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Circuit/System Verification

WARNING: This page is about a different car, the 2020 Buick Regal TourX, 2020 Buick Regal, 2019 Buick Regal TourX, and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

Refer to Diagnostic Aids before performing Circuit/System Verification.

  1. Ignition ON.
  2. Verify that no DTCs are set.
    • Go to next step: If the DTC is not set 
  3. Verify the scan tool Frontview Camera Disable History 1 - 4 parameters does not have a current Malfunction. Refer to Control Module References for scan tool information.
    • If the parameter is Malfunction 

      Diagnose the system that set the malfunction.

    • Go to next step: If the parameter is Normal 
  4. Verify the forward collision alert indicators illuminate momentarily when turning ignition OFF and then ON.
    • If the indicators do not illuminate 

      Refer to DTC B0987 .

    • Go to next step: If the indicators illuminate 
  5. Verify the driver information center forward collision alert distance indicator toggles between far, medium, near and off.
    • If the setting does not change 

      Refer to DTC B356A .

    • Go to next step: If the setting changes 
  6. Verify the area of the B174W Frontview Camera - Windshield is not contaminated.
    • If contaminated 

      Clean the windshield

    • Go to next step: If not contaminated 
  7. All OK.
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