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Home >> Buick >> 2021 >> Envision Preferred, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Driver Assistance Systems >> Diagnostic Information and Procedures >> Side Blind Zone Alert System Malfunction >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON, verify both the P43D Side Object Detection Indicator - Driver and P43P Side Object Detection Indicator - Passenger briefly turn on during the system check and turn off after the check is complete.
    • If both the P43D Side Object Detection Indicator - Driver and P43P Side Object Detection Indicator - Passenger do not turn on or remain on at all times 
    1. Verify the system has not been disabled through vehicle personalization.
      • If the system is disabled through vehicle personalization, turn the system on and discuss with the customer the operation of the side blind zone alert system.
      • Go to next step: If the system is not disabled
    2. Verify there are no DTCs set related to the side blind zone alert system.
      • Go to next step: If no DTCs are set.
    3. Refer to Diagnostic Aids to identify any normal operational limitations that may be related to the customer's concern.
    • If only the P43D Side Object Detection Indicator - Driver does not turn on or remains on at all times 

      Refer to Circuit/System Testing - Test 1

    • If only the P43P Side Object Detection Indicator - Passenger does not turn on or remains on at all times 

      Refer to Circuit/System Testing - Test 2

    • Go to next step: If the P43D Side Object Detection Indicator - Driver and P43P Side Object Detection Indicator - Passenger turn on and off 
  2. A fault is currently not present and may be an intermittent condition. Refer to Diagnostic Aids to identify any normal operational limitations that may be related to the customer's concern.