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 C0393 06: Rear Axle Coupling coil Control Circuit Short to Ground or Open/High ResistanceDTC C0393 0B: Rear Differential coil Control Circuit Current Above Threshold
Diagnostic Fault Information
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
High Clutch coil Control Circuit | C0393 06 | C0393 06 | C0393 0B | -- |
Low Clutch coil Control Circuit | C0393 06 | C0393 06 | C0393 0B | -- |
Circuit/System Description
The rear differential clutch control module (RDCCM) provides a power and ground switching circuits to the (AWD) coil. The coil receives current from the RDCCM 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 clutch coil circuits. |
| • | A short to ground is detected on the high clutch coil 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
Connector End View Reference
Transfer Case Control Connector End Views
Description and Operation
All-Wheel Drive Description and Operation
Electrical Information Reference
Scan Tool Reference
Scan Tool Data List for Scan Tool Information
Circuit/System Testing
- Ignition OFF, disconnect the harness connector C1 at the rear differential clutch control module .
- Ignition ON, verify a test lamp does not illuminate between the following control circuit terminals 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 coil supply terminal 5 and the low reference circuit terminal 3.
- If all circuits test normal, replace the RDCCM.
| • | Coil supply circuit terminal 5 |
| • | Low reference circuit terminal 3 |
| ⇒ | If the test lamp illuminates, test the appropriate control circuit for a short to voltage. |
| • | Coil supply circuit terminal 5 |
| • | Low reference circuit terminal 3 |
| ⇒ | If less than the specified value, test the appropriate control 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 RDCCM replacement, setup, and programming
The temperature sensor and coil internal in the differential, and is replace as an assembly. Refer to Differential Replacement
