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Home >> Buick >> 2018 >> Regal Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 53 (Driver Assistance Systems) >> Diagnostic Information and Procedures >> Side Blind Zone Alert System Malfunction >> Circuit/System Verification
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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.
  1. Ignition/Vehicle - Off
  2. Ignition - On/Vehicle - In Service Mode
  3. Verify the component turns On and Off:
    • Side Blind Zone Alert Indicator @ A9A Outside Rearview Mirror - Driver
    • Side Blind Zone Alert Indicator @ A9B Outside Rearview Mirror - Passenger
    • Go to next step: If the component turns On and Off 
  4. Verify that no DTCs are set.
    • Go to next step: If no DTC is set 
  5. Verify the following control modules contain the latest software: B218L Side Object Sensor Module - Left
    • If not the latest software is contained 

      Program the control module: B218L Side Object Sensor Module - Left

    • Go to next step: If the latest software is contained 
  6. All OK.
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