Symptom Chart

WARNING: This page is about a different car, the 2008 Mercury Sable, 2008 Ford Taurus X, and 2008 Ford Taurus. 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)	Wiring, terminals or connectors SJB	REFER to MODULE COMMUNICATIONS NETWORK article.
No communication with the Instrument Cluster (IC)	Wiring, terminals or connectors IC	REFER to MODULE COMMUNICATIONS NETWORK article.
All door locks are inoperative	Fuse Wiring, terminals or connectors SJB	Go to Pinpoint Test A .
A single/more than one door lock is inoperative	Wiring, terminals or connectors Door lock actuator SJB	Go to Pinpoint Test B .
The door locks operate only one way	Wiring, terminals or connectors SJB	Go to Pinpoint Test C .
All door locks are inoperative from one switch	Wiring, terminals or connectors Door lock control switches	Go to Pinpoint Test D .
The luggage compartment lid latch release is inoperative/does not operate correctly	Wiring, terminals or connectors Luggage compartment lid release switch Luggage compartment lid latch SJB	Go to Pinpoint Test F .
The liftgate latch release is inoperative/does not operate correctly	Wiring, terminals or connectors Liftgate release switch Liftgate latch Liftgate/Trunk Module (LTM) SJB	Go to Pinpoint Test G .
The doors do not lock/unlock using the keyless entry keypad	Wiring, terminals or connectors Keyless entry keypad SJB	Go to Pinpoint Test H .
The keyless entry keypad illumination is inoperative/does not operate correctly	Wiring, terminals or connectors Keyless entry keypad SJB	Go to Pinpoint Test I .
The Remote Keyless Entry (RKE) transmitter is inoperative	Integrated Keyhead Transmitter (IKT) IKT battery IKT button pressed a substantial amount of times while outside the range of the vehicle IKT programming SJB	Go to Pinpoint Test J .
An individual button/feature is inoperative from the Remote Keyless Entry (RKE) transmitter	Door locks Horn system Liftgate or luggage compartment lid release Turn signal system IKT	Go to Pinpoint Test K .
The Remote Keyless Entry (RKE) transmitter has poor range performance	IKT IKT battery Aftermarket systems High power devices TV/radio transmission towers SJB	Go to Pinpoint Test L .
The autolock does not operate correctly	Wiring, terminals or connectors Programming Door ajar switches SJB	Go to Pinpoint Test M .
The smart unlock does not operate correctly	Key-in-ignition switch Door ajar switch input SJB	Go to Pinpoint Test N .
The Remote Keyless Entry (RKE) two step door unlocking does not operate correctly	Two step door unlocking is disabled	PROGRAM the two step door unlocking. REFER to Stepped Unlock Programming . TEST the system for normal operation.
The memory seat does not operate correctly using the Remote Keyless Entry (RKE) transmitter	SJB Driver Seat Module (DSM)	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.