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Home >> Buick >> 2016 >> Envision >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Object Detection System And Pedestrian Protection System >> Diagnostic Information and Procedures >> Lane Departure Warning System Malfunction >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. Verify that DTC B356A is not set.
    • If the DTC is not set 
  3. Verify that DTC B0987 is not set.
    • If the DTC is not set 
  4. Verify the scan tool Frontview Camera System Status parameter is Normal.
    • If the parameter is Undefined or Malfunction 

      Refer to Diagnostic Aids.

    • If the parameter is Normal 
  5. Verify the scan tool Lane Departure Warning Switch Status parameter changes between Active and Inactive when pressing the lane departure warning switch.
    • If the parameter does not change between Active and Inactive 

      Refer to Circuit/System Testing - Lane Departure Warning Switch Malfunction.

    • If the parameter changes between Active and Inactive 
  6. Verify the scan tool Lane Departure Warning Indicator turns ON and OFF when commanding the Lane Departure Warning Indicator On and Off with a scan tool.
    • If the indicator does not turn on and off 

      Refer to Circuit/System Testing - Lane Departure Warning Switch Indicator Malfunction.

    • If the indicator turns on and off 
  7. All OK.
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