2010 Cadillac Truck SRX AWD V6-3.0L Page 820
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 C0406 is not set.
If the DTC is set, 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
C0407
DTC C0407
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC C0407 02
- AWD Oil Pump Motor Short to Ground
DTC C0407 04
- AWD Oil Pump Motor Open
DTC C0407 0B
- AWD Oil Pump Motor High Current
DTC C0407 64
- AWD Oil Pump Motor Component Slipping
Diagnostic Fault Information
Circuit/System Description
The differential clutch pump delivers hydraulic oil pressure to the rear drive clutch solenoid valve and the rear differential clutch solenoid valve.
The pump is mounted to the torque transfer device housing. The pressure of the system is calculated by the rear differential clutch control module
which monitors the differential clutch pump motor current levels. When the pressure reaches approximately 3200 kPa (464 psi), the rear differential
clutch control module determines that the system pressure has been obtained and deactivates the differential clutch pump. When the pressure drops
below approximately 2700 kPa (392 psi), the rear differential clutch control module will reactivate the differential clutch pump.
Conditions for Running the DTC
* The ignition is ON.
* Operating temperature range 0-80掳C (0-176掳F).
Conditions for Setting the DTC
C0407 02
The differential clutch pump current is greater than 9 A in 20 consecutive test cycles. The current will be retested every 30 seconds.
