Symptom:
*ALARM TRIPS ON ITS OWN
POSSIBLE CAUSES
DRB DISPLAY LAST VTSS CAUSE
INTERMITTENT CONDITION
TEST ACTION APPLICABILITY
1 With the DRBIIIt in Inputs/Outputs, read the Last VTSS Cause state.
Were there any causes displayed?
All
Yes → Check for a possible intermittent condition with the circuit
indicated by the DRBIIIt.
Perform VTSS VERIFICATION TEST - 1A.
No → The condition that caused this symptom is currently not present.
Inspect the related wiring harness for a possible intermittent
condition. Look for any chafed, pierced, pinched or partially
broken wires.
Perform VTSS VERIFICATION TEST - 1A.
521
VEHICLE THEFT/SECURITY