Antitheft and Alarm Systems: Testing and Inspection

*ALARM TRIPS ON ITS OWN





Diagnostic Test

1. MONITOR THE VEHICLE THEFT SECURITY SYSTEM WITH THE DRB III(R)





NOTE: If any vehicle theft DTCs are set, diagnose them first before continuing.

With the DRB III(R) 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 DRB III(R).
- Perform VTSS VERIFICATION TEST. VTSS Verification Test

No

- The condition that caused the alarm is not present at this time. Refer to 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. VTSS Verification Test