2010 Cadillac Truck SRX FWD V6-3.0L Page 824
* 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 Drive Clutch Status parameter. The scan tool should display TEMPORARILY LIMITED 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 differential clutch
pump/harness assembly. If the circuit tests normal, replace the Q49 rear differential clutch solenoid valve.
3. Test for 2-4 ohm between the control circuit terminal 3 and the ground reference circuit terminal 4.
瀚慖f not within the specified range, replace the Q49 rear differential clutch solenoid valve.
4. Replace the K47 rear differential clutch control module.
C0408 61
1. Replace the Q49 rear differential clutch solenoid valve.
2. Ignition ON, verify the DTC does not reset.
瀚慖f the DTC resets, replace the K47 rear differential clutch control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Limited Slip Differential Clutch Valve Replacement ()
* Differential Clutch Pump Replacement (See: Transmission and Drivetrain/Differential Assembly/Differential Clutch/Service and
Repair/Differential Clutch Pump Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for rear differential clutch control module
replacement, setup, and programming
C0450
DTC C0450
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 Descriptor
DTC C0450 00
- Steering Assist Control Solenoid Valve Circuit Malfunction
