Symptom Chart

WARNING: This page is about a different car, the 2005 Ford Pickup. 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 vehicle security module	Circuit or connection in the universal asynchronous receiver-transmitter (UART)-based protocol (UBP) network Vehicle security module	REFER to MULTIFUNCTION ELECTRONIC MODULES .
A single/more than one door lock is inoperative	Door lock control switches Door lock actuators Circuitry Vehicle security module	GO to PINPOINT TEST A .
The doors do not lock/unlock using the remote keyless entry keypad	Remote keyless entry (RKE) keypad Circuitry Vehicle security module	GO to PINPOINT TEST B .
The doors do not lock/unlock using the remote keyless entry transmitter	Remote keyless entry (RKE) transmitter battery RKE transmitter RKE transmitter programming Aftermarket systems High power devices TV/radio transmission towers Vehicle security module	GO to PINPOINT TEST C .
The remote keyless entry transmitter is out of synchronization	Remote keyless entry (RKE) transmitter RKE transmitter button pressed a substantial amount of times while outside the range of the vehicle Vehicle security module	GO to PINPOINT TEST D .
The auto-lock does not operate correctly	Door ajar switches Circuitry Universal asynchronous receiver-transmitter (UART)-based protocol (UBP) network Vehicle security module	GO to PINPOINT TEST E .
The smart lock does not operate correctly	Circuitry Door lock control switches Driver door ajar switch Universal asynchronous receiver-transmitter (UART)-based protocol (UBP) communications network Vehicle security module	GO to PINPOINT TEST F .
Panic feature is inoperative/does not operate correctly	Remote keyless entry (RKE) transmitter Circuitry Vehicle security module	GO to PINPOINT TEST G .
The remote keyless entry keypad illumination is inoperative	Remote keyless entry (RKE) keypad Circuitry Vehicle security module	GO to PINPOINT TEST H .
The power door unlock inhibit feature is inoperative	Feature not enabled Vehicle security module	ENABLE the power door unlock inhibit feature. INSTALL a new vehicle security module. REFER to MULTIFUNCTION ELECTRONIC MODULES .
The remote keyless entry transmitter has poor range performance	Aftermarket system High power devices TV/radio transmission towers Remote keyless entry (RKE) transmitter Vehicle security module	GO to PINPOINT TEST I .