Symptom Chart

WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM CHART

Condition	Possible Sources	Action
No communication with the Smart Junction Box (SJB)	Fuse(s) Wiring, terminals or connectors SJB	REFER to MODULE COMMUNICATIONS NETWORK -- FUSION, MILAN & MKZ article.
The alarm system does not arm/disarm - using the Integrated Keyhead Transmitter (IKT) key	IKT key concern Anti-theft system concern SJB	NOTE: It may be necessary to verify the perimeter alarm system is armed by opening a door using an interior door handle after the pre-arm phase has completed. If checking the vehicle for being correctly disarmed, it is only necessary to press the unlock button on the IKT key, then open the door using an interior door handle. Arm the alarm system using one of the IKT keys, then disarm the alarm system using the same IKT key. Repeat this process with the second IKT key. If the alarm system arms and disarms correctly with both IKT keys, the vehicle is operating to design intent. INSTRUCT the customer on the correct operation of the vehicle and the perimeter alarm system. If the alarm system does not arm and/or disarm correctly with both IKT keys, INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES -- FUSION, MILAN & MKZ article. CLEAR the DTCs. REPEAT the self-test. TEST the system for correct operation.
The alarm system does not arm/disarm - using the keyless entry keypad	Keyless entry keypad SJB	REFER to HANDLES, LOCKS, LATCHES & ENTRY SYSTEMS -- FUSION, MILAN & MKZ article.
The alarm system does not operate correctly - from the driver door	Door ajar switch(es) SJB	GO to PINPOINT TEST A .
The alarm system does not operate correctly - alarm does not activate with hood ajar/open	Wiring, terminals or connectors Hood switch SJB	GO to PINPOINT TEST B .
The alarm system does not operate correctly - flashers or horn do not cycle during anti-theft activation	Horn system concern Turn signals system concern SJB	GO to PINPOINT TEST C .
The alarm system does not operate correctly - the alarm does not inhibit from the luggage compartment lid disarm switch	Wiring, terminals or connectors Luggage compartment lid disarm switch SJB	GO to PINPOINT TEST D .
False alarm activation	Door ajar input Hood ajar input Luggage compartment lid ajar switch input Panic button pressed on an IKT	An intermittent fault exists. MONITOR the SJB alarm event PIDs AL_EVT1 through 4 to identify and isolate the cause of the last alarm activations.