LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Buick >> 2016 >> Encore Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 56 (Object Detection System And Pedestrian Protection System) >> Diagnostic Information and Procedures >> Side Object System Malfunction >> Circuit/System Verification
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit/System Verification

WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify the scan tool can communicate with the B218L Side Object Sensor Module - Left.
    • If the scan tool cannot communicate with the B218R Side Object Sensor Module - Right 

      Refer to Circuit/System Testing - Left Side Object Sensor Malfunction.

    • If the scan tool can communicate with the B218L Side Object Sensor Module - Left 
  3. Verify DTC U18A6 is not present
    • If DTC U18A6 is not present 
  4. Ignition OFF, ignition ON.
  5. Verify that both side blind zone alert system indicators located in the outside rearview mirrors briefly turn ON and then turn OFF during the system self test.
    • If both side blind zone alert indicators do not briefly turn ON and OFF 
    1. Verify the system is enabled
      • If disabled, refer to Diagnostic Aids for cause of disable.
      • If enabled, refer to Circuit/System Testing - Side Object Indicator Malfunction.
    • If only one indicator does not briefly illuminate during the self test 

      Refer to Circuit/System Testing - Side Object Indicator Malfunction.

    • If both side blind zone alert indicators briefly turn ON and OFF 
  6. All OK.
scientia non olet · About LEMON Manuals