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Home >> GMC >> 2017 >> Acadia SL >> Repair and Diagnosis (Single Page) >> External Pages >> Different car >> Section 1 (Object Detection System And Pedestrian Protection System) >> Diagnostic Information and Procedures >> Lane Departure Warning System Malfunction >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2016 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
  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 ON and OFF when pressing the lane departure warning switch.
    • If the parameter does not change between On and Off 

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

    • If the parameter changes between On and Off 
  6. Verify the scan tool Lane Departure Warning Indicator Status parameter changes change between On and Off when pressing the lane departure warning switch.
    • If the parameter does not change between On and Off 

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

    • If the parameter changes between On and Off 
  7. All OK.