Diagnostic Instructions
DTC Descriptors
DTC C056E 4B: ECU Software Performance Calibration Not Learned
DTC C056E 42: ECU Hardware Performance Calibration Data Set Not Programmed
Circuit/System Description
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.
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
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.
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. |
| • | 42-Steering assist is set to a default level. |
Conditions for Clearing the 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. |
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
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
C056E 4B
Verify DTC C056E 4B is not set.
| ⇒ | If DTC is set, perform the steering wheel angle and torque calibration procedure. If DTC resets, replace the PSCM. |
C056E 42
Verify DTC C056E 42 is not set.
| ⇒ | 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, setup, and programming
