C0393

DTC C0393

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.



DTC Descriptors
DTC C0393 06
- Rear Axle Coupling Solenoid Control Circuit Short to Ground or Open

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




Diagnostic Fault Information






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

The ignition is ON.


Conditions for Setting the DTC


DTC C0393 06
* An open is detected on the high or low solenoid circuits.
* A short to ground is detected on the high or low solenoid circuit.


DTC C0393 0B

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


Action Taken When the DTC Sets

One or more of the following actions may occur:

* All Wheel Drive Off (AWD Disabled), DIC message
* Service All Wheel Drive (Service AWD), DIC message



Conditions for Clearing the DTC

* The condition for the DTC is no longer present.
* The DTC is not detected in 40 consecutive drive cycles.



Reference Information
Schematic Reference

All-Wheel Drive Schematics (Electrical Diagrams)
Connector End View Reference

Component Connector End Views
Description and Operation

All-Wheel Drive Description and Operation (All-Wheel Drive Description and Operation)
Electrical Information Reference

* Circuit Testing
* Connector Repairs
* Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information


Circuit/System Testing

1. Ignition OFF, disconnect the X1 harness connector at the rear differential clutch control module .
2. Ignition ON, verify a test lamp does not illuminate between the following control circuit terminals and ground:

* Solenoid high control circuit terminal 5
* Solenoid low control circuit 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 following control circuit terminals and ground:

* Solenoid high control circuit terminal 5
* Solenoid low control circuit 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 solenoid high control terminal 5 and the solenoid low control 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 clutch drum assembly.

5. If all circuits test normal, replace the rear differential clutch control module.



Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.


Differential Clutch Drum Assembly Replacement (Differential Clutch Drum Assembly Replacement)


Control Module References for CCM replacement, setup, and programming