2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 821
C0407 04
The differential clutch pump current is less than 0.3 A for 30 seconds.
C0407 0B
The differential clutch pump current is greater than 7 A for greater than 2 seconds in 10 consecutive test cycles.
C0407 64
The differential clutch pump current is below a threshold at the end of a pump activation cycle in 30 consecutive test cycles. The measured current
is less than 1.5 A from the threshold. The threshold is temperature dependent.
Action Taken When the DTC Sets
C0407 02 and C0407 04
* All-wheel drive (AWD) is disabled
* Service Rear Axle is displayed on the driver information center.
C0407 0B and C0407 64
An error report entry is stored, no further action is performed.
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.
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
1. 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 C0407 64 is not set. If the DTC resets, proceed to Circuit System Testing.
瀚慖f a fluid level is above specifications, replace the rear differential assembly.
2. Engine running, observe the scan tool Rear Differential Clutch Pump Motor Current parameter. The parameter displayed should be between
2500-3500 mA when the pump is ON.
Circuit/System Testing
Important: The rear drive clutch solenoid valve is calibrated with and is part of the rear differential clutch control module. Both
