C0394

DTC C0394

Diagnostic Instructions

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

DTC Descriptor

DTC C0394 06

- Rear Differential Clutch Temperature Sensor Circuit

Diagnostic Fault Information





Circuit/System Description

The rear differential clutch control module (CCM) provides a power and ground circuits to the temperature sensor. When the temperature of the module is determined to be beyond its limits, the CCM will temporarily disable the rear drive system.

Conditions for Running the DTC

* The ignition is ON.
* Ignition voltage is greater than 9 volts.

Conditions for Setting the DTC

* An open is detected on the high or low temperature sensor circuits.
* A short to ground is detected on the high temperature sensor circuit.

Action Taken When the DTC Sets

One or more of the following actions may occur:

* All Wheel Drive Off (AWD Disabled).
* Service All Wheel Drive (Service AWD).

Conditions for Clearing the DTC

* The condition for the DTC is no longer present.
* The DTC is not detected in 100 consecutive drive cycles.

Reference Information

Schematic Reference

All-Wheel Drive Schematics

Connector End View Reference

Transfer Case Control Connector End Views

Electrical Information Reference

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

Scan Tool Reference

Scan Tool Data List for CCM

Circuit/System Verification

DTC C0394 06 will set as result of CCM temperature sensor or circuit failure, review the scan tool data list parameters

Circuit/System Testing

Important: It is recommend that Component Testing is performed before Circuit Testing when diagnosing the clutch control Solenoid.

1. Ignition OFF, disconnect the 5-way harness connector at the CCM.
2. Test for less than 5.0-10 ohm of resistance between the ground circuit terminal and ground.
^ If greater than 10 ohm, test the ground circuit for an open/high resistance.

3. Test for an open or short to ground in the signal circuit to the CCM temperature sensor.
^ If the circuit tests normal, replace the CCM temperature sensor.

^ If all the circuits tests normal, replace the CCM.

Repair Instructions

Control Module References for CCM replacement, setup, and programming

Repair Verification

Diagnostic Repair Verification