Vehicle Theft Alarm: Notes

The ElectroMechanical Instrument Cluster (EMIC), sometimes referred to as the Cab Compartment Node (CCN), is used on this model to control and integrate many of the functions and features included in the Vehicle Theft Alarm (VTA). In the VTA system, the CCN receives inputs indicating the status of the door ajar switches, the ignition switch, the liftgate ajar switch, and the power lock switches. In vehicles built for certain export markets where it is required, the hood ajar switch provides a hard wired input to the Totally Integrated Power Module (TIPM) and both the TIPM and the intrusion module provide electronic message inputs to the CCN over the Controller Area Network (CAN) data bus. The CCN processes the information from all of these inputs, internally controls the security indicator as appropriate, and sends electronic messages to the TIPM over the CAN data bus. The TIPM internally controls the output to the hazard warning lamps and sends a control output to energize or de-energize the horn relay as appropriate. On vehicles with an intrusion module, the horn output of the TIPM is replaced by an output of the siren module that is controlled by the intrusion module.

Following are paragraphs that briefly describe the operation of each of the VTA features. See the owner's manual in the vehicle glove box for more information on the features, use and operation of the VTA.