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Home >> GMC >> 2013 >> Sierra 1500 XFE >> Repair and Diagnosis >> External Pages >> Different car >> Section 2721 (Object Detection System And Pedestrian Protection System) >> Diagnostic Information and Procedures >> DTC B356A: Vehicle Direction Warning Switch >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition ON.
  2. Verify the scan tool Lane Departure Warning Switch Status parameter changes between Open and Closed when pressing and releasing the lane departure warning switch.
    • If the parameter does not change between Active and Inactive 

      Refer to Circuit/System Testing.

    • If the parameter changes between Active and Inactive 
  3. All OK.
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