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Test 20A - Diagnosing Auto Door Locks

  1. Using DRB-II, read auto door locks status. If DRB-II does not display AUTO DOOR LOCKS ARE ENABLED, use DRB-II to enable auto door locks and retest system. If DRB-II displays AUTO DOOR LOCKS ARE ENABLED, use DRB-II to actuate auto door locks.
  2. If doors do not lock, go to TEST 19A. If doors lock, ensure left front door is closed. Read door ajar switch status. If DRB-II does not display LFDOOR AJAR:OPEN, go to TEST 40A.
  3. If DRB-II displays LFDOOR AJAR:OPEN, ensure right front door is closed. Read door ajar switch status. If DRB-II does not display RFDOOR AJAR:OPEN, go to TEST 41A.
  4. If DRB-II displays RFDOOR AJAR:OPEN, ensure side door is closed. Read door ajar switch status. If DRB-II does not display SIDE DR AJR:OPEN, go to TEST 42A.
  5. If DRB-II displays SIDE DR AJR:OPEN, ensure liftgate is closed. Read door ajar switch status. If DRB-II does not display GATE AJAR:OPEN, go to TEST 43A.
  6. If DRB-II displays GATE AJAR:OPEN, read body controller monitors. If TPS percentage does not increase as throttle is opened, see appropriate G - TESTS W/ CODES article in the ENGINE PERFORMANCE Section to diagnose TPS faults. If TPS percentage increases as throttle is opened, raise and support vehicle.
  7. Start engine and shift vehicle into Drive (1st gear on manual transmission). Using DRB-II, read body controller monitors. If MPH does not increase as throttle is opened, see appropriate G - TESTS W/ CODES article in the ENGINE PERFORMANCE Section to diagnose VSS faults. If MPH increases as throttle is opened, turn ignition off and retest system. Circuit is okay.
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