With Intelligent Access (IA)

WARNING: This page is about a different car, the 2014 Lincoln MKX and 2014 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

The Body Control Module (BCM) controls the operation of the perimeter alarm based on the following inputs:

the door ajar switch inputs
liftgate ajar input
hood switch input
keyless entry keypad
door lock control switches
Passive Anti-Theft System (PATS) input,
Remote Keyless Entry (RKE) transmitters
Intelligent Access (IA) input

The BCM receives direct input from all the ajar switches, the hood switch, and the door lock control switches. The Remote Function Actuator (RFA) module receives direct input from the keyless entry keypad, it also receives input from the TPMS module for the RKE and IA features. The BCM receives the door lock/unlock status from the RFA module over the Medium Speed Controller Area Network (MS-CAN) to determine the correct perimeter alarm state.

If the perimeter alarm is armed and the BCM receives an input indicating an unauthorized entry into the vehicle, or the ignition is transitioned to the RUN mode without a programmed PATS key, the BCM activates the perimeter alarm. When the perimeter alarm is activated, the horn sounds and both the turn signals and courtesy lights flash in regular intervals.

If the driver door is unlocked and opened using a key in the door lock cylinder, the perimeter alarm starts a 12 second countdown. During the countdown a chime sounds and the message center displays TO STOP ALARM START VEHICLE. If the alarm is not deactivated during this countdown, the perimeter alarm activates.