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‌SPECIFICATIONS

FASTENER SPECIFICATIONS

ACCESSORIES & EQUIPMENT

Bumpers and Fascias - Volt

Reusable Threaded Fastener Tightening Specifications

SCHEMATIC WIRING DIAGRAMS

ACTIVE GRILLE AIR SHUTTER WIRING SCHEMATICS

Active Grille Air Shutter

Fig. 1: Active Grille Air Shutter

Courtesy of GENERAL MOTORS COMPANY

DIAGNOSTIC INFORMATION AND PROCEDURES

DTC P059F OR P151E: ACTIVE GRILLE AIR SHUTTER

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 P059F

Active Grille Air Shutter 1 Performance

DTC P151E

Active Grille Air Shutter Actuator 1 Signal Message Counter Incorrect

Diagnostic Fault Information

Circuit/System Description

The active grille air shutter actuator closes louvers at the front bumper to enhance vehicle aerodynamics in driving situations where cooling and A/C loads are relatively low and high levels of front end airflow are not required. If high levels of airflow are required the active grille air shutter actuator opens the louvers. The Local Interconnect Network (LIN) Serial Data Bus signal from the engine control module, ignition and ground circuits enable the active grille air shutter actuator to operate. If the conditions for opening the louvers are reached the engine control module commands the active grille air shutter actuator to open the louvers.

Conditions for Running the DTC

Ignition On/Vehicle in Service Mode.

The battery voltage is greater than 10 V.

The DTC runs continuously when the above conditions are met.

Conditions for Setting the DTC

The DTC P059F will be set during a key cycle when the commanded louver position can not be achieved after 5 attempts are made to move the louver. The DTC will be stored as current for this key cycle but the malfunction indicator lamp (MIL) will not be illuminated. The malfunction indicator lamp will illuminate in the second key cycle after a failed movement attempt is made in each of two back to back key cycles.

The DTC P151E will set if there is a serial data communication failure.

Action Taken When the DTC Sets

DTC P059F and P151E are type B DTCs.

Conditions for Clearing the DTC

DTC P059F and P151E are type B DTCs.

Reference Information

Schematic Reference

Active Grille Air Shutter Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Active Grille Air Shutter 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/Vehicle in Service Mode.

2. Verify DTC U1510 is not set.

If DTC U1510 is set

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

If DTC U1510 is not set

3. Verify the active grille air shutter position parameter changes from 0% (fully closed) to 100% (fully open) when using the scan tool ECM Active Grille Air Shutter Position control function.

If the louvers at the front bumper do not open and close

Refer to Circuit/System Testing.

If the louvers at the front bumper open and close

4. Verify none of the following conditions are present:

Snow or ice packed in the front fascia which prevents the louvers from moving. Debris or foreign objects which prevent the louvers from moving.

If any of the conditions are present

Clear any snow, ice or foreign objects from the front grille.

If none of the conditions are present

5. All OK

Circuit/System Testing

1. Ignition/Vehicle Off and all vehicle systems Off, disconnect the harness connector(s) at the active grille air shutter actuator(s). 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 and ground.

If 10 Ω or greater

1. Ignition/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. Ignition On/Vehicle in Service Mode.

4. Verify a test lamp illuminates between the ignition circuit and ground.

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

1. Ignition/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 in the circuit.

If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse. Refer to Power Mode Mismatch .

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

1. Ignition/Vehicle Off.

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 the test lamp illuminates

5. Ignition/Vehicle Off, disconnect the harness connector at the K20 Engine Control Module.

1. Test for infinite resistance between the LIN Serial Data Bus circuit and ground. If less than infinite resistance, repair the short to ground on the circuit.

If infinite resistance

2. Test for less than 2 Ω in the LIN Serial Data Bus circuit end to end. If 2 Ω or greater, repair the open/high resistance in the circuit. If less than 2 Ω

3. Test for less than 1 V between the LIN Serial Data Bus circuit and ground. If 1 V or greater, repair the short to voltage on the circuit.

If less than 1 V

6. Test or replace the M60A Active Grille Air Shutter 1 Motor Module.

7. Verify DTCs P059F, P151E or U1510 are not set while operating the vehicle under the conditions for setting the DTC.

If the DTC is set

Replace the K20 Engine Control Module.

If the DTC is not set

8. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

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

SYMPTOMS - ACTIVE GRILLE AIR SHUTTER

NOTE: The following steps must be completed before using the symptom tables:

1. Perform the Diagnostic System Check - Vehicle before using the Symptom Tables in order to verify that all of the following are true:

There are no DTCs set.

The control modules can communicate via the serial data link.

2. Review the system operation in order to familiarize yourself with the system functions. Refer to Active Grille Air Shutter Description and Operation.

Visual/Physical Inspection

Inspect for aftermarket devices which may affect the operation of the system. Refer to Checking Aftermarket Accessories .

Inspect the easily accessible or visible system components for obvious damage or conditions which may cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

Active Grille Air Shutter 1 Malfunction

ACTIVE GRILLE AIR SHUTTER 1 MALFUNCTION

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 P059F

Active Grille Air Shutter 1 Performance

DTC P151E

Active Grille Air Shutter Actuator 1 Signal Message Counter Incorrect

Diagnostic Fault Information

Circuit/System Description

The active grille air shutter actuator closes louvers at the front bumper to enhance vehicle aerodynamics in driving situations where cooling and A/C loads are relatively low and high levels of front end airflow are not required. If high levels of airflow are required the active grille air shutter actuator opens the louvers. The Local Interconnect Network (LIN) Serial Data Bus signal from the engine control module, ignition and ground circuits enable the active grille air shutter actuator to operate. If the conditions for opening the louvers are reached the engine control module commands the active grille air shutter actuator to open the louvers.

Conditions for Running the DTC

Ignition On/Vehicle in Service Mode.

The battery voltage is greater than 10 V.

The DTC runs continuously when the above conditions are met.

Conditions for Setting the DTC

The DTC P059F will be set during a key cycle when the commanded louver position can not be achieved after 5 attempts are made to move the louver. The DTC will be stored as current for this key cycle but the malfunction indicator lamp (MIL) will not be illuminated. The malfunction indicator lamp will illuminate in the second key cycle after a failed movement attempt is made in each of two back to back key cycles.

The DTC P151E will set if there is a serial data communication failure.

Action Taken When the DTC Sets

DTC P059F and P151E are type B DTCs.

Conditions for Clearing the DTC

DTC P059F and P151E are type B DTCs.

Reference Information

Schematic Reference

Active Grille Air Shutter Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Active Grille Air Shutter 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/Vehicle in Service Mode.

2. Verify DTC U1510 is not set.

If DTC U1510 is set

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

If DTC U1510 is not set

3. Verify the active grille air shutter position parameter changes from 0% (fully closed) to 100% (fully open) when using the scan tool ECM Active Grille Air Shutter Position control function.

If the louvers at the front bumper do not open and close

Refer to Circuit/System Testing.

If the louvers at the front bumper open and close

4. Verify none of the following conditions are present:

Snow or ice packed in the front fascia which prevents the louvers from moving. Debris or foreign objects which prevent the louvers from moving.

If any of the conditions are present

Clear any snow, ice or foreign objects from the front grille.

If none of the conditions are present

5. All OK

Circuit/System Testing

1. Ignition/Vehicle Off and all vehicle systems Off, disconnect the harness connector(s) at the active grille air shutter actuator(s). 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 and ground.

If 10 Ω or greater

1. Ignition/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. Ignition On/Vehicle in Service Mode.

4. Verify a test lamp illuminates between the ignition circuit and ground.

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

1. Ignition/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 in the circuit.

If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse. Refer to Power Mode Mismatch .

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

1. Ignition/Vehicle Off.

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 the test lamp illuminates

5. Ignition/Vehicle Off, disconnect the harness connector at the K20 Engine Control Module.

1. Test for infinite resistance between the LIN Serial Data Bus circuit and ground. If less than infinite resistance, repair the short to ground on the circuit.

If infinite resistance

2. Test for less than 2 Ω in the LIN Serial Data Bus circuit end to end. If 2 Ω or greater, repair the open/high resistance in the circuit. If less than 2 Ω

3. Test for less than 1 V between the LIN Serial Data Bus circuit and ground. If 1 V or greater, repair the short to voltage on the circuit.

If less than 1 V

6. Test or replace the M60A Active Grille Air Shutter 1 Motor Module.

7. Verify DTCs P059F, P151E or U1510 are not set while operating the vehicle under the conditions for setting the DTC.

If the DTC is set

Replace the K20 Engine Control Module.

If the DTC is not set

8. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

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

REPAIR INSTRUCTIONS

FRONT BUMPER FASCIA ENERGY ABSORBER REPLACEMENT

Fig. 2: Front Bumper Fascia Energy Absorber Courtesy of GENERAL MOTORS COMPANY

FRONT BUMPER IMPACT ABSORBER REPLACEMENT

Fig. 3: Front Bumper Impact Absorber Courtesy of GENERAL MOTORS COMPANY

FRONT BUMPER IMPACT BAR REPLACEMENT

Fig. 4: Front Bumper Impact Bar

Courtesy of GENERAL MOTORS COMPANY

FRONT BUMPER FASCIA REMOVAL AND INSTALLATION

Fig. 5: Front Bumper Fascia

Courtesy of GENERAL MOTORS COMPANY

FRONT BUMPER FASCIA GUIDE REPLACEMENT

Fig. 6: Front Bumper Fascia Guide

Courtesy of GENERAL MOTORS COMPANY

FRONT BUMPER FASCIA CENTER SUPPORT REPLACEMENT

Fig. 7: Front Bumper Fascia Center Support Courtesy of GENERAL MOTORS COMPANY

FRONT BUMPER SHUTTER REPLACEMENT

Fig. 8: Front Bumper Shutter

Courtesy of GENERAL MOTORS COMPANY

FRONT BUMPER FASCIA LOWER STIFFENER REPLACEMENT

Fig. 9: Front Bumper Fascia Lower Stiffener (Center) Courtesy of GENERAL MOTORS COMPANY

FRONT BUMPER FASCIA CENTER AIR DEFLECTOR REPLACEMENT

Fig. 10: Front Bumper Fascia Center Air Deflector Courtesy of GENERAL MOTORS COMPANY

REAR BUMPER FASCIA REMOVAL AND INSTALLATION

Fig. 11: Rear Bumper Fascia

Courtesy of GENERAL MOTORS COMPANY

REAR BUMPER FASCIA GUIDE REPLACEMENT

Fig. 12: Rear Bumper Fascia Guide

Courtesy of GENERAL MOTORS COMPANY

REAR BUMPER UPPER FASCIA REPLACEMENT

Fig. 13: Rear Bumper Upper Fascia

Courtesy of GENERAL MOTORS COMPANY

REAR BUMPER LOWER FASCIA REPLACEMENT

Fig. 14: Rear Bumper Lower Fascia

Courtesy of GENERAL MOTORS COMPANY

REAR BUMPER ENERGY ABSORBER REPLACEMENT

Fig. 15: Rear Bumper Energy Absorber Courtesy of GENERAL MOTORS COMPANY

REAR BUMPER IMPACT BAR REPLACEMENT

Fig. 16: Rear Bumper Impact Bar

Courtesy of GENERAL MOTORS COMPANY

DESCRIPTION AND OPERATION

ACTIVE GRILLE AIR SHUTTER DESCRIPTION AND OPERATION

The active grille air shutter system closes shutters in the front grille to enhance vehicle aerodynamics in driving situations where cooling and A/C loads are relatively low and high levels of front end airflow are not required.

If high levels of airflow are required the active grille air shutter system will open one or both shutters. The control signal from the engine control module, ignition and ground circuits enable the active grille air shutter actuators to operate. If the conditions for opening the shutters are reached the engine control module commands the active grille air shutter actuators to open one or both shutters.

The dual active grille air shutter system consists of two aero shutter mechanisms located in the front grille for controlling the amount of air flowing through the grille. It includes three wires; ground, power and a Local Interconnect Network (LIN) Bus serial data circuit from the engine control module to the shutter actuator. The engine control module determines shutter state based on various vehicle conditions such as vehicle speed, coolant temperature, fan state, refrigerant system pressure, A/C compressor state and ambient temperature. The engine control module has the ability to command each shutter individually to the open or closed positions through communications on the LIN Bus.

The actuators are powered by an ignition circuit that is active when the key is in the RUN position. The vehicle may have to be driven for up to 13 minutes at speeds greater than 41 km/h (25 mph) before a shutter begins to move. If low ambient temperature is detected, the shutters will remain in the closed position.

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