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 Descriptor
DTC C056E 4B
- ECU Software Performance Calibration Not Learned

Circuit/System Description

After either replacing the power steering control module (PSCM), motor or steering column assembly, the Steering Wheel Angle and Torque Calibration procedure must be performed.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

This DTC will set if the PSCM, motor or torque sensor has not been calibrated using the Steering Wheel Angle and Torque Calibration procedure.

Actions Taken When DTC Sets

* DTC C056E 4B 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 after the PSCM, motor or torque sensor has been calibrated using the Steering Wheel Angle and Torque Calibration procedure.
* A history DTC will clear after 100 consecutive malfunction-free ignition cycles from when the PSCM, motor or torque sensor has been calibrated using the Steering Wheel Angle and Torque Calibration procedure.

Reference Information
Schematic Reference

Power Steering Schematics (Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Power Steering System Description and Operation (Turbo) (Description and Operation)Power Steering System Description and Operation (Non-Turbo) (Description and Operation)
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

Programming and Relearning (Programming and Relearning) for scan tool information

Circuit/System Verification

Verify DTC C056E 4B is not set.

If DTC is set, perform the steering wheel angle and torque calibration procedure. If the DTC resets, replace the PSCM.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

Programming and Relearning (Programming and Relearning) for PSCM replacement, setup, and programming