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Theft Deterrent System Diagnostic System Check

  1. Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). DLC is located below left side of instrument panel, to right of steering column. See Figure . Turn ignition switch to RUN position. If scan tool powers up, go to next step. If scan tool does not power up, go to TEST G: SCAN TOOL DOES NOT POWER UP  under SYSTEM TESTS.
  2. Turn ignition switch to RUN position. Try to establish scan tool communication with Body Control Module (BCM) and Powertrain Control Module (PCM). If communication with BCM and PCM is established, go to next step. If communication with BCM and PCM is not established, go to TEST F: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE  under SYSTEM TESTS.
  3. Attempt to establish communication with all modules. If communication with all modules is established, go to next step. If communication with all modules is not established, go to TEST F: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE  under SYSTEM TESTS.
  4. Select DISPLAY DTC function for BCM and PCM. Record all displayed DTCs and status of displayed DTCs. If any DTCs are displayed, go to next step. If no DTCs are displayed, repair anti-theft system by symptom. See appropriate ANTI-THEFT SYSTEMS article.
  5. If scan tool does not display any DTCs that begin with "U", go to next step. If scan tool displays any DTCs that begin with "U", go to TEST F: SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE  under SYSTEM TESTS.
  6. If scan tool does not display DTC P0601-P0607, P1600, P1621 or P1627, go to next step. If scan tool displays DTC P0601-P0607, P1600, P1621 or P1627. perform appropriate test. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
  7. If scan tool does not display DTC B1000 or B1013, go to next step. If scan tool displays DTCs B1000 or B1013, perform appropriate test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS  .
  8. If scan tool displays DTC P0560 or P0620, perform appropriate test. See appropriate GENERATORS & REGULATORS article STARTING & CHARGING SYSTEMS. If scan tool does not display DTC P0560 or P0620, perform appropriate TEST. See appropriate ANTI-THEFT SYSTEMS article.
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