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Circuit/System Verification

WARNING: This page is about a different car, the 2017 GMC Acadia Limited, 2017 Chevrolet Traverse, and 2017 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, observe the scan tool Liftgate Object Sensor Supply Status parameter. The reading should be between 3 - 3.5 V.
    • If not within the specified range, perform the Circuit/System Testing.
  2. Verify the scan tool Liftgate Object Sensor Supply Status parameter is between 3V-3.5V and changes to 2.25-2.75V as the B71R Liftgate Object Sensor - Right is pressed.
    • If the value does not change, test or replace the B71R Liftgate Object Sensor - Right.
  3. Verify the scan tool Liftgate Object Sensor Supply Status parameter is between 3V-3.5V and changes to 2.25-2.75V as the B71L Liftgate Object Sensor - Left is pressed.
    • If the value does not change, test or replace the B71L Liftgate Object Sensor - Left.
  4. Command the liftgate to power close by pressing the B70 liftgate close switch and as the liftgate is closing, press the B71R Liftgate Object Sensor - Right or the B71L Liftgate Object Sensor - Left. The liftgate should stop and power open.
    • If the liftgate continues to power close, replace the K39 Liftgate Control Module.
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