Vehicle Theft Security System

VEHICLE THEFT SECURITY SYSTEM

The ElectroMechanical Instrument Cluster (EMIC) is used on this vehicle to control and integrate many of the functions and features included in the Vehicle Theft Security System (VTSS). The EMIC is also sometimes referred to as the Cab Compartment Node (CCN). In the VTSS, the EMIC receives inputs indicating the status of the door ajar switches and the ignition switch. The EMIC will process the information from all of these inputs, internally controls the security indicator as appropriate, and sends electronic messages to the Totally Integrated Power Module (TIPM) over the Controller Area Network (CAN) data bus. The TIPM internally controls the outputs to the hazard warning lamps and the horn as appropriate.

The hard wired circuits between components related to the VTSS may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds.

However, conventional diagnostic methods will not prove conclusive in the diagnosis of the VTSS or the electronic controls or communication between modules and devices that provide some features of the VTSS. The most reliable, efficient, and accurate means to diagnose the VTSS or the electronic controls and communication related to VTSS operation requires the use of a diagnostic scan tool. See the Vehicle Theft Security System menu item on the scan tool. Refer to the appropriate diagnostic information.

Following are paragraphs describing the operation of each of the VTSS features. See the owner's manual in the vehicle glove box for the features, use and operation of the VTSS.

ENABLING

The EMIC must have the VTSS function electronically enabled in order for the VTSS to perform as designed. The logic in the EMIC keeps its VTSS function dormant until it is enabled using a diagnostic scan tool. The VTSS function of the EMIC is enabled on vehicles equipped with the VTSS option at the factory, but a service replacement EMIC must be VTSS-enabled by the dealer using a diagnostic scan tool. Refer to the appropriate diagnostic information.

ARMING

Passive arming of the VTSS occurs when the vehicle is exited with the key removed from the ignition switch, the headlamps are turned OFF, and the doors are LOCKED while they are open using the power lock switch. Active arming occurs when the LOCK button on the Remote Keyless Entry (RKE) transmitter is depressed to lock the vehicle. For active arming to occur, the doors must be closed and the ignition switch must be in the OFF position when the RKE transmitter LOCK button is depressed. The power lock switch will not function if the key is in the ignition switch or the headlamps are turned ON with the driver side front door open.

Pre-arming of the VTSS is initiated when a door is open when the vehicle is locked using a power door lock switch or when the RKE transmitter LOCK button is depressed. Pre-arming will not occur if the key is in the ignition switch or the headlamps are turned ON with the driver side front door open. When the VTSS is pre-armed, the arming sequence is delayed until all of the doors have been closed. The VTSS will remain in pre-armed mode until after all doors have been closed, or until the interior lighting load shed threshold is surpassed (about eight minutes).

Once the VTSS begins the passive or active arming sequence, the security indicator in the instrument cluster will flash rapidly for about 16 seconds. This indicates that VTSS arming is in progress. If the ignition switch is turned to the ON position, a door is opened, a door is unlocked by any means, or the RKE PANIC button is depressed during the 16 second arming process, the security indicator will stop flashing and the arming process will abort. Once the 16 second arming sequence is successfully completed, the security indicator will flash at a slower rate, indicating that the VTSS is armed.

DISARMING

Since this vehicle is not equipped with lock cylinder switches, passive disarming of the VTSS is only possible if the vehicle is equipped with the optional Sentry Key Immobilizer System (SKIS). On vehicles with SKIS, turning the ignition switch to the ON position using a valid SKIS key will passively disarm VTSS. Active disarming of the VTSS occurs when the vehicle is unlocked by depressing the UNLOCK button of the RKE transmitter. Once the alarm has been activated, either disarming method will also deactivate the alarm. Depressing the PANIC button on the RKE transmitter will not disarm the VTSS.

POWER-UP MODE

When the armed VTSS senses that the battery has been disconnected and reconnected, it enters the power-up mode. In the power-up mode the alarm system remains armed following a battery failure or disconnect. If the VTSS was armed prior to a battery disconnect or failure, the technician or vehicle operator will have to actively or passively disarm the alarm system after the battery is reconnected. The power-up mode will also apply if the battery goes dead while the system is armed, and battery jump-starting is attempted. The VTSS will be armed until the technician or vehicle operator has actively or passively disarmed the alarm system. If the VTSS is in the disarmed mode prior to a battery disconnect or failure, it will remain disarmed after the battery is reconnected or replaced, or if jump-starting is attempted.

TAMPER ALERT

The VTSS tamper alert feature will pulse the horn 3 times upon VTSS disarming, if the alarm was triggered and has since timed-out (about 18 minutes), or if the battery has been disconnected and reconnected. This feature alerts the vehicle operator that the VTSS alarm was activated while the vehicle was unattended.