Symptom Chart

WARNING: This page is about a different car, the 2005 Lincoln LS. 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 instrument cluster module	Circuitry Instrument cluster	GO to PINPOINT TEST A .
No communication with the front electronic module (FEM)	Circuitry FEM	REFER to MULTIFUNCTION ELECTRONIC MODULES to continue diagnosis of the FEM.
No communication with the rear electronic module (REM)	Circuitry REM	REFER to MULTIFUNCTION ELECTRONIC MODULES to continue diagnosis of the REM.
No communication with the restraint control module (RCM)	Circuitry RCM	REFER to SUPPLEMENTAL RESTRAINT SYSTEM to continue diagnosis of the RCM.
No communication with the electronic parking brake module	Circuitry Parking brake module	REFER to PARKING BRAKE & ACTUATION to continue diagnosis of the parking brake module.
Incorrect fuel gauge indication	Fuel tank Circuitry Jet pump module Fuel delivery module Rear electronic module (REM) Instrument cluster	GO to PINPOINT TEST B .
Incorrect temperature gauge indication	Powertrain control module (PCM) Instrument cluster	GO to PINPOINT TEST C .
The low fuel warning indicator is never/always on	Instrument cluster	GO to PINPOINT TEST D .
The speedometer is inoperative	Anti-lock brake system (ABS) Instrument cluster	GO to PINPOINT TEST E .
The odometer is inoperative	Instrument cluster	GO to PINPOINT TEST F .
The tachometer is inoperative	Powertrain control module (PCM) Instrument cluster	GO to PINPOINT TEST G .
The door ajar indicator is inoperative (chime is operative) does not operate correctly	Instrument cluster	GO to PINPOINT TEST H .
The safety belt warning indicator is never/always on	Circuitry Safety belt switch (part of buckle end) Instrument cluster	GO to PINPOINT TEST I .
The low oil pressure warning indicator is never/always on	Circuitry Engine oil pressure Engine oil pressure switch Front electronic module (FEM) Instrument cluster	GO to PINPOINT TEST J .
The charging system warning indicator is never/always on	Charging system Powertrain control module (PCM) Instrument cluster	GO to PINPOINT TEST K .
The brake warning indicator is never on	Circuitry Brake fluid level sensor Front electronic module (FEM) Parking brake module Instrument cluster	GO to PINPOINT TEST L .
The brake warning indicator is always on	Circuitry Low brake fluid level Low brake pressure Brake fluid level sensor Anti-lock brake system (ABS) Front electronic module (FEM) Parking brake module Instrument cluster	REFER to ANTI-LOCK CONTROL to continue diagnosis.
The high beam indicator is never/always on	Instrument cluster	GO to PINPOINT TEST M .
The low washer fluid warning indicator is never/always on	Circuitry Low washer fluid switch Front electronic module (FEM) Instrument cluster	GO to PINPOINT TEST N .
The anti-lock brake system (ABS) warning indicator is never on	ABS module Instrument cluster	GO to PINPOINT TEST O .
The anti-lock brake system (ABS) warning indicator is always on	ABS module Instrument cluster	REFER to ANTI-LOCK CONTROL to continue diagnosis.
The traction control indicator and advance traction control indicators are never/always on	Anti-lock brake system (ABS) module Instrument cluster	GO to PINPOINT TEST P .
The electronic throttle control indicator is never/always on	Powertrain control module (PCM) Instrument cluster	GO to PINPOINT TEST Q .
The malfunction indicator lamp (MIL) is never/always on	Powertrain control module (PCM) Instrument cluster	GO to PINPOINT TEST R .
The turn/hazard indicator is never/always on	Instrument cluster	GO to PINPOINT TEST S .
The steering wheel column lock warning indicator is never/always on	Steering column lock Instrument cluster	GO to PINPOINT TEST T .
The speed control indicator is never/always on	Powertrain control module (PCM) Instrument cluster	GO to PINPOINT TEST U .
The engine over-temperature warning indicator is never/always on	Powertrain control module (PCM) Instrument cluster	GO to PINPOINT TEST V .
The air bag warning indicator is never on	Circuitry Restraint control module (RCM) Instrument cluster	GO to PINPOINT TEST W .
The air bag warning indicator is always on	Restraint control module (RCM) Instrument cluster	REFER to SUPPLEMENTAL RESTRAINT SYSTEM to continue diagnosis of the restraint control system.
The check fuel cap indicator is never/always on	Fuel evaporative system Powertrain control module (PCM) Instrument cluster	GO to PINPOINT TEST X .
The integrated circuit display is inoperative	Instrument cluster	GO to PINPOINT TEST Y .
The instrument cluster is inoperative	Circuitry Instrument cluster	GO to PINPOINT TEST Z .