Antitheft - Perimeter

The perimeter alarm uses the door, hood, liftgate and liftgate glass ajar switches. This feature provides an audible and visual alarm at the exterior of the vehicle when unauthorized access to the vehicle is detected. The arming of the perimeter feature is initiated when a lock request is received from the customer while the ignition switch is in the OFF/ACC position. This may be obtained front any of the following sources: 1) driver door lock cylinder, 2) remote lock command, 3) any trim panel switch if any from or liftgate door is open (as long as the smart unlocking feature is not activated) or 4) keypad command (when keypad option is available). Once all the doors, hood and liftgate are closed, the parking lamps will flash to signify that all trigger inputs have entered the pre-arm phase.

When pre-armed, armed, or active, the perimeter alarm feature will disarm during on of the following events:
^ request from a keyfob or keypad to unlock the vehicle, independent of ignition status.
^ a door key requests alarm disarming (RESET).
^ the ignition transitions to RUN/START.

When the perimeter alarm feature is armed, the alarm will activate during one of the following events:
^ any door/liftgate becomes ajar.
^ the hood becomes ajar.

The deactivation of an active alarm is accomplished by:
^ request from a remote keyfob for a PANIC alarm.
^ five minutes elapsing since the alarm was activated.

The central security module also uses the autolock/relock feature to prevent theft of the vehicle.

The door disarm switch is attached to the driver door lock cylinder. The door disarm switch must be triggered before the mechanical lock unlocks. This is to prevent the anti-theft alarm from activating when it should have been disarmed.

The central security module controls the anti-theft system and the keyless entry system. The central security module communicates with the Generic Electronic Module (GEM) to request that the interior lights be turned on/off with use of the keyless entry remote transmitter, and with the GEM to inform when the door is opened.

The central security module communicates the status of each ajar switch to the GEM. The liftgate ajar switch and the liftgate glass ajar switch are wired in series. The central security module cannot distinguish between the two ajar switches. For module communication information, refer to Module Communications Network (Information Bus).