Description And Operation: Anti-Theft

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

The perimeter anti-theft system consists of the following:

Door ajar switches
Door disarm switch
Door lock switch
Hood switch
Horn
Liftgate glass ajar switch
Liftgate switch
Keyless entry keypad
RKE transmitter
Turn signal lamps
Smart junction box (SJB)

The perimeter anti-theft feature is controlled by the SJB. The alarm can be armed by:

pressing the LOCK button on the RKE transmitter.
pressing the door lock switch to LOCK with the accompanying door open.
pressing the 7/8 and 9/0 buttons on the keyless entry keypad simultaneously.

In order to arm the alarm, all doors, hood, liftgate and liftgate glass must be closed and the key must be out of the ignition switch. The SJB then monitors all of the inputs and 20 seconds after all of the inputs are closed, the SJB arms the perimeter alarm. From the time each individual input is closed, to the time the perimeter alarm is armed for that particular input, is called the "pre-arm phase". The pre-arm phase is separate for each individual input. If the door lock control switch was pressed to LOCK with the accompanying door open, all of the inputs that are closed (hood, liftgate and liftgate glass) would immediately begin their pre-arm phase. After the opened door is closed, then the doors would begin their pre-arm phase. This would cause the hood, liftgate and liftgate glass to be armed a few seconds before the doors. The perimeter alarm would arm in stages, in relation to which input was closed first after the arming command was given.

In the event of an unauthorized entry, the alarm will be activated by the SJB. When the alarm is activated, the SJB intermittently grounds the horn relay, causing the horn to sound in regular intervals, and intermittently powers the turn signals, causing the turn signal lamps to flash in regular intervals.

The perimeter alarm can be disarmed only by:

pressing the UNLOCK button on the RKE transmitter.
turning the door lock cylinder to the UNLOCK position.
using a valid programmed key to turn the ignition switch to the ON position.
entering the correct vehicle unlock code on the keyless entry keypad.

The perimeter alarm can be deactivated (not disarmed) by pressing the PANIC button on the RKE transmitter. This action will not disarm the alarm, but will stop the alarm from activating (horn sounding and turn signals flashing). The perimeter alarm will continue to be armed.

For additional information on the SJB, refer to MULTIFUNCTION ELECTRONIC MODULES article.

For additional information on the keyless entry keypad and/or transmitter, refer to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS article.