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DTC C0394

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 Descriptor

DTC C0394 06: Rear Axle Coupling Solenoid Temperature Sensor Circuit Short to Ground or Open

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

AWD Fluid Temperature Sensor Signal

C0394 06

C0394 06

-

-

AWD Fluid Temperature Sensor Low Reference

-

C0394 06

-

-

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 or short to ground is detected on the temperature sensor circuits.

Action Taken When the DTC Sets

All wheel drive indicator illuminates.

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

Rear Axle Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Rear Drive Axle 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 wiring harness plug X2 at the rear differential clutch control module.
  2. Ignition ON, verify a test lamp does not illuminate between the signal circuit terminal 2 and ground.
    3. ⇒If the test lamp illuminates, test the signal circuit for a short to voltage.
  3. Ignition OFF, test for infinite resistance between the signal circuit terminal 2 and ground.
    4. ⇒If less than the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the rear wheel drive module clutch housing.
  4. Test for 310-113K ohms of resistance between the signal circuit terminal 2 and the low reference circuit terminal 4.
    5. ⇒If less than the specified range, test both circuits for a short together. If the circuits test normal, replace the rear wheel drive module clutch housing.
    ⇒If greater than the specified range, test both circuits for an open/high resistance. If the circuits test normal, replace the rear wheel drive module clutch housing.
  5. If all circuits test normal, replace the CCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Rear Wheel Drive Module Clutch Housing Replacement
    • Control Module References for CCM replacement, setup, and programming
   


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