VTSS Will Not Arm

WARNING: This page is about a different car, the 2002 Dodge Intrepid, 2002 Chrysler Intrepid, 2002 Chrysler Concorde, and 2002 Chrysler 300M. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: After making any repairs, perform VEHICLE THEFT SECURITY SYSTEM VERIFICATION TEST under VERIFICATION TESTS.

Possible Causes:

Check The VTSS Status
Check The BCM For DTC's
Body Control Module - No Alarm Output

Testing

Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, read THEFT ALARM status. If scan tool displays ENABLED, go to next step. If scan tool does not display ENABLED, enable Vehicle Theft Security System (VTSS).
Using scan tool, retrieve Body Control Module (BCM) DTCs. If any DTCs exist, perform appropriate test. See DIAGNOSTIC TROUBLE CODE IDENTIFICATION table under SELF-DIAGNOSTIC SYSTEM. If no DTCs exist, replace BCM. See BODY CONTROL MODULE under REMOVAL & INSTALLATION.