Symptom Charts

WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

Symptom Chart - Instrument Cluster

Condition	Possible Sources	Action
No communication with the instrument cluster (IC)	Fuse Wiring, terminals or connectors Instrument cluster (IC)	REFER to MODULE COMMUNICATIONS NETWORK article.
The instrument cluster (IC) is inoperative	Fuses Wiring, terminals or connectors Instrument cluster (IC)	Go to Pinpoint Test A .
Incorrect fuel gauge indication	Wiring, terminals or connectors Fuel level sensor (float and card) Fuel pump module Fuel tank Instrument cluster (IC)	Go to Pinpoint Test B .
Incorrect temperature gauge indication	PCM Instrument cluster (IC)	Go to Pinpoint Test C .
The tachometer is inoperative	PCM Instrument cluster (IC)	Go to Pinpoint Test D .
The speedometer/odometer is inoperative	PCM Instrument cluster (IC)	Go to Pinpoint Test E .
The low fuel warning indicator is never/always on	Instrument cluster (IC)	Go to Pinpoint Test F .
The safety belt warning indicator is inoperative (chime is operative)/does not operate correctly	Lighting control module (LCM) Instrument cluster (IC)	Go to Pinpoint Test G .
The check fuel cap warning indicator is never/always on	PCM Instrument cluster (IC)	Go to Pinpoint Test H .
The BRAKE warning indicator is never on	Wiring, terminals or connectors Parking brake switch Brake fluid level switch Instrument cluster (IC)	Go to Pinpoint Test I .
The BRAKE warning indicator is always on	Wiring, terminals or connectors Parking brake switch Brake fluid level switch ABS module Instrument cluster (IC)	Go to Pinpoint Test J .
The charging system warning indicator is never/always on	Charging system PCM Instrument cluster (IC)	Go to Pinpoint Test K .
The fire suppression indicator is never on (police vehicles only)	Wiring, terminals or connectors Fire suppression system module (FSSM) Instrument cluster (IC)	Go to Pinpoint Test L .
The fire suppression indicator is always on (police vehicles only)	Wiring, terminals or connectors FSSM Instrument cluster (IC)	Go to Pinpoint Test M .
The air suspension indicator is never/always on (if equipped)	Air suspension system Vehicle dynamics module (VDM) Instrument cluster (IC)	Go to Pinpoint Test N .
The high beam indicator is never/always on	High beam headlamps LCM Instrument cluster (IC)	Go to Pinpoint Test O .
The LH/RH turn indicator is never on	Wiring, terminals or connectors LH turn lamps RH turn lamps Instrument cluster (IC)	Go to Pinpoint Test P .
The ABS warning indicator is never/always on	ABS module Instrument cluster (IC)	Go to Pinpoint Test Q .
The traction control indicator is never/always on (if equipped)	ABS module Instrument cluster (IC)	Go to Pinpoint Test R .
The low oil pressure warning indicator is never/always on	Wiring, terminals or connectors Base engine concern Oil pressure switch Instrument cluster (IC)	Go to Pinpoint Test S .
The malfunction indicator lamp (MIL) indicator is never/always on	PCM Instrument cluster (IC)	Go to Pinpoint Test T .
The air bag indicator warning is never/always on	Wiring, terminals or connectors Restraints control module (RCM) Instrument cluster (IC)	Go to Pinpoint Test U .
The speed control indicator is never/always on	Speed control system PCM Instrument cluster (IC)	Go to Pinpoint Test V .
The powertrain malfunction (wrench) warning indicator is never/always on	PCM Instrument cluster (IC)	Go to Pinpoint Test W .
The door/trunk ajar indicator is inoperative (chime is operative)/does not operate correctly	Interior lamps Driver door module (DDM) Instrument cluster (IC)	Go to Pinpoint Test X .
The O/D OFF indicator is never/always on	Transmission O/D off function PCM Instrument cluster (IC)	Go to Pinpoint Test Y .
The engine coolant over temperature warning indicator is never/always on	PCM Instrument cluster (IC)	Go to Pinpoint Test Z .
The tire pressure monitoring system (TPMS) warning indicator is never/always on	TPMS concern Driver door module (DDM) Instrument cluster (IC)	Go to Pinpoint Test AA .
The engine idle hour meter is inoperative (if equipped)	Instrument cluster (IC)	Go to Pinpoint Test AB .

Symptom Chart - Information And Message Center

Condition	Possible Sources	Action
The message center is not operating correctly	Instrument cluster (IC)	Go to Pinpoint Test AC .
The message center display is blank	Instrument cluster (IC)	CARRY OUT the instrument cluster (IC) self-diagnostic test to illuminate all segments of the message center display. If the message center display is illuminated, the system is working correctly at this time. If the message center display is inoperative, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) .
The message center switch does not operate correctly	Wiring, terminals or connectors Message center switch Instrument cluster (IC)	Go to Pinpoint Test AD .
The LOW WASHER FLUID LEVEL message is inoperative/always on	Wiring, terminals or connectors Washer fluid reservoir Instrument cluster (IC)	Go to Pinpoint Test AE .
The DOOR AJAR warning is inoperative	Interior lamp system Driver door module (DDM) Instrument cluster (IC)	Go to Pinpoint Test AF .
The TRUNK AJAR message is inoperative/always on	Luggage compartment lamp Lighting control module (LCM)	Go to Pinpoint Test AG .
The COOLANT OVER TEMPERATURE warning is inoperative	Instrument cluster (IC)	OBSERVE the coolant temperature gauge. If the coolant temperature gauge does not operate correctly, go to Pinpoint Test C . If the coolant temperature gauge operates correctly, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) . TEST the system for normal operation.
The POWERTRAIN MALFUNCTION message is inoperative	Powertrain system Instrument cluster (IC)	RETRIEVE the recorded PCM DTCs from the continuous and on-demand self-tests. If PCM DTCs are recorded, REFER to the Introduction - Gasoline Engines article. If no PCM DTCs are recorded, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) . TEST the system for normal operation.
The CHECK FUEL CAP message is inoperative	PCM Instrument cluster (IC)	RETRIEVE the recorded PCM DTCs from the continuous and on-demand self-tests. If PCM DTCs are recorded, REFER to the Introduction - Gasoline Engines article. If no PCM DTCs are recorded, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) . TEST the system for normal operation.
The LOW FUEL warning is inoperative	Instrument cluster (IC)	OBSERVE the operation of the fuel gauge. If the fuel gauge does not operate correctly, go to Pinpoint Test B . If the fuel gauge operates correctly, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) . TEST the system for normal operation.
The OVERDRIVE ON/OFF message is inoperative	Transmission O/D off function Instrument cluster (IC)	RETRIEVE the recorded PCM DTCs from the continuous and on-demand self-tests. If PCM DTCs are recorded, REFER to the Introduction - Gasoline Engines article. If no PCM DTCs are recorded, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) . TEST the system for normal operation.
The CHECK AIR SUSPENSION message is incorrect	Wiring, terminals or connectors Vehicle dynamics module (VDM) Instrument cluster (IC)	VERIFY the air suspension system is operating correctly. If the air suspension system does not operate correctly, REFER to VEHICLE DYNAMIC SUSPENSION article. If the air suspension is operating correctly, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) . TEST the system for normal operation.
The LOW TIRE PRESSURE, TIRE PRESSURE SENSOR FAULT or TIRE PRESSURE MONITOR FAULT warning is inoperative	Smart junction box (SJB) Instrument cluster (IC)	OBSERVE the operation of the tire pressure monitoring system (TPMS) warning indicator. If the TPMS pressure warning indicator does not operate correctly, go to Pinpoint Test AA . If the TPMS warning indicator operates correctly, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) . TEST the system for normal operation.

Symptom Chart - Warning Chimes

Condition	Possible Sources	Action
No communication with the lighting control module (LCM)	Fuse(s) Wiring, terminals or connectors LCM	REFER to MODULE COMMUNICATIONS NETWORK article.
The headlamps on warning chime does not operate correctly	LCM	Go to Pinpoint Test AH .
The safety belt warning chime does not operate correctly	LCM	Go to Pinpoint Test AI .
The Belt-Minder® feature does not operate correctly	Belt-Minder® deactivated	ACTIVATE the Belt-Minder®. REFER to Belt-Minder® Deactivating/Activating .
	LCM	VERIFY the safety belt warning chime operation. If the safety belt warning chime does not operate correctly, go to Pinpoint Test AI . If the safety belt warning chime operates correctly, INSTALL a new LCM. REFER to MULTIFUNCTION ELECTRONIC MODULES article. TEST the system for normal operation.
The key-in-ignition warning chime is inoperative	Fuse Wiring, terminals or connectors Key-in-ignition warning switch (part of the ignition switch) LCM	Go to Pinpoint Test AJ .
The air bag warning chime does not operate correctly	LCM	Go to Pinpoint Test AI .
The door ajar warning chime does not operate correctly	Wiring, terminals or connectors Luggage compartment lid latch LCM	Go to Pinpoint Test AK .
The chime sounds when the driver door is ajar (no key in ignition and headlamps off)	Wiring, terminals or connectors Key-in-ignition warning switch (part of the ignition switch) LCM	Go to Pinpoint Test AL .
The turn signal on warning chime is inoperative	Turn signal on warning chime disabled LCM	Go to Pinpoint Test AM .
The message center warning chime is inoperative	LCM	CHECK that the message center operates correctly. If the message center does not operate correctly, go to Pinpoint Test AC . If the message center operates correctly, INSTALL a new LCM. REFER to MULTIFUNCTION ELECTRONIC MODULES article.
The fail safe cooling warning chime is inoperative (the temperature gauge is in the HOT range and the engine coolant over temperature warning indicator is illuminated)	LCM	INSTALL a new LCM. REFER to MULTIFUNCTION ELECTRONIC MODULES article. TEST the system for normal operation. If the condition is still present, INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) . TEST the system for normal operation.