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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 246 (Power Door Lock System And Release Systems - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Power Door Locks Malfunction (Coupe Without UTT) >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

Door Lock Switch

  1. Ignition OFF, disconnect the harness connector at the appropriate S13 Door Lock Switch.
  2. Test for infinite resistance between the signal terminal 2 and the ground terminal 4 with the switch in the open position.
    • If less than infinite resistance 

      Replace the S13 Door Lock Switch.

    • If infinite resistance 
  3. Test for infinite resistance between the signal terminal 3 and the ground terminal 4 with the switch in the open position.
    • If less than infinite resistance 

      Replace the S13 Door Lock Switch.

    • If infinite resistance 
  4. Test for less than 2 Ω between the signal terminal 2 and the ground terminal 4 with the switch in the Lock position.
    • If 2 Ω or greater 

      Replace the S13 Door Lock Switch.

    • If less than 2 Ω 
  5. Test for less than 2 Ω between the signal terminal 3 and the ground terminal 4 with the switch in the Unlock position.
    • If 2 Ω or greater 

      Replace the S13 Door Lock Switch.

    • If less than 2 Ω 
  6. All OK

Door Latch Assembly

  1. Ignition OFF, disconnect the harness connector at the appropriate A23 Door Latch Assembly.
  2. Install a 25 A fused jumper wire between one of the control terminals and 12 V. Momentarily install a jumper wire between the other control terminal and ground. Reverse the jumper wires at least two times, the A23 Door Latch Assembly should perform the LOCK and UNLOCK function.
    • If the actuator does not perform the LOCK and UNLOCK function 

      Replace the A23 Door Latch Assembly.

    • If the actuator performs the LOCK and UNLOCK function 
  3. All OK