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
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1. Lane Departure Warning Indicator Malfunction
Circuit/System Description
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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.
READ NEXT:
Forward Range Radar Module Inspection
Inspection Procedure
1.
CONTROL MODULE DTC CHECK - Using a scan tool, perform the Vehicle DTC
Information function - Verify there are no current control module DTCs set. If
any DTC is set, refer to
Front View Camera Module Learn
Calibration (without UGN)
NOTE: Do NOT swap cameras between vehicles, it is not approved and a
VIN
mismatch will occur.
The calibration process for the front view camera system is necessary when a
f
SEE MORE:
Knuckle Replacement (FWD)
Removal Procedure
1. Remove the rear tire and wheel assembly.
2. Rear Brake Caliper Bracket - Remove.
3. Rear Brake Rotor - Remove.
4. Rear Brake Shield - Remove.
5. Rear Wheel Bearing and Hub Assembly - Remove.
6.
Rear Suspension Upper Control Arm Outer Nut(1) - Remove.
7. Rear Suspension Up
Interior Lighting
Instrument Panel Illumination
Control
The brightness of the instrument
cluster display, infotainment display
and controls, steering wheel
controls, and all other illuminated
controls, as well as feature status
indicators can be adjusted.
The knob for this feature is on the
instrument panel beside
