C0475

DTC C0475 (with HP5)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.

DTC Descriptors
DTC C0475 00
- Electric Steering Motor Circuit

DTC C0475 59
- Electric Steering Motor Circuit/Component Protection Time-out

Circuit/System Description

C0475 00

The power steering control module (PSCM) continuously monitors the voltage and current levels being commanded to the 3-phase steering motor. The PSCM compares the desired and actual current levels to detect malfunctions in the EPS motor, or the circuits to the motor.

C0475 59

The power steering control module (PSCM) continuously monitors the thermal cycle counter of the steering gear. If the thermal cycle counter exceeds the maximum allowable limit, the steering gear has reached its end of life and must be replaced.

Conditions for Running the DTC

The ignition is ON

Conditions for Setting the DTC

C0475 00

The PSCM detects a short to ground, short to voltage, or an open/high resistance on any of the internal motor circuits.

C0475 59

The PSCM detects the thermal cycle counter has exceeded the maximum allowable limit and the whole EPS steering gear system must be replaced.

Action Taken When the DTC Sets

* The DTC is stored in memory.
* The driver information center (DIC) displays the POWER STEERING warning message.
* No steering assist is provided.

Conditions for Clearing the DTC

C0475 00
* A current DTC will clear on the next malfunction-free ignition cycle.
* A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

C0475 59

This DTC cannot be cleared

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 (without HP5) (Description and Operation)Power Steering System Description and Operation (with HP5) (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Testing

C0475 00
1. Ignition OFF, disconnect the X1 harness connector at the PSCM.
2. Test for less than 1ohm between the ground circuit terminal 1 and ground.

• If greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 and ground.

• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

4. If all circuits test normal, replace the PSCM.

C0475 59

Verify that DTC C0475 59 is not set.

If the DTC is set, replace the steering gear assembly

Repair Instructions

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

Control Module References (Programming and Relearning) for PSCM replacement, setup, and programming