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 provide an overview of each diagnostic category. |
DTC Descriptor
DTC C056D 39: ECU Hardware Performance Internal Electronic FailureCircuit/System Description
The power steering control module (PSCM) continuously monitors the internal circuitry within the module.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
This DTC will set if the PSCM detects an internal malfunction within the module.
Actions Taken When DTC Sets
| • | DTC C056D is stored in memory. |
| • | The driver information center (DIC) displays the SERVICE POWER STEERING warning message. |
| • | No steering assist. |
Conditions for Clearing the DTC
| • | A current DTC will clear on the next malfunction free ignition cycle. |
| • | A history DTC will clear after 100 consecutive malfunction-free ignition cycles, without the repeat of the internal malfunction. |
Reference Information
Schematic Reference
Connector End View Reference
Power Steering Connector End Views
Description and Operation
Power Steering System Description and Operation
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
- Verify that DTC C056E is not set.
- Replace the PSCM.
| ⇒ | If DTC C056E is set, program the PSCM. If DTC C056D resets, replace the PSCM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
