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 - AWD Coil CircuitDTC C0393 0B: Rear Axle Coupling Solenoid Control Circuit Current Above Threshold - AWD Coil Circuit
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
AWD Coil Supply Voltage Circuit | C0393 06 | C0393 06 | C0393 0B | -- |
Low Reference Circuit | -- | C0393 06 | -- | -- |
Circuit/System Description
The rear differential clutch control module (CCM) provides a power and ground switching circuits to the coil. The coil 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. |
| • | Ignition voltage is greater than 9 volts. |
Conditions for Setting the DTC
| • | An open is detected on the high or low coil circuits. |
| • | A short to ground is detected on the high or low coil 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 40 consecutive drive cycles. |
Reference Information
Schematic Reference
Connector End View Reference
Transfer Case Control Connector End Views
Electrical Information Reference
Scan Tool Reference
Circuit/System Testing
- Ignition OFF, disconnect the harness connector C2 at the rear differential clutch control module .
- Ignition ON, verify a test lamp does not illuminate between the AWD coil supply voltage circuit terminal 5 and ground:
- Ignition OFF, test for infinite resistance between the following control circuit terminals and ground:
- Test for less than 5.0 ohms of resistance between the AWD coil supply voltage circuit terminal 5 and the low reference circuit terminal 3.
- If all circuits test normal, replace the CCM.
| ⇒ | If the test lamp illuminates, test the AWD coil voltage supply circuit for a short to voltage. |
| • | AWD Coil supply voltage circuit terminal 5 |
| • | Low reference circuit terminal 3 |
| ⇒ | If less than the specified value, test the appropriate AWD coil circuit for a short to ground. |
| ⇒ | If greater than the specified range, test both control circuits for an open/high resistance. If the circuits test normal, replace the rear differential. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for CCM replacement, setup, and programming
The temperature sensor and coil internal in the differential, and is replace as an assembly. Refer to Differential Replacement
