C0475

DTC C0475

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 provides an overview of each diagnostic category.

DTC Descriptor

DTC C0475
- Electric Steering Motor Circuit

For symptom byte information, refer to Symptom Byte List Symptom Byte List.

Circuit/System Description

C0475 00

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

C0475 59

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

C0475 59

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

Action Taken When the DTC Sets

* The DTC is stored in memory.

* The driver information center displays a message and/or a warning indicator will be displayed on the instrument cluster.

* No steering assist.

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 Fuel Pump and Level Sensor Assembly

Description and Operation

Power Steering System Description and Operation 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

Control Module References Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON

2. Verify with a scan tool that DTC C0475 57 is not set.

• If the DTC is set
Replace the steering column.

• If the DTC is not set

3. All OK.

Circuit/System Testing

Note: Please perform the Circuit/System Verification before performing the Circuit/System Testing.

1. Ignition OFF and all vehicle systems OFF. It may take up to 2 min for all vehicle systems to power down.

2. Disconnect the harness connector X2 at the K43 Power Steering Control Module.

3. Test for less than 5 ohms between the ground circuit terminal B and ground.

• If 5 ohms or greater

1. Ignition OFF, disconnect the harness connector X2 at the K43 Power Steering Control Module.

2. Test for less than 2 ohms in the ground circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms , repair the open/high resistance in the ground connection.

• If less than 5 ohms

4. Ignition ON.

5. Verify a test lamp illuminates between the B+ circuit terminal A and ground.

• If the test lamp does not illuminate and the circuit fuse is good

1. Ignition OFF.

2. Test for less than 2 ohms in the B+ circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms, verify the fuse is OK and there is voltage at the fuse.

• If the test lamp does not illuminate and the circuit fuse is open

1. Ignition OFF.

2. Test for infinite resistance between the B+ circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.

• If infinite resistance, replace the steering column.

• If the test lamp illuminates

6. Replace the steering column.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Steering Column Replacement Steering Column Replacement

* Control Module References Control Module References for power steering control module replacement, programming and setup.