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Component Testing

WARNING: This page is about a different car, the 2011 GMC Acadia, 2011 Chevrolet Traverse, and 2011 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.

Liftgate Object Sensor

  1. Ignition OFF, disconnect the harness connectors at the B71 liftgate object sensor.
  2. Test for 8k-12k Ω between the signal terminal A and the low reference terminal B.
    • If not within the specified range, replace the B71 liftgate object sensor.

Interior/Exterior Liftgate Control Switch

  1. Ignition OFF, disconnect the harness connector at the appropriate liftgate control switch.
  2. Test for infinite resistance between the signal terminal 1 and the low reference terminal 2 with the switch in the open position.
    • If not the specified value, replace the liftgate control switch.
  3. Test for less than 2 Ω between the signal terminal 1 and the low reference terminal 2 with the switch in the closed position.
    • If greater than the specified range, replace the liftgate control switch.

Liftgate Latch Assembly

  1. Install a 20A fused jumper wire between the control terminal 1 and 12V. Momentarily install a jumper wire between the control terminal 3 and ground. The liftgate latch assembly should perform the CINCH or RELEASE function.
    • If the function does not perform as specified, replace the liftgate latch assembly.
  2. Reverse the jumper wires, the liftgate latch assembly should perform the RELEASE or CINCH function.
    • If the function does not perform as specified, replace the liftgate latch assembly.

I/P Multifunction Switch Assembly

  1. Ignition OFF, disconnect the harness connector at the I/P multifunction switch.
  2. Test for infinite resistance between the signal terminal 7 and the ground terminal 3 with the liftgate open switch in the inactive position.
    • If not the specified value, replace the I/P multifunction switch.
  3. Test for infinite resistance between the signal terminal 8 and the ground terminal 3 with the liftgate disable switch in the inactive position.
    • If not the specified value, replace the I/P multifunction switch.
  4. Test for less than 3 Ω between the signal terminal 7 and the ground terminal 3 with the liftgate open switch in the active position.
    • If greater than the specified range, replace the I/P multifunction switch.
  5. Test for less than 3 Ω between the signal terminal 8 and the ground terminal 3 with the switch in the disable position.
    • If greater than the specified range, replace the I/P multifunction switch.
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