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Test 35A - Auto Door Lock Problem

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION  . For appropriate wiring diagram, see WIRING DIAGRAMS  at end of article.
  1. If vehicle is equipped with Remote Keyless Entry (RKE), go to TEST 36A. If vehicle is not equipped with RKE, close all doors. Open driver's window and remove ignition key. Using DRB-II, actuate door UNLOCK test and then actuate door LOCK test. If any door locks, repair inoperative door lock motor(s) or wiring.
    NOTE: The BCM must be connected while performing step 2). Failure to do so may lead to incorrect circuit/system diagnosis.
  2. If doors do not lock, check if a door unlock problem exists. If an unlock problem exists, go to TEST 35B. If an unlock problem does not exist, access Body Controller Module (BCM). Module is located behind right kick panel. With DRB-II in voltmeter mode, backprobe BCM Gray connector terminal No. 18, door lock relay control circuit (Orange/White wire). If voltage is less than 10 volts, replace BCM. Perform VERIFICATION PROCEDURE VER-1.
  3. If voltage is more than 10 volts, use DRB-II to stop door lock test. Press driver's side power door lock switch to the lock and then unlock position. If any door locks and unlocks, repair inoperative door lock motor(s) or wiring.
  4. If doors do not lock and unlock, turn ignition off. Disconnect BCM Bone connector. With DRB-II in voltmeter mode, check voltage on BCM Bone connector terminal No. 9, power door lock switch circuit (Orange/Violet wire). Depress power door lock switch. If voltage is less than 10 volts, go to TEST 35C.
  5. If voltage is more than 10 volts, reconnect BCM connector and turn ignition on. Remove door lock relay from fuse/junction block. Fuse/junction block is located behind end cover, on left side of instrument panel. Using DRB-II, actuate door locks. With DRB-II in voltmeter mode, check voltage on door lock relay control circuit (Orange/White wire) on door lock relay connector. If voltage is less than 10 volts, repair open circuit in Orange/White wire between door lock relay and BCM. Perform VERIFICATION PROCEDURE VER-1.
  6. If voltage is more than 10 volts, use DRB-II in voltmeter mode to check voltage on door lock relay connector door lock circuit (Orange/Black wire). Using DRB-II, actuate door unlock test. If voltage is more than 10 volts, repair open circuit in Orange/Black wire. Perform VERIFICATION PROCEDURE VER-1.
  7. If voltage is less than 10 volts, use DRB-II to stop door unlock test. Using DRB-II, check voltage on door lock relay connector fused battery feed circuit (Red wire). If voltage is less than 10 volts, repair open circuit in Red wire. Perform VERIFICATION PROCEDURE VER-1.
  8. If voltage is more than 10 volts, use DRB-II in ohmmeter mode to check resistance on door lock relay connector ground circuit (Black wire). If resistance is more than 5 ohms, repair open circuit in Black wire. Perform VERIFICATION PROCEDURE VER-1. If resistance is less than 5 ohms, replace door lock relay. Perform VERIFICATION PROCEDURE VER-1.
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