Workshop Manuals Factory service & repair Vauxhall
Vauxhall Astra J17 · Steering
17 · Steering & suspension

DTC C0475

Make
Vauxhall
Model
Astra J
Section
Diagnostic Information and Procedures › Miscellaneous › DTC C0475
SteeringDTC C0475

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 Descriptors

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 assist motor. The power steering control module compares the desired and actual current levels to detect malfunctions in the internal power steering assist motor circuits.

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 the end of its predetermined lifecycle 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 power steering assist motor circuits.

C0475 59

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

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

C0475 00

1. Ignition 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.
⇒ 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 K43 Power Steering Control Module.

C0475 59

Verify that DTC C0475 59 is not set.

If the DTC is set, replace the steering gear.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•  Power Steering Assist Motor Replacement for power steering control module replacement
•  Control Module References for power steering control module programming and setup

Parts & tools for this job For Vauxhall Astra

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