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Home >> Cadillac >> 2013 >> SRX Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 189 (Power Door Lock System And Release Systems) >> Diagnostic Information and Procedures >> DTC B153F: Liftgate Object Sensor Malfunction >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2015 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify the scan tool Liftgate Secondary Obstacle Detection parameter is between 3V-3.5V.
    • If not between 3V-3.5V  

      Refer to Circuit/System Testing.

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

      Test or replace the B71R Liftgate Object Sensor - Right.

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

      Test or replace the B71L Liftgate Object Sensor - Left.

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