Symptom Chart

WARNING: This page is about a different car, the 2009 Ford Mustang. 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 .
The anti-theft system does not arm/disarm - using the door disarm switch	Wiring, terminals or connectors Door disarm switch SJB	Go to Pinpoint Test A .
The anti-theft system does not arm/disarm - using the remote keyless entry (RKE) transmitter	RKE transmitter SJB	Go to Pinpoint Test B .
The anti-theft system does not disarm - using the ignition lock cylinder	Wiring, terminals or connectors Controller area network (CAN) error Inoperative/unprogrammed key Passive anti-theft system (PATS) transceiver PCM SJB	REFER to ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) to continue diagnosis of the PATS.
The anti-theft system does not operate correctly - no anti-theft alarm horn or traffic horn	Wiring, terminals or connectors Traffic horn Anti-theft alarm horn SJB	Go to Pinpoint Test C .
The anti-theft system does not operate correctly - anti-theft alarm horn and traffic horn are continuously on	Wiring, terminals or connectors SJB	Go to Pinpoint Test D .
The anti-theft system does not operate correctly - turn signals do not flash when arming	Wiring, terminals or connectors Door ajar switch(es) Hood switch Luggage compartment lid ajar switch SJB	Go to Pinpoint Test E .
The alarm system does not operate correctly - the alarm activates/does not activate when the luggage compartment is opened with the key	Wiring, terminals or connectors Luggage compartment lid disarm switch SJB	Go to Pinpoint Test F .
The alarm system does not operate correctly - intrusion and inclination sensing	Fuse Wiring, terminals or connectors Intrusion/inclination sensor module SJB	Go to Pinpoint Test G .