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:
Crankshaft & Main Bearings
REMOVAL
NOTE: Examples used in this article are general in nature and do not
necessarily
relate to a specific engine or system. Illustrations and procedures have
been chosen to guide mechanic through engine overhaul process.
Descriptions of processes of cleaning, inspection, assembly and machine
s
Brake Pipe Replacement
Special Tools
CH-45405 Pipe Flaring Tool Kit
For equivalent regional tools, refer to Special Tools.
WARNING: Refer to Brake Fluid Irritant Warning.
WARNING: Always use double walled steel brake pipe when replacing brake
pipes. The
use of any other pipe is not recommended and may cause brake system
