Buick Regal: DTC C0460

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 C0460

Steering Wheel Angle Sensor

Symptom Byte Information: Symptom Byte List.

Circuit/System Description

For an overview of the component/system, refer to:ABS Description and Operation.

Conditions for Running the DTC

• K17 Electronic Brake Control Module = During control module power up
• Ignition Voltage = Greater than 8 V
• Vehicle Speed = Greater than 20 km/h (12 MPH)

Conditions for Setting the DTC

C0460 42

Steering Wheel Angle Sensor = Calibration Not Programmed

C0460 4B

Steering Wheel Angle Sensor = Calibration Not Learned - Zero position not set.

C0460 58

Steering Wheel Angle Sensor = Performance

C0460 5A

Steering Wheel Angle Sensor Signal = Not Plausible

Actions Taken When the DTC Sets

Power Steering Output Torque = Disabled

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

Circuit/System Verification

C0460 42

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

2. Verify DTC C0460 42 is not set.

• If the DTC is set

1. Perform the following action: Rotate the steering wheel - To the full stop position - Left & Right
2. Clear the DTCs.
3. Verify the DTC does not set.
   • If the DTC sets - Replace the component: K43 Power Steering Control Module
   • Go to next step: If the DTC is not set
4. All OK.

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

3. All OK.

C0460 4B

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

2. Verify DTC C0460 4B is not set.

• If the DTC is set

1. Perform the following procedure/test:Power Steering Control Module Calibration
2. Verify the DTC does not set.
   • If the DTC sets - Replace the component: K43 Power Steering Control Module
   • Go to next step: If the DTC is not set
3. All OK.

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

3. All OK.

C0460 58

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

2. Verify DTC C0460 58 is not set.

NOTE: Inspect the electrical connectors and the ground circuits of the component for poor connections.

3.

• If the DTC is set

Replace the component: Steering Gear

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

4. All OK.

C0460 5A

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

2. Verify there are no other DTCs set, except for DTC C0460 5A.

• If any other DTCs are set

Refer to:Diagnostic Trouble Code (DTC) List - Vehicle

• Go to next step: If no other DTCs are set

3. Verify the following conditions do not exist: Front wheel alignment - Incorrect adjustment.

4. Verify the scan tool parameter: Steering Wheel Angle = 0 degrees.

• If not 0º

1. Perform the following procedure/test:Power Steering Control Module Calibration
2. Verify the DTC does not set.
   • If the DTC sets - Replace the component: K43 Power Steering Control Module
   • Go to next step: If the DTC does not set
3. All OK.

• Go to next step: If 0º

5. 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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