Power Steering

DTC C056E

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provide an overview of each diagnostic category.

DTC Descriptors

DTC C056E 42

-
ECU Hardware Performance Calibration Data Set Not Programmed

DTC 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

Component Connector End Views 1-2 Shift Solenoid (SS) Valve (M30)

Description and Operation

Power Steering System Description and Operation (EPS) Power Steering System (EPS)Power Steering System Description and Operation (Hydraulic Power Steering) Power Steering System (Hydraulic Power Steering)

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

1. Verify DTC C056E 42 is not set.

• If DTC C056E 42 is set, perform the PSCM programming and setup procedures. If DTC C056E 42 resets, replace the PSCM.

2. Verify DTC C056E 4B is not set.

• 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 Verification Tests after completing the diagnostic procedure.

Control Module References Control Module References for PSCM replacement, setup, and programming