Intrusion Transceiver Module (Export only)

The Body Control Module (BCM) along with an Intrusion Transceiver Module (ITM) will control the premium Vehicle Theft Security System (VTSS) on export vehicles. Premium VTSS also includes a battery-backed siren for the audible alert. In addition to the other features of the base VTSS the ITM is used to monitor the interior of the vehicle for movement while the alarm is set. This feature can also be disabled with three additional lock commands from the Remote Keyless Entry system (which will be confirmed with an audible chirp) during the VTSS pre-arming sequence.

When the alarm is tripped it will actuate the hazard lamps for twenty-five seconds and the siren twenty-eight seconds. After that period if the disturbance is still present only the siren will be activated again for twenty-eight seconds with five seconds intervals between warning cycles. This will continue up to ten times unless the disturbance goes away. Also while the alarm is set the siren will monitor it's Fused B(+) and Siren Signal Control circuits. If either of these circuits become open the siren will trip itself to the alarming state.

NOTE: The intrusion transceiver module and/or siren must never be swapped from one vehicle to another. Once connected to a particular vehicle they will only properly function for that vehicle.

NOTE: If the VTSS indicator lamp comes on after ignition on and stays on, the PCI bus communication with the powertrain control module possibly has been lost.