Chrysler Town and Country 2003 Owner's Manual page 992

VEHICLE THEFT/SECURITY
*VTSS SIREN INOP (EXPORT ONLY) —
TEST
4 With the VTSS Siren connector disconnected.
Turn the ignition on.
Measure the voltage of the Siren Signal Control circuit (cavity 2) in the VTSS Siren
connector.
Is the voltage approximately 5.0 volts +/- 1.0 volt?
Yes → Replace the VTSS Siren.
→ Go To 5
No
5 Gain access to the Thatcham Alarm Module 16-way harness connector.
While back probing, measure the voltage of the Siren Signal Control circuit.
Turn the ignition on.
Is the voltage approximately 5.0 volts?
Yes → Go To 6
→ Replace the RKE/Thatcham Alarm Module.
No
6 Disconnect the Thatcham Alarm Module 16-way harness connector.
Measure the resistance of the Siren Signal Control circuit between the Thatcham
Alarm Module and the VTSS Siren connectors.
Is the resistance below 5.0 ohms?
Yes → Replace the VTSS Siren.
→ Repair the Siren Signal Control circuit for an open.
No
7 Gain access to the RKE/Thatcham Alarm Module.
While back probing, measure the resistance of the Siren Signal Return circuit in the
Thatcham Alarm Module 16-way connector.
Is the resistance below 5.0 ohms?
Yes → Go To 8
→ Replace the RKE/Thatcham Alarm Module.
No
8 Disconnect the Thatcham Alarm Module 16-way harness connector.
Measure the resistance of the Siren Signal Return circuit between the Thatcham
Alarm Module and the VTSS Siren connector.
Is the resistance below 5.0 ohms?
Yes → Replace the VTSS Siren.
→ Repair the Siren Signal Return circuit for an open.
No
9 Gain access to the RKE/Thatcham Alarm Module.
While back probing, measure the voltage of the Siren Supply circuit in the Thatcham
Alarm Module 16-way connector.
Turn the ignition on.
Is the voltage above 10.0 volts?
Yes → Go To 10
→ Replace the RKE/Thatcham Alarm Module.
No
ACTION
Perform VTSS VERIFICATION TEST - 1A.
Perform VTSS VERIFICATION TEST - 1A.
Perform VTSS VERIFICATION TEST - 1A.
Perform VTSS VERIFICATION TEST - 1A.
Perform VTSS VERIFICATION TEST - 1A.
Perform VTSS VERIFICATION TEST - 1A.
Perform VTSS VERIFICATION TEST - 1A.
Perform VTSS VERIFICATION TEST - 1A.
Continued
968
APPLICABILITY
All
All
All
All
All
All