Theft Deterrent System Inoperative

NOTE: Use this test when UTD system will not Arm or Disarm properly.

Perform UNIVERSAL THEFT DETERRENT (UTD) SYSTEM CHECK . Turn ignition off. Open driver or passenger door. Lock doors using power lock switch. Close doors. System should be armed. If system arms, go to next step. If system does not arm, go to step 5).
Disarm system, using key to unlock driver or passenger door lock. If system does not disarm, go to next step. If system disarms, go to step 6).
Disarm system, using UNLOCK button on remote transmitter or by walking into range (with passive switch on). If system does not disarm, go to next step. If system disarms, see KEYLESS ENTRY SYSTEM article.
Using scan tool, check communications with BCM, LDCM, RDCM and RFA modules. If scan tool can communicate with all modules, go to step 7). If scan tool is unable to communicate with module(s), see appropriate article for diagnosis and repair. After repair, turn ignition off. Reconnect all components and connectors. Turn ignition on. If repair is complete, system is okay.
Turn ignition off. Close doors. Press LOCK button on remote transmitter or walk out of range (with passive switch on). If system arms properly, see KEYLESS ENTRY SYSTEM article. If system does not Arm, go to step 4).
Check following circuits for intermittent problems. Door ajar switches, door lock cylinder switches, power door lock switches, hood ajar switch (export only) and communications between BCM, RDCM, LDCM and PCM. If no problems are found, system is okay. If a problem is found, repair as necessary. Turn ignition off. Reconnect all components and connectors. Turn ignition on. If repair is complete, go to UNIVERSAL THEFT DETERRENT (UTD) SYSTEM CHECK .
Replace BCM. Program new BCM. See PROGRAMMING .