Diagnostic Instructions

DTC Descriptors

DTC C0393 06:  Rear Axle Coupling Solenoid Control Circuit Short to Ground or Open/High Resistance

DTC C0393 0B:  Rear Axle Coupling Solenoid Control Circuit Current Above Threshold

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
High Clutch Solenoid Control	C0393 06	C0393 06	C0393 0B	--
Low Clutch Solenoid Control	C0393 06	C0393 06	C0393 0B	--

Circuit/System Description

The rear differential clutch control module (CCM) provides a power and ground switching circuits to the solenoid. The solenoid receives current from the CCM through PWM low side driver, and converts that signal into torque through the clutch to the rear tires when all wheel drive (AWD) is requested.

Conditions for Running the DTC

Conditions for Setting the DTC

C0393 06

An open or short to ground is detected on the high or low solenoid circuits.

C0393 0B

A short to voltage is detected on the high or low solenoid circuits.

Action Taken When the DTC Sets

All wheel drive indicator illuminates.

Conditions for Clearing the DTC

Reference Information

Schematic Reference

All-Wheel Drive 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

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector X2 at the rear differential clutch control module.
2. Ignition ON, verify a test lamp does not illuminate between the control circuit terminals listed below and ground:

•	terminal 5

•	terminal 3

⇒	If the test lamp illuminates, test the appropriate control circuit for a short to voltage.

3. Ignition OFF, test for infinite resistance between the control circuit terminals listed below and ground:

•	terminal 5

•	terminal 3

⇒	If less than the specified value, test the appropriate control circuit for a short to ground.

4. Test for less than 5 ohms between the control circuit terminal 5 and control circuit terminal 3.

⇒	If greater than the specified range, test both control circuits for an open/high resistance. If the circuits test normal, replace the differential rear wheel drive module clutch housing solenoid.

5. If all circuits test normal, replace the CCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.