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Home >> GMC >> 2016 >> Yukon SLE, 4WD, Gas >> Repair and Diagnosis >> External Pages >> Different car >> Section 91 (Object Detection System And Pedestrian Protection System) >> Diagnostic Information and Procedures >> Forward Collision Alert System Malfunction (except Cadillac with UGN) >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2015 GMC Yukon XL, 2015 GMC Yukon, 2015 Chevrolet Tahoe, 2015 Chevrolet Suburban, and 2015 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify the scan tool Forward Collision Alert Function Status parameter is not Malfunction.
    • If the parameter is Malfunction 

      Refer to Circuit/System Testing - Frontview Camera Module Malfunction

    • If parameter is not Malfunction 
  3. Verify the forward collision alert indicators turn on and off when commanding the instrument cluster All Indicators On and Off with a scan tool.
    • If the indicators do not illuminate 

      Refer to Circuit/System Testing - Forward Collision Alert Indicator Malfunction

    • If the indicators illuminate 
  4. Verify the forward collision alert distance on the driver information center toggles between far, medium, near and off when cycling the forward collision alert distance switch.
    • If the setting does not change 

      Test or replace the S70L Steering Wheel Controls Switch - Left.

    • If the setting changes 
  5. Verify the area of the B174W Frontview Camera - Windshield is not contaminated.
    • If contaminated 

      Clean the windshield

    • If not contaminated 
  6. All OK.
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