Buick Regal: DTC C0475

Diagnostic Instructions

• Perform the Diagnostic System Check prior to using this diagnostic procedure:Diagnostic System Check - Vehicle
• Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis
• An overview of each diagnostic category can be found here:Diagnostic Procedure Instructions

DTC Descriptor

DTC C0475

Power Steering Motor Circuit

Symptom Byte Information: Symptom Byte List.

Circuit/System Description

For an overview of the component/system, refer to:Power Steering System Description and Operation (Electronic Power Steering).

Conditions for Running the DTC

Ignition = On

Conditions for Setting the DTC

Power Steering Motor Circuit = Malfunction

Actions Taken When the DTC Sets

• Power Steering Output Torque = Disabled
• P9 Driver Information Center Display = Service Power Steering

Conditions for Clearing the DTC

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

Reference Information

Schematic Reference

Power Steering Wiring Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEW INDEX

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode.

2. Verify DTC C0475 is not set.

• If the DTC is set

1. Clear DTCs - DTC C0475
2. Cycle the ignition from OFF to ON.
3. Verify the DTC does not set.
   • If the DTC sets - Replace the component: Steering Gear
   • Go to next step: If the DTC does not set

• Go to next step: If the DTC is not set

3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification

Electric Dual Pinion Rack and Pinion Steering Gear Replacement

For control module replacement, programming, and setup refer to: Control Module References.

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