Buick Enclave: Specifications, Diagnostic Information and Procedures
SPECIFICATIONS
FASTENER TIGHTENING SPECIFICATIONS
Fastener Tightening Specifications
DIFFERENTIAL CARRIER ASSEMBLY SPECIFICATIONS
Differential Carrier Assembly Specifications
ADHESIVES, FLUIDS, LUBRICANTS AND SEALERS
Adhesives, Fluids, Lubricants and Sealers
SCHEMATIC WIRING DIAGRAMS
REAR AXLE WIRING SCHEMATICS
MH6
Fig. 1: MH6 Wiring Schematics
DIAGNOSTIC INFORMATION AND PROCEDURES
DIAGNOSTIC CODE INDEX
DTC C0393: REAR AXLE COUPLING SOLENOID
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 C0393 06
- Rear Axle Coupling Solenoid Control Circuit Short to Ground or Open
DTC C0393 0B
- Rear Axle Coupling Solenoid Control Circuit Current Above Threshold
Diagnostic Fault Information
Circuit/System Description
The rear differential clutch control module (CCM) provides a power and ground switching circuits to the solenoid. The solenoid receives current from the CCM through PWM low side driver and converts that signal into torque through the clutch to the rear tires when all wheel drive (AWD) is requested.
Conditions for Running the DTC
Ignition ON.
Conditions for Setting the DTC
C0393 06
- An open is detected on the high or low solenoid circuits.
- A short to ground is detected on the high or low solenoid circuit.
C0393 0B
A short to voltage is detected on the high or low solenoid circuit.
Action Taken When the DTC Sets
One or more of the following actions may occur:
- All Wheel Drive Off (AWD Disabled), DIC message
- Service All Wheel Drive (Service AWD), DIC message
Conditions for Clearing the DTC
- The condition for the DTC is no longer present.
- The DTC is not detected in 40 consecutive drive cycles.
Reference Information
Schematic Reference
Rear Axle Schematics
Connector End View Reference
COMPONENT CONNECTOR END VIEWS - INDEX
Description and Operation
Rear Drive Axle 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 OFF, disconnect the X1 harness connector at the rear differential clutch control module.
2. Ignition ON, verify a test lamp does not illuminate between the control circuit terminals listed below and ground:
- terminal 5
- terminal 3
- If the test lamp illuminates, test the appropriate control circuit for a short to voltage.
3. Ignition OFF, test for infinite resistance between the control circuit terminals listed below and ground:
- terminal 5
- terminal 3
- If less than the specified value, test the appropriate control circuit for a short to ground.
4. Test for less than 5 ohms between the control circuit terminal 5 and control circuit terminal 3.
- If greater than 5 ohms, test both control circuits for an open/high resistance and repair as necessary.
- If 5 ohms or less, replace the differential clutch drum assembly.
5. With a scan tool, clear DTCs and retest vehicle.
- If the DTC returns, replace the K47 Rear Differential Clutch Control Module.
- If the DTC does not return, all OK.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
- Differential Clutch Drum Assembly Replacement
- Control Module References for CCM replacement, setup and programming
DTC C0394: REAR AXLE COUPLING SOLENOID TEMPERATURE 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 Descriptor
DTC C0394 06
- Rear Axle Coupling Solenoid Temperature Sensor Circuit Short to Ground or Open
Diagnostic Fault Information
Circuit/System Description
The rear differential clutch control module (CCM) provides a power and ground circuits to the temperature sensor. When the temperature of the module is determined to be beyond its limits, the CCM will temporarily disable the rear drive system.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
An open or short to ground is detected on the temperature sensor circuits.
Action Taken When the DTC Sets
One or more of the following actions may occur:
- All Wheel Drive Off (AWD Disabled), DIC message
- Service All Wheel Drive (Service AWD), DIC message
Conditions for Clearing the DTC
- The condition for the DTC is no longer present.
- The DTC is not detected in 40 consecutive drive cycles.
Reference Information
Schematic Reference
Rear Axle Schematics
Connector End View Reference
COMPONENT CONNECTOR END VIEWS - INDEX
Description and Operation
Rear Drive Axle 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 OFF, disconnect the X1 harness connector at the rear differential clutch control module.
2. Ignition ON, verify a test lamp does not illuminate between the signal circuit terminal 2 and ground:
- If the test lamp illuminates, test the signal circuit for a short to voltage.
3. Ignition OFF, test for infinite resistance between the signal circuit terminal 2 and ground:
- If less than the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the clutch assembly.
4. Test for 310-113K ohms between the signal circuit terminal 2 and the low reference circuit terminal 4.
- If less than the specified range, test both circuits for a short together. If the circuits test normal, replace the differential clutch drum assembly.
- If greater than the specified range, test both circuits for an open/high resistance. If the circuits test normal, replace the differential clutch drum assembly.
5. If all circuits test normal, replace the rear differential clutch control module.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
- Differential Clutch Drum Assembly Replacement
- Control Module References for rear differential clutch control module replacement, setup and programming
DTC C0558: CALIBRATION DATA NOT PROGRAMMED
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 C0558 4B
- Calibration Data Not Programmed
Circuit/System Description
The rear differential clutch control module (CCM) is required to have the correct calibration data (matching ID) stored in the memory from the AWD coupling control and is part of the programming used to perform all wheel drive functions.
Conditions for Running the DTC
Ignition voltage is greater than 9 volts.
Conditions for Setting the DTC
The calibration data (matching ID) of the CCM is not programmed or incorrectly programmed.
Action Taken When the DTC Sets
One or more of the following actions may occur:
- All Wheel Drive Off (AWD Disabled), DIC message
- Service All Wheel Drive (Service AWD), DIC message
Conditions for Clearing the DTC
- The condition for the DTC is no longer present.
- The DTC is not detected in 40 consecutive drive cycles.
Reference Information
Schematic Reference
Rear Axle Schematics
Connector End View Reference
COMPONENT CONNECTOR END VIEWS - INDEX
Description and Operation
Rear Drive Axle 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
Verify that DTC C0558 is not set.
- If the DTC is set, calibrate the CCM. If the DTC resets, replace the CCM.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for CCM replacement, setup and programming
DTC C0561: SYSTEM DISABLED INFORMATION STORED INVALID SERIAL DATA RECEIVED
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 C0561 71
- System Disabled Information Stored Invalid Serial Data Received
Circuit/System Description
The rear differential clutch control module (CCM) receives messages from other modules over serial data which are needed to perform all wheel drive functions.
Conditions for Running the DTC
Ignition voltage is greater than 9.5 volts.
Conditions for Setting the DTC
The CCM receives an invalid message from the ECM or EBCM, over serial data which causes the CCM to deactivate.
Action Taken When the DTC Sets
One or more of the following actions may occur:
- All Wheel Drive Off (AWD Disabled), DIC message.
- Service All Wheel Drive (Service AWD), DIC message.
Conditions for Clearing the DTC
- The condition for the DTC is no longer present.
- The DTC is not detected in 40 consecutive drive cycles.
Diagnostic Aids
DTC C0561 is an indicator that the CCM receives an invalid message from the ECM or EBCM and does not necessarily indicate a fault is present with the CCM. This DTC should not be used as a fault indicator, but rather as a symptom to assist in the diagnosis of these other systems.
Reference Information
Schematic Reference
Rear Axle Schematics
Connector End View Reference
COMPONENT CONNECTOR END VIEWS - INDEX
Description and Operation
Rear Drive Axle 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
Verify that no DTCs are set in the ECM or EBCM.
- If DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle.
SYMPTOMS - REAR DIFFERENTIAL CARRIER
Strategy Based Diagnostics
Review the system operations in order to familiarize yourself with the system functions. Refer to Rear Drive Axle Description and Operation and Transfer Case Description and Operation. All diagnosis on a vehicle should follow a logical process. Strategy based diagnostics is a uniform approach for repairing all systems. The diagnostic flow may always be used in order to resolve a system condition. The diagnostic flow is the place to start when repairs are necessary. For a detailed explanation, refer to Strategy Based Diagnosis.
Visual/Physical Inspection
- Inspect for aftermarket devices, which could affect the operation of the vehicle. Refer to Checking Aftermarket Accessories.
- Inspect the easily accessible or visible system components for obvious damage or conditions, which could cause the symptom.
- Check for the correct lubricant level and the proper viscosity.
- Verify the exact operating conditions under which the concern exists. Note factors such as vehicle speed, road conditions, ambient temperature and other specifics.
- Compare the driving characteristics or sounds, if applicable, to a known good vehicle and make sure you are not trying to correct a normal condition.
- Inspect for all-wheel drive activation and operation. Refer to All-Wheel Drive (AWD) System
- Functional Inspection.
- Factors that may contribute to an inoperative rear differential include:
- Low gear oil levels
- Differential inoperative due to anti-lock brake system (ABS) function
- Inoperative powertrain control module (PCM) and/or wiring system
- A mini-spare or different size tire installed
- A fluid over-temperature condition
- An inoperative or "stuck" clutch pump check valve
- A defective rear differential assembly
- An inoperative transfer case assembly
Intermittent
Test the vehicle under the same conditions that the customer reported in order to verify the system is operating properly.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
- Symptoms - Vehicle
- All-Wheel Drive (AWD) System Functional Inspection
- Noisy in Drive
- Noisy When Coasting
- Intermittent Noise
- Constant Noise
- Noisy on Turns
- Rear Differential Carrier Leak Diagnosis
ALL-WHEEL DRIVE (AWD) SYSTEM FUNCTIONAL INSPECTION
Functional Test
Rear axle activation and operation may be checked by positioning the four wheels off the ground, starting the vehicle, fully applying the parking brake and selecting the drive position.
CAUTION: Avoid rear differential damage. Do not exceed 20 percent accelerator pedal application or apply throttle for more than 5 seconds while the parking brake is applied.
Lightly depress the accelerator pedal while watching the rear wheels. They will rotate slightly as the drive line winds-up. This indicates the all wheel drive (AWD) is functioning.
NOISY IN DRIVE
Noisy in Drive
NOISY WHEN COASTING
Noisy When Coasting
INTERMITTENT NOISE
Intermittent Noise
CONSTANT NOISE
Constant Noise
NOISY ON TURNS
Noisy on Turns
REAR DIFFERENTIAL CARRIER LEAK DIAGNOSIS
Rear Differential Carrier Leak Diagnosis
