2010 Cadillac Truck SRX AWD V6-3.0L Page 814
battery voltage to the control circuit and ground to the low reference circuit of the solenoid valve. The solenoid valve is controlled by a pulse width
modulation (PWM) signal. The solenoid valve controls the hydraulic pressure to the clutch package of the rear differential. The locking level of the
limited slip differential depends on the engagement of the clutch package.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
* The rear differential clutch control module detects a short to ground on the rear differential clutch solenoid valve control circuit.
* The rear differential clutch control module detects a current greater than 5.7 A on the rear differential clutch solenoid valve control circuit.
Action Taken When the DTC Sets
One or more of the following actions may occur:
* All-wheel drive (AWD) is disabled.
* Service Rear Axle is displayed on the driver information center.
Conditions for Clearing the DTC
* The condition for setting the DTC is no longer present.
* The DTC is not detected in 40 consecutive ignition cycles.
Diagnostic Aids
The rear differential clutch solenoid valve harness and differential clutch pump motor harness are all one assembly as part of the differential clutch
pump motor. These harnesses should not be repaired and should be replaced if a wiring condition exists.
Reference Information
Schematic Reference
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
Engine running, observe the scan tool Rear Differential Clutch Status parameter. The scan tool should display NORMAL when stationary.
Circuit/System Testing
Important: 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.
1. Ignition OFF, disconnect the X2 harness connector at the K47 rear differential clutch control module.
2. Test for a infinite resistance between the control circuit terminal 3 and ground.
瀚慖f not the specified value, test the control circuit for a short to ground. If a short to ground is present, replace the M32 oil pump
motor/harness assembly. If the circuit tests normal, replace the Q49 rear differential clutch solenoid valve.
