Antitheft and Alarm Systems: Testing and Inspection

*ALARM TRIPS ON ITS OWN





For a complete Vehicle Theft Security System Circuit Diagram, Schematics and Diagrams.

Diagnostic Test

1. MONITOR THE VEHICLE THEFT SECURITY SYSTEM WITH THE SCAN TOOL
NOTE: If any vehicle theft DTCs are set, diagnose them first before continuing.

With the scan tool in Inputs/Outputs, read the Central Locking Pump/Security System Module last cause state.
Were there any causes displayed?

Yes

- Check for a possible intermittent condition with the circuit indicated by the scan tool.
- Perform VTSS VERIFICATION TEST. Vehicle Theft Security Verification Tests

No

- The condition that caused the alarm is not present at this time. Search for any Technical Service Bulletins (TSB) that may apply. Visually inspect related wiring harnesses and connectors. Look for damaged wires or connectors.
- Perform VTSS VERIFICATION TEST. Vehicle Theft Security Verification Tests