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DTC C0475

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 provides an overview of each diagnostic category.

DTC Descriptor

DTC C0475 00: Electric Steering Motor Circuit Malfunction

DTC C0475 59: Electric Steering Motor Circuit Protection Time-Out

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 centre displays the SERVICE POWER STEERING warning message.
    • 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

Connector End View Reference

Component Connector End Views

Description and Operation

Power Steering System Description and Operation : Electronic Power Steering

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

C0475 00

  1. Vehicle OFF, disconnect the X1 harness connector at the K43 power steering control module.
  2. Test for less than 1 Ω between the ground circuit terminal 1 and ground.
    3. ⇒If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Vehicle in Service Mode, verify that a test lamp illuminates between the B+ circuit terminal 2 and earth.
    4. ⇒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 K43 power steering control module.

C0475 59

Verify that DTC C0475 59 is not set.

⇒If the DTC is set, replace the K43 power steering control module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Steering Gear Replacement
    • Control Module References for power steering control module replacement, programming and setup
   


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