Symptom Chart

WARNING: This page is about a different car, the 2010 Lincoln Town Car. 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 driver door module (DDM)	Fuse(s) Wiring, terminals or connectors DDM	REFER to MODULE COMMUNICATIONS NETWORK article.
No communication with the lighting control module (LCM)	Fuse(s) Wiring, terminals or connectors LCM	REFER to MODULE COMMUNICATIONS NETWORK article.
No communication with the liftgate/trunk module (LTM)	Fuse(s) Wiring, terminals or connectors LTM	REFER to MODULE COMMUNICATIONS NETWORK article.
All door locks are inoperative	Fuse Wiring, terminals or connectors Luggage compartment lid latch DDM	Go to Pinpoint Test A .
A single/more than one door lock is inoperative	Wiring, terminals or connectors Door lock actuator DDM	Go to Pinpoint Test B .
The door locks operate only one way	Wiring, terminals or connectors Door lock control switch DDM	Go to Pinpoint Test C .
All door locks are inoperative from one switch	Wiring, terminals or connectors Door lock control switch	Go to Pinpoint Test D .
The luggage compartment lid release is inoperative/does not operate correctly	Fuse Wiring, terminals or connectors Luggage compartment lid release solenoid (part of the luggage compartment lid latch) Luggage compartment lid release switch LTM DDM	Go to Pinpoint Test E .
The fuel filler door is inoperative	Fuse Wiring, terminals or connectors Fuel filler door switch Fuel filler interlock catch	Go to Pinpoint Test F .
The doors do not lock/unlock using the keyless entry keypad	Wiring, terminals or connectors Keyless entry keypad DDM	Go to Pinpoint Test G .
The keyless entry keypad illumination is inoperative/does not operate correctly	Fuse Wiring, terminals or connectors Keyless entry keypad DDM	Go to Pinpoint Test I .
The remote keyless entry (RKE) transmitter is inoperative	RKE transmitter battery RKE transmitter button pressed a substantial amount of times while outside the range of the vehicle RKE transmitter programming RKE transmitter Tire pressure monitoring system (TPMS)/RKE antenna DDM	Go to Pinpoint Test I .
An individual button/feature is inoperative from the remote keyless entry (RKE) transmitter	Wiring, terminals or connectors Door locks Horn system Luggage compartment lid release system Parking lamps RKE transmitter LCM DDM	Go to Pinpoint Test J .
The remote keyless entry (RKE) transmitter has poor range performance	Aftermarket systems High power devices TV/radio transmission towers RKE transmitter RKE transmitter battery TPMS/RKE antenna	Go to Pinpoint Test K .
The autolock does not operate correctly	Door ajar switch input Vehicle speed signal message from the instrument cluster (IC) Digital transmission range (TR) sensor message from the IC DDM	Go to Pinpoint Test L .
The smart unlock does not operate correctly	Driver door ajar switch Key-in-ignition switch LCM DDM	Go to Pinpoint Test M .
The auto-unlock does not operate correctly	Door ajar switch input Vehicle speed signal message DDM	Go to Pinpoint Test N .
The memory seat does not operate correctly using the remote keyless entry (RKE) transmitter	Driver seat module (DSM) DDM	ACTIVATE the remote memory. REFER to Remote Memory Activation . TEST the system for normal operation. If the remote memory is still inoperative, REFER to SEATING article to diagnose the memory seat.