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 CircuitDTC 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 Coupling Solenoid Control Circuit | C0393 06 | C0393 06 | -- | -- |
Low Coupling Solenoid Control Circuit | -- | -- | -- | C0393 0B |
Circuit/System Description
The coupling control module (CCM) provides a power and ground circuits to the coupling solenoid. The coupling solenoid receives current from the CCM and converts that into torque through the clutch to the rear tires.
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 coupling solenoid circuits. |
| • | A short to ground is detected on the high coupling solenoid circuit. |
| • | An over current is detected on the Solenoid 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
Connector End View Reference
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
DTC C0393 will set as result of CCM Solenoid or circuit failure, test for power and ground circuits to the CCM.
| ⇒ | Repair the power or ground circuits. |
Circuit/System Testing
Important: It is recommend that Component Testing is performed before Circuit Testing when diagnosing the power vacuum booster Solenoid.
- Ignition OFF, disconnect the 5 way harness connector at the CCM.
- Test for less than 1 ohm between the ground circuit terminal and ground.
- Connect a test lamp between the Battery circuit terminal and the ground circuit terminal.
- Ignition ON, engine OFF. The test lamp should turn ON.
| ⇒ | If greater than 1 ohm, test the ground circuit for an open/high resistance. |
| ⇒ | If the test lamp is always ON, test the CCM circuits for an open or short to ground. If the circuit tests normal, replace the coupling control module (CCM). |
| ⇒ | If the test lamp is always OFF, test the Battery circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the coupling solenoid. |
Repair Instructions
Perform the Diagnostic System Check - Vehicle after completing the diagnostic procedure.
| • | Control Module References for CCM replacement, setup, and programming |
