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Home >> GMC >> 2019 >> Terrain SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 81 (Driver Assistance Systems) >> Diagnostic Information And Procedures >> DTC B356A: Vehicle Direction Warning Switch Circuit (GMC) >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2018 GMC Terrain and 2018 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition - On/Vehicle - In Service Mode
  2. Operate the component: Lane Departure Warning Switch - Cycle On and Off

    Verify the scan tool parameter: Lane Departure Warning Switch Status = Active/Inactive - The value should change when selecting the different switch positions.

    • If not the specified values 

      Refer to: Circuit/System Testing

    • Go to next step: If the specified values 
  3. All OK.