Symptom Chart: Anti-Theft - Perimeter

WARNING: This page is about a different car, the 2013 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

Diagnostics in this service information assumes a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to DIAGNOSTIC METHODS for information about these practices.

SYMPTOM DESCRIPTION - ANTI-THEFT - PERIMETER

Condition	Possible Sources	Actions
The alarm system does not activate from an unauthorized entry at the hood	Wiring, terminals or connectors Hood switch BCM	GO to PINPOINT TEST A .
The alarm system does not activate from an unauthorized entry at a door	Door ajar input	DIAGNOSE the courtesy lamps always on. REFER to INTERIOR LIGHTING SYSTEM, DIAGNOSIS AND TESTING .
The alarm system does not activate from an unauthorized entry at the liftgate	Liftgate ajar input Wiring, terminals or connectors Liftgate anti-theft inhibit switch (part of the lock cylinder) BCM	For vehicles without the police package option, DIAGNOSE the courtesy lamps always on. REFER to INTERIOR LIGHTING SYSTEM, DIAGNOSIS AND TESTING For vehicles with the police package option, GO to PINPOINT TEST F .
The alarm system activates when opening the liftgate with a correctly cut key	Wiring, terminals or connectors Liftgate anti-theft inhibit switch (part of the lock cylinder) BCM	GO to PINPOINT TEST G .
The alarm system does not arm/no turn signal flash confirmation	Door ajar input Hood ajar input Liftgate ajar input Turn signals Keyless entry keypad concern RKE transmitter concern BCM	GO to PINPOINT TEST C .
No horn output during alarm activation	Horn	DIAGNOSE the inoperative horn. REFER to HORN SYSTEM .
No turn signal flash during alarm activation	Turn signals	DIAGNOSE the inoperative turn signal. REFER to EXTERIOR LIGHTING SYSTEM .
No courtesy lamp flash during alarm activation	Courtesy lamps	DIAGNOSE the inoperative courtesy lamps. REFER to INTERIOR LIGHTING SYSTEM, DIAGNOSIS AND TESTING
False alarm activation	Door ajar input Hood switch input Liftgate ajar input Panic button pressed on an RKE transmitter A valid PATS key read is NOT received when the ignition transitions to RUN	An intermittent fault exists. MONITOR the BCM alarm event PIDs to identify and isolate the cause of the last alarm activation.