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 Descriptors
DTC C056E 42: ECU Hardware Performance Calibration Data Set Not ProgrammedDTC C056E 4B: ECU Software Performance Calibration Not Learned
Circuit/System Description
After replacement of the power steering control module (PSCM), the PSCM must be configured with the proper tuning profile using the service programming system (SPS).
After replacement of the PSCM, power steering motor, or steering gear, the steering position/torque sensor calibration procedure must be performed.
Conditions for Running the DTC
Ignition ON.
Conditions for Setting the DTC
C056E 42
This DTC will set if the PSCM has not undergone SPS programming.
C056E 4B
This DTC will set if the PSCM, motor or torque sensor has not been calibrated using the steering position / torque sensor calibration procedure.
Actions Taken When DTC Sets
| • | DTC is stored in memory. |
| • | The driver information center (DIC) displays the SERVICE POWER STEERING warning message. |
| • | Steering assist is set to a default level. |
Conditions for Clearing the DTC
C056E 42
A current or history DTC will clear after the PSCM has been configured with the proper tuning profile.
C056E 4B
A current or history DTC will clear after the steering position/torque sensor calibration procedure has been performed.
Reference Information
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 C056E 42 is not set.
- Verify DTC C056E 4B is not set.
| ⇒ | If DTC C056E 42 is set, perform the PSCM programming and setup procedures. If DTC C056E 42 resets, replace the PSCM. |
| ⇒ | If DTC C056E 4B is set, perform the steering position/torque sensor calibration. If DTC C056E 4B 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
