2010 Cadillac Truck SRX FWD V6-3.0L Page 769
Rear Axle Schematics (See: Transmission and Drivetrain/Differential Assembly/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Description and Operation
Rear Drive Axle Description and Operation (See: Transmission and Drivetrain/Differential Assembly/Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
1. Engine running, observe the scan tool Rear Drive Clutch Status parameter. The scan tool should display TEMPORARILY LIMITED when
stationary.
2. Verify that the following DTC's are not set along with DTC C039F:
* C0402
* C0403
* C0406
* C0407
瀚慖f any of the DTCs listed are set, diagnose those codes first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic
Trouble Code Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).
3. Ensure that all differential fluid levels are at the proper levels. Refer to Rear Axle Lubricant Level Inspection (See:
Maintenance/Fluids/Fluid - Differential/Service and Repair/Procedures) and Differential Clutch Oil Inspection (See: Transmission and
Drivetrain/Differential Assembly/Differential Clutch/Service and Repair/Differential Clutch Oil Inspection).
瀚慖f a fluid level is below specifications, inspect the rear differential assembly for leaks and repair as necessary. Refill to the proper level,
clear codes, and road test. Verify that DTC C039F is not set. If the DTC resets, proceed to Circuit System Testing.
Circuit/System Testing
Note: The rear drive clutch solenoid valve is calibrated with and is part of the rear differential clutch control module. Both components must be
replaced as a matched set.
Verify DTC C039F is not set.
If the DTC is set, inspect the rear differential assembly for internal or external mechanical damage and repair as necessary. Clear codes and road
test. Verify that DTC C039F is not set. If the DTC resets, replace the K47 rear differential clutch control module/Q48 rear drive clutch solenoid
valve assembly.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
Control Module References (See: Testing and Inspection/Programming and Relearning) for rear differential clutch control module replacement,
setup, and programming
C0040
DTC C0035, C0040, C0045, or C0050
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
