2010 Cadillac Truck SRX FWD V6-3.0L Page 815

2010 Cadillac Truck SRX FWD V6-3.0L Page 815

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.

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

C0402

DTC C0402

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 C0402 02

- Transfer Case Solenoid Valve Short to Ground

DTC C0402 04

- Transfer Case Solenoid Valve Open

DTC C0402 42

- Transfer Case Solenoid Valve Calibration Not Programmed

DTC C0402 43

- Transfer Case Solenoid Valve EEPROM Incorrect Programming

DTC C0402 4B

- Transfer Case Solenoid Valve Calibration Not Learned

DTC C0402 61

- Transfer Case Solenoid Valve Stuck

Diagnostic Fault Information

Circuit/System Description

The rear drive clutch solenoid valve is internal to the torque transfer device housing. The rear differential clutch control module supplies 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 torque transfer device. The locking level

of the torque transfer device depends on the engagement of the clutch package.

Conditions for Running the DTC

C0402 02, C0402 42, C0402 43 and C0402 4B

* The ignition is ON.

* The circuits are tested during start up of the rear differential clutch control module.