service StabiliTrak message is displayed on the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Diagnostic Aids

Inspect the engine control module, hybrid powertrain control modules, and drive motor control modules for any

DTCs.

Circuit/System Verification

1. Vehicle in Service Mode.

2. Verify that no other DTCs are set except for C1288.

If any other DTCs are set

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

If no other DTCs are set

3. Replace the K17 Electronic Brake Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module or Engine Control Module replacement, programming and setup

DTC C1289: CHARGING SYSTEM PARK BRAKE AUTONOMOUS APPLY REQUEST MESSAGE COUNTER INCORRECT

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C1289

Charging System Park Brake Autonomous Apply Request Message Counter Incorrect

Circuit/System Description

The charging system park brake autonomous apply request data is delivered from the Hybrid Powertrain Control Module 2 (VICM) to the electronic brake control module (EBCM) via serial data.

Conditions for Running the DTC

Vehicle in Service Mode.

The ignition voltage is greater than 10 V.

Conditions for Setting the DTC

The electronic brake control module detects that the charging system park brake autonomous apply signal value is not a continuous successor of the previous value.

Action Taken When the DTC Sets

The ABS indicator turns ON.

The MIL indicator may be on or flashing.

The traction control/stability control indicator turns ON.

The Service StabiliTrak message is displayed on the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Diagnostic Aids

Inspect the vehicle integration control modules for any DTCs.

Circuit/System Verification

1. Vehicle in Service Mode.

2. Verify that no other DTCs are set except for C1289.

If any other DTCs are set

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

If no other DTCs are set

3. Replace the K17 Electronic Brake Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module or Engine Control Module replacement, programming and setup

DTC C1445: SYSTEM DISABLED INFORMATION STORED TEMPERATURE HIGH

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C1445 54

System Disabled Information Stored Temperature High

Circuit/System Description

The electronic brake control module receives data from other modules; engine control module, body control module, 14 V accessory power module, hybrid powertrain control module 1, and hybrid powertrain control module 2. The multi-axis acceleration sensor and the steering wheel angle sensor are needed to perform brake control functions. The module must ensure that all serial data and sensor inputs are properly received and learned.

Conditions for Running the DTC

Ignition voltage is greater than 10 V.

Vehicle ON or Vehicle in Service Mode.

Conditions for Setting the DTC

DTC C1445 54

This diagnostics detects an over temperature condition with one of the twelve solenoids due to an extended ABS, traction control and vehicle stability event lasting more than 45 seconds.

Action Taken When the DTC Sets

The ABS indicator turns ON.

The red brake indicator turns ON.

The traction/stability control indicator turns ON.

The Service Brake Assist and Service StabiliTrak messages are displayed on the driver information center.

The electronic brake control module disables the ABS, the dynamic rear proportioning, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

It may take two Vehicle ON cycles to clear this DTC.

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Diagnostic Aids

Check for hydraulic leaks, air in the brake system or incorrect brake bleed. Excessive traction control event for greater than 45 seconds.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

DTC C1445 54

NOTE: This diagnostic detects an over temperature condition with 1 of the 12 solenoids due to an extended ABS, traction control and vehicle stability event lasting more than 45 seconds. This does not indicate a failure with the Electronic Brake Control Module.

1. Verify DTC C1445 54 does not set while operating the vehicle under normal driving conditions.

If the DTC sets

Replace the K17 Electronic Brake Control Module.

If the DTC does not set

2. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module replacement, programming and setup

DTC C144B: ELECTRONIC CONTROL UNIT SOFTWARE

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C144B

Electronic Control Unit Software

For symptom byte information refer to Symptom Byte List

Circuit/System Description

The electronic brake control module determines that the electronic park brake portion of the module is programmed incorrectly.

Conditions for Running the DTC

Vehicle ON or Vehicle in Service Mode.

Conditions for Setting the DTC

The electronic brake control module is not properly programmed.

Action Taken When the DTC Sets

The ABS indicator turns ON.

The traction/stability control indicator turns ON.

The Service Brake Assist and Service StabiliTrak messages are displayed in the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program fro the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Diagnostic Aids

A newly replaced electronic brake control module can set one or more DTC on its initial vehicle in service mode cycle.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Vehicle in Service Mode.

2. Verify that DTC C144B is not set

If the DTC is set

Program the K17 Electronic Brake Control Module. Refer to Electronic Brake Control Module Programming and Setup .

1. Verify the DTC does not reset.

If the DTC resets, replace the K17 Electronic Brake Control Module. If the DTC does not reset

2. All OK

If the DTC does not set

3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module replacement, programming and setup.

DTC C158F OR C1590-C1592: TRACTION CONTROL PRIME SOLENOID VALVE CIRCUITS/TRACTION CONTROL ISOLATION SOLENOID VALVE CIRCUITS

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C158F

Traction Control Front Prime Solenoid Valve Circuit

DTC C1590

Traction Control Front Isolation Solenoid Valve Circuit

DTC C1591

Traction Control Rear Prime Solenoid Valve Circuit

DTC C1592

Traction Control Rear Isolation Solenoid Valve Circuit

Diagnostic Fault Information

Circuit/System Description

The traction control prime (fill) and isolation (return) solenoid valves are located internally to the brake pressure modulator. The electronic brake control module activates the valve relay to supply voltage to the valve solenoids. This voltage is referred to as the system voltage. The electronic brake control module activates

individual valve solenoids by grounding the valve solenoid control circuits. This verification is used to perform hydraulic checks at the normally open base brake valve, the front hydraulic circuit and the block.

Conditions for Running the DTC

Vehicle ON or Vehicle in Service Mode. The ignition voltage is greater than 10 V.

Conditions for Setting the DTC

C158F

The electronic brake control module detects a general failure with the front hydraulic traction control circuit fill valve.

C1590

The electronic brake control module detects a general failure with the front hydraulic traction control circuit isolation valve.

C1591

The electronic brake control module detects a general failure with the rear hydraulic traction control circuit fill valve.

C1592

The electronic brake control module detects a general failure with the rear hydraulic traction control circuit isolation valve.

Action Taken When the DTC Sets

The ABS indicator turns ON.

The red brake indicator turns ON.

The traction/stability control indicator turns ON.

The Service Brake Assist and Service StabiliTrak messages are displayed on the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

1. Vehicle OFF and all vehicle systems OFF, disconnect the harness connector at the K17 Electronic Brake Control Module. It may take up to 2 min for all vehicle systems to power down.

2. Test for less than 10 Ω between the ground circuit terminals listed below and ground: Terminal 14

Terminal 46

If 10 Ω or greater

1. Vehicle OFF.

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

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

If less than 2 Ω, repair the open/high resistance in the ground connection.

If less than 10 Ω

3. Vehicle in Service Mode.

4. Verify that a test lamp illuminates between the B+ circuit terminals listed below and ground. Terminal 1

Terminal 30

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

1. Vehicle OFF.

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

If 2 Ω or greater, repair the open/high resistance or the short to ground in the circuit. If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.

If the test lamp illuminates

5. Vehicle in Service Mode.

6. Verify that a test lamp illuminates between the ignition circuit terminal 17 and ground.

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

1. Vehicle OFF.

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

If 2 Ω or greater, repair the open/high resistance or the short to ground in the circuit. If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.

If the test lamp illuminates

7. Replace the K17 Electronic Brake Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module replacement, programming and setup.

DTC C1594: ADAPTIVE CRUISE CONTROL BRAKING REQUEST - ACCELERATOR PEDAL POSITION NOT PLAUSIBLE

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C1594

Adaptive Cruise Control Braking Request - Accelerator Pedal Position Not Plausible

Circuit/System Description

Adaptive cruise control is allowed via serial data inputs from various modules to the active safety control module. The adaptive cruise control braking request signal is delivered from the active safety control module to the electronic brake control module (EBCM) via serial data.

Conditions for Running the DTC

Vehicle in Service Mode.

The ignition voltage is greater than 10 V.

Conditions for Setting the DTC

The electronic brake control module detects that the adaptive cruise control braking request signal value is not a continuous successor of the previous value.

Action Taken When the DTC Sets

The ABS indicator turns ON.

The MIL indicator may be on or flashing.

The traction control/stability control indicator turns ON.

The Service StabiliTrak message is displayed on the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Diagnostic Aids

Inspect the active safety control module for any DTCs.

Inspect the engine control module for any DTCs, specifically for accelerator pedal DTCs.

Circuit/System Verification

1. Vehicle in Service Mode.

2. Verify that no other DTCs are set except for C1594.

If any other DTCs are set

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

If no other DTCs are set

3. Replace the K17 Electronic Brake Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module or Engine Control Module replacement, programming and setup

DTC P0560, P0562, OR P0563: SYSTEM VOLTAGE

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0560

System Voltage

DTC P0562

System Low Voltage

DTC P0563

System High Voltage

Diagnostic Fault Information

Circuit/System Description

The electronic brake control module monitors two different blocks of memory to determine its capability to control the system shutdown process.

Conditions for Running the DTC

Vehicle ON or Vehicle in Service Mode.

Conditions for Setting the DTC

Keep alive voltage regulator not functional. Processor loses complete battery power.

Battery voltage is under 9 V and the vehicle is not moving.

Action Taken When the DTC Sets

A warning indicator may be displayed.

A driver information center message may be displayed.

The electronic brake control module disables ABS, traction control system and vehicle stability enhancement system for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

The electronic brake control module clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Check to ensure battery shunt is not opened.

Circuit/System Testing

1. Vehicle OFF and all vehicle systems OFF, disconnect the harness connector at the K17 Electronic Brake Control Module. It may take up to 2 min for all vehicle systems to power down.

2. Test for less than 10 Ω between the ground circuit terminals listed below and ground: Terminal 14

Terminal 46

If 10 Ω or greater

1. Vehicle OFF.

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

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

If less than 2 Ω, repair the open/high resistance in the ground connection.

If less than 10 Ω

3. Vehicle in Service Mode.

4. Verify that a test lamp illuminates between the B+ circuit terminals listed below and ground. Terminal 1

Terminal 30

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

1. Vehicle OFF.

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

If 2 Ω or greater, repair the open/high resistance or the short to ground in the circuit. If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.

If the test lamp illuminates

5. Vehicle in Service Mode.

6. Verify that a test lamp illuminates between the ignition circuit terminal 17 and ground.

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

1. Vehicle OFF.

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

If 2 Ω or greater, repair the open/high resistance or the short to ground in the circuit. If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.

If the test lamp illuminates

7. Replace the K17 Electronic Brake Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Electronic Brake Control Module replacement, programming and setup

DTC P05FF: BRAKE PRESSURE SENSOR AND BRAKE PEDAL POSITION SENSOR CORRELATION

Diagnostic Instructions

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P05FF

Brake Pressure Sensor / Brake Pedal Position Sensor Correlation

Circuit/System Description

The K177 Brake Booster Control Module has an internal brake travel sensor. The K17 Electronic Brake Control Module (EBCM) communicates with the K177 Brake Booster Control Module to determine if the amount of travel by the internal brake travel sensor is equal to the amount of expected pressure.

Conditions for Running the DTC

Vehicle in Service Mode.

Ignition voltage is greater than 10 V.

Conditions for Setting the DTC

The electronic brake control module detects the brake pressure is high when the internal brake travel sensor is reading low travel.

The electronic brake control module detects the brake pressure is low when the internal brake travel sensor is reading high travel.

Action Taken When the DTC Sets

The ABS indicator turns ON.

The red brake indicator turns ON.

The traction/stability control indicator turns ON.

The Service Brake Assist and Service StabiliTrak messages are displayed on the driver information center.

The electronic brake control module disables the ABS, the traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

The condition for setting he DTC is no longer present.

The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

ABS Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Verify no other DTCs are set.

If any DTCs are set

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

If no DTCs are set

NOTE: To ensure the complete brake modulator and high pressure accumulator pressure relief procedure is allowed to occur; the brake controller must see 1 pedal apply with the propulsion system enabled, followed by a proper shutdown without applying the brake pedal.

2. Vehicle ON, apply and release the brake pedal.

NOTE: Vehicle OFF, without applying the brake pedal ensure the brake modulator and high pressure accumulator pressure relief occurs. This process will take approximately 1-3 minutes.

3. Vehicle OFF, without applying the brake pedal.

4. Remove the remote keyless entry transmitter and close all of the vehicle doors. Wait approximately 1-3 minutes until the brake modulator and the high pressure accumulator pressure relief is complete and the vehicle powers down.

5. Vehicle in Service Mode.

6. Verify the scan tool parameters listed below are within 0 - 2 mm of each other as the brake pedal is applied:

Input Rod Position Sensor.

Output Rod Position Sensor.

Brake Pedal Position Calculated from Input Rod Position Sensor 1. Brake Pedal Position Calculated from Input Rod Position Sensor 2. If the parameters are not within the specified range

Replace the K177 Brake Booster Control Module.

If the parameters are within the specified range

7. Inspect for binding brake pedal, correct mounting of the K177 Brake Booster Control Module, or for brake fluid leaks.

Were any of the above conditions found

Repair as necessary.

If no conditions were found

8. Perform a brake hydraulic system test, refer to Hydraulic Brake System Diagnosis .

If the brake hydraulic system test does not pass

Repair as necessary.

If the brake hydraulic system tests normal

9. Replace the K177 Brake Booster Control Module.

10. Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.

If the DTC sets

Replace the K17 Electronic Brake Control Module.

If the DTC does not set

11. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Control Module replacement, programming and setup.

DTC P0601-P0604, P0606, P060B, OR P062F: CONTROL MODULE (ELECTRONIC BRAKE CONTROL MODULE)

Diagnostic Instructions

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

Diagnostic Procedure Instructions provide an overview of each diagnostic category.

DTC Descriptors

DTC P0601

Control Module Read Only Memory Performance

DTC P0602

Control Module- Calibration Set 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 P060B

Control Module Analog to Digital Converter Performance

DTC P062F

Control Module Long Term Memory Performance

Circuit/System Description

The electronic brake control module (EBCM) detects an internal malfunction.

Conditions for Running the DTC

Vehicle ON or Vehicle in Service Mode. Ignition voltage is between 8 V and 16 V.

Conditions for Setting the DTC

The EBCM detects an internal failure or incomplete programming for more than 10 s.

Action Taken When the DTC Sets

The ABS indicator turns ON.