The rear axle coupling solenoid valve is installed at the rear halfshaft leading to the rear left wheel. 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 limited slip differential. The locking level of the limited slip differential depends on the engagement of the clutch package.

The ignition is ON.

The rear differential clutch control module detects a short to ground on the high solenoid valve control circuit.

or

The rear differential clutch control module detects a current more than 5.7 A.

One or more of the following actions may occur:

Schematic Reference

Rear Axle Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

All-Wheel Drive Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Engine running, observe the scan tool Rear Differential Clutch Status parameter. The reading should be NORMAL when stationary.

1. Ignition OFF, inspect for damage of the wire, the solenoid or the housing.

⇒	If a damage is visible, replace the appropriate component.

2. Disconnect the X2 harness connector at the K47 Rear Differential Clutch Control Module.
3. Test for a infinite resistance between the control circuit terminal and ground.

⇒	If not within the specified range, test the control circuit for a short to ground. If the circuit tests normal, replace the Q49 Rear Axle Coupling Solenoid Valve.

4. If the circuit tests normal, replace the K47 Rear Differential Clutch Control Module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.