DTC C056D without HP5
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
Description and Operation
Power Steering System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Verify DTC C056D 39 is not set.
| ⇒ | If the DTC is set, clear the DTC. Verify the DTC does not reset. If the DTC resets, replace the PSCM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for PSCM replacement, setup, and programming
DTC C056D with HP5
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 34: ECU Hardware Performance RAM FailureDTC C056D 35: ECU Hardware Performance ROM Failure
DTC C056D 36: ECU Hardware Performance EEPROM Failure
DTC C056D 37: ECU Hardware Performance Watchdog / Safety [micro ]C Failure
DTC C056D 39: ECU Hardware Performance Internal Electronic Failure
Circuit/System Description
The power steering control module (PSCM) continuously monitors the internal hardware within the module.
Conditions for Running the DTC
Ignition ON.
Conditions for Setting the DTC
The PSCM detects an internal hardware malfunction within the module.
Action Taken When the DTC Sets
| • | No Steering assist. |
| • | The driver information center (DIC) displays the SERVICE POWER STEERING warning message. |
| • | DTC is stored in memory. |
Conditions for Clearing the DTC
| • | A current DTC will clear on the next malfunction free ignition cycle. |
| • | A history DTC will clear after 40 consecutive malfunction free ignition cycles. |
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Power Steering System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
- Verify that DTC C056D is not set.
| ⇒ | If the DTC is set, replace the PSCM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for PSCM replacement, setup, and programming
