GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Captiva Sport 🢒 Driver Information and Entertainment 🢒 Cellular, Entertainment, and Navigation 🢒 DTC C056E

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 C056E 4B: ECU Software Performance Calibration Not Learned

DTC C056E 42:: ECU Hardware Performance Calibration Data Set Not Programmed

Circuit/System Description

DTC C056E 4B

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.

DTC C056E 42

After replacement of the PSCM, the PSCM must be configured with the proper calibration using the service programming system (SPS).

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

DTC C056E 4B

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

DTC C056E 42

This DTC will set if the PSCM has not undergone SPS reprogramming.

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

DTC C056E 4B

    • 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.

DTC C056E 42

    • A current DTC will clear after the PSCM has been configured with the proper calibration profile.
    • A history DTC will clear after 100 consecutive malfunction-free ignition cycles from when the PSCM has been configured with the proper calibration profile.

Reference Information

Schematic Reference

Power Steering Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Power Steering System Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

DTC C056E 4B

  1. Verify DTC  C056E 4B is not set.
    2. ⇒If DTC is set, perform the steering wheel angle and torque calibration procedure. If DTC resets, replace the PSCM.

DTC C056E 42

  1. Verify DTC  C056E 42 is not set.
    2. ⇒If DTC is set, program the PSCM. If DTC resets, replace the PSCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for PSCM replacement and programming.