For 1990-2009 cars only
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 C0550 39: Electronic Control Unit (ECU) PerformanceDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Electronic Control Unit (ECU) Performance | -- | -- | -- | C0550 39 |
Circuit/System Description
The coupling control module (CCM) detects an internal malfunction.
Conditions for Running the DTC
The ignition switch is in the ON position.
Conditions for Setting the DTC
An internal EBCM malfunction exists.
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
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
DTC C0550 will set as result of internal (CCM) circuit failure.
| ⇒ | Replace the CCM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for CCM replacement, setup, and programming
