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Home >> Buick >> 2017 >> Envision Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Power Door Lock System And Release Systems >> Diagnostic Information and Procedures >> DTC B153F: Liftgate Object Sensor Malfunction >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. Verify the scan tool Liftgate Secondary Obstacle Detection parameter is between 3-3.5 V.
    • If not between 3-3.5 V 

      Refer to Circuit/System Testing.

    • If between 3-3.5 V 
  3. Verify the scan tool Liftgate Secondary Obstacle Detection parameter is between 3-3.5 V and changes to 2.25-2.75 V as the B71R Liftgate Object Sensor - Right is pressed.
    • If not between 2.25-2.75 V or does not change 

      Test or replace the B71R Liftgate Object Sensor - Right.

    • If between 2.25-2.75 V and changes 
  4. Verify the scan tool Liftgate Secondary Obstacle Detection parameter is between 3-3.5 V and changes to 2.25-2.75 V as the B71L Liftgate Object Sensor - Left is pressed.
    • If not between 2.25-2.75 V or does not change 

      Test or replace the B71L Liftgate Object Sensor - Left.

    • If between 2.25-2.75 V and changes 
  5. All OK.
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