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Test 1A - Testing System Function

NOTE: For connector terminal identification, refer to CONNECTOR IDENTIFICATION  . For appropriate wiring diagram, see appropriate chassis wiring diagram in the WIRING DIAGRAMS article.
  1. Connect DRB-II to data link connector. See Figure . If DRB-II displays SELECT SYSTEM, select VTA MODULE. If DRB-II is blank or displays anything other than SELECT SYSTEM, see BODY CONTROL COMPUTER - VEHICLE COMMUNICATIONS article in the ENGINE PERFORMANCE section.
  2. If after selecting VTA MODULE the DRB-II displays NO RESPONSE, go to TEST 2A. If after selecting VTA MODULE the DRB-II screen does not display NO RESPONSE, disconnect the illuminated entry module. See Fig 1 . Ensure all doors, hood and liftgate are fully closed.
    Fig 1: Identifying Relay Center Location
    G93F75882
  3. If security light flashes constantly, go to TEST 3A  . If security light does not flash, switch VTA status to diagnostic using DRB-II. If DRB-II does not display TURN IGNITION KEY TO ACC. POSITION, go to TEST 4A  . If DRB-II displays TURN IGNITION KEY TO ACC. POSITION, turn ignition switch to ACC. position.
  4. If DRB-II displays NO RESPONSE after turning key to ACC. position, go to TEST 5A  . If after turning key to ACC. position horn does not sound, go to TEST 6A  . If horn does sound, check if security light is flashing. If security light is flashing, check if park and headlights are flashing.
  5. Go to TEST 7A  if security light is not flashing. Go to TEST 8A  if exterior lights are not flashing. If exterior lights are flashing, turn ignition off and open left front door. Close door. If horn does not sound, go to TEST 9A  .
  6. If horn does sound, open right front door. Close door. If horn does not sound, go to TEST 9A  . If horn does sound, open right rear door. Close door. If horn does not sound, go to TEST 9A  . If horn does sound, open left rear door. Close door. If horn does not sound, go to TEST 9A  .
  7. If horn does sound, open hood. Close hood. If horn does not sound, go to TEST 10A  . If horn does sound, open liftgate. Close liftgate. If horn does not sound, go to TEST 11A  . If horn does sound, push power door lock switch to LOCK position.
  8. If horn does not sound, go to TEST 12A  . If horn does sound, push power door lock switch to UNLOCK position. If horn does not sound, go to TEST 13A  . If horn does sound, rotate key in left front door lock to UNLOCK position. If horn does not sound, proceed to TEST 14A  .
  9. If horn does sound, rotate key in right front door lock to UNLOCK position. If horn does not sound, go to TEST 15A  . If horn does sound, rotate key in liftgate to UNLOCK position. If horn does not sound, go to TEST 16A  .
  10. If horn does sound, turn ignition on. If horn does not sound, go to TEST 4A  . If horn does sound, read vehicle theft alarm status with DRB-II. If the DRB-II does not display CURRENT MODE DISARMED, go to TEST 1B  . If DRB-II does display CURRENT MODE DISARMED, DRB-II screen should display ENGINE CONTROLLER: 1) NO RESPONSE, 2) NO RESPONSE ?. If message is displayed, go to TEST 17A  .
  11. If DRB-II displays the message, ENGINE CONTROLLER: 1) OK TO RUN ARM VTA, 2) OK TO RUN ENGINE ?, go to TEST 18A  if malfunction is caused by keyless entry, arm or disarm. If message is not displayed, replace Powertrain Control Module (PCM).
  12. If keyless entry is working properly, determine if engine controller has been replaced. If engine controller has not been replaced, system is functioning properly. Engine has to cycle through 20 ignition starts before VTA becomes operational (assembly plant alarm override feature).
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