The hydraulic pump delivers both solenoid valves with hydraulic oil pressure, the transfer solenoid valve and if installed the rear differential clutch solenoid valve. The pump is installed in the torque transfer device housing. The pressure of the system is calculated by means of the rear differential clutch control module measuring the motors power consumption. When the pressure reaches approximately 3200 kPa (464 PSI) the rear differential clutch control module recognizes that the system pressure has been reached. The pump is shut down. If a voltage is detected after the pump is shut down after a certain limit an error is detected. The pump is spinning backwards.

A test voltage is applied to the transfer case solenoid valve. An error is detected if the resultant current is greater than the current which corresponds to less than 2 Ω in the solenoid valve.

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 diagnostic tester information

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

1. Ignition OFF, replace the oil filter in the torque transfer device housing.
2. Ignition ON, drive the car under normal conditions. Verify the DTC does not reset.

⇒	If the DTC resets, replace the K47 Rear Differential Clutch Control Module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.