Buick Regal: Lane Keep Assist System Malfunction

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

Diagnostic Fault Information

1. Lane Departure Warning Indicator Malfunction

Circuit/System Description

Diagnostic Aids

Refer to: Scan Tool Information - Frontview Camera Disable History 1-4.

For more information see: Forward Collision Alert Description and Operation.

For more information see: Lane Keep Assist Description and Operation.

This procedure is required when the following component has been repaired, replaced, removed, or serviced: B174W Frontview Camera - Windshield - Perform the following action: Front View Camera Module Learn.

Reference Information

Schematic Reference

Driver Assistance Systems Wiring Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Lane Departure Warning Description and Operation

Lane Keep Assist Description and Operation

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 that no DTCs are set.

• If any DTC is set

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

• Go to next step: If no DTC is set

3. Verify the component turns On and Off: Lane Departure Warning Indicator

- Lane Departure Warning Switch

• If the component does not turn On and Off

Refer to: DTC B0987

• Go to next step: If the component turns On and Off

4. All OK.

Repair Instructions

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

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

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