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Test 141A - Testing System Function

NOTE: Perform a visual inspection before proceeding with this test.
  1. Connect scan tool to data link connector, located at right of steering column. See Fig 1. Select THEFT ALARM. If scan tool screen is blank or displays a bus failure message, see BODY CONTROL COMPUTER article. If scan tool displays NO RESPONSE, go to TEST 142A . If scan tool displays MONITOR DISPLAY, go to next step.
  2. Using scan tool, select THEFT ALARM, and then MONITOR DISPLAY. Read Vehicle Theft Security System (VTSS) status. If VTSS status is not DISARMED, go to TEST 141B . If VTSS status is DISARMED, go to next step.
  3. Using scan tool, select BODY and then BODY CONTROLLER. Read Diagnostic Trouble Code (DTC). If BATTERY POWER TO MODULE DTC is displayed, see BODY CONTROL COMPUTER article. If scan tool does not display BATTERY POWER TO MODULE DTC, go to next step.
  4. Using scan tool, select THEFT ALARM, MISCELLANEOUS, CHANGE MODE and then DIAGNOSTICS to put theft alarm in diagnostics mode. If scan tool does not display TURN IGNITION KEY TO OFF, go to TEST 143A . If scan tool displays TURN IGNITION KEY TO OFF, go to next step.
    NOTE: When theft alarm enters into diagnostics mode, horn should sound 2 times, and VTSS indicator light and headlights should flash.
  5. Remove key from ignition switch. Open and close each door, depress power door lock switch to LOCK and UNLOCK positions, and rotate key in left and right front doors to UNLOCK position. If horn does not sound after each action, go to appropriate test. See VTSS SYSTEM TESTING .
    VTSS SYSTEM TESTING

    Failed Component TEST No.
    Left Front Door 147A
    Right Front Door 148A
    Right Rear Door 149A
    Left Rear Door 150A
    Power Door Lock Switch Lock Position 151A
    Power Door Lock Switch Unlock Position 152A
    Left Front Door Key Cylinder 153A
    Right Front Door Key Cylinder 154A
  6. Turn ignition switch to ON position. If horn sounds, go to next step. If horn does not sound, perform TEST 143A .
  7. Using scan tool, select THEFT ALARM and then MONITOR DISPLAY. Read VTSS status. If VTSS status is disarmed, system is okay. If VTSS status is other than DISARMED, perform VTSS TEST 141B .
  8. If PCM is 1 NO RESPONSE/2 NO RESPONSE, perform TEST 155A. If PCM is 1 NOT OK TO ARM VTSS/2 OK TO RUN ENGINE, replace Powertrain Control Module (PCM). If there is a problem with Remote Keyless Entry (RKE), perform TEST 156A .
Fig 1: Locating Data Link Connector
G93C28409
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