Symptom Table

WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM TABLE

Condition	Possible Sources	Action
No communication with the instrument cluster	Fuse(s) Circuitry Instrument cluster	GO to PINPOINT TEST A .
Incorrect fuel gauge indication	Circuitry Fuel tank and/or lines Fuel tank transfer tube Fuel pump module Fuel level sensor Instrument cluster	GO to PINPOINT TEST B .
Incorrect temperature gauge indication	Instrument cluster Powertrain control module (PCM)	GO to PINPOINT TEST C .
The low oil pressure warning indicator is never/always on	Circuitry Smart junction box (SJB) Engine oil pressure switch Instrument cluster	GO to PINPOINT TEST D .
The speedometer/odometer is inoperative	Powertrain control module (PCM) Instrument cluster	GO to PINPOINT TEST E .
The tachometer is inoperative	Instrument cluster Powertrain control module (PCM)	GO to PINPOINT TEST F .
The low fuel warning indicator is never/always on	Fuel gauge Instrument cluster	GO to PINPOINT TEST G .
The charging system warning indicator is never/always on	Powertrain control module (PCM) Instrument cluster	GO to PINPOINT TEST H .
The brake warning indicator is never/always on	Circuitry Anti-lock brake system (ABS) module Smart junction box (SJB) Parking brake switch Brake fluid level switch Instrument cluster	GO to PINPOINT TEST I .
The malfunction indicator lamp (MIL) is never on	Powertrain control module (PCM) Instrument cluster	GO to PINPOINT TEST J .
The malfunction indicator lamp (MIL) is always on	Circuitry Powertrain control module (PCM) Instrument cluster	REFER to INTRODUCTION - GASOLINE article to continue diagnosis of the MIL.
The safety belt warning indicator is inoperative/does not operate correctly	Restraint Control Module (RCM) Instrument cluster	GO to PINPOINT TEST K .
The air bag warning indicator is never/always on	Restraint control module (RCM) Instrument cluster	GO to PINPOINT TEST L .
The LH turn signal indicator is never/always on	Smart junction box (SJB) Instrument cluster	GO to PINPOINT TEST M .
The RH turn signal indicator is never/always on	Smart junction box (SJB) Instrument cluster	GO to PINPOINT TEST N .
The high beam indicator is never/always on	Smart junction box (SJB) Instrument cluster	GO to PINPOINT TEST O .
The traction control indicator is never/always on	ABS module All wheel drive (AWD) system Instrument cluster	GO to PINPOINT TEST P .
The anti-lock brake system (ABS) warning indicator is never/always on	ABS module Instrument cluster	GO to PINPOINT TEST Q .
The speed control indicator is never/always on	Powertrain control module (PCM) Instrument cluster	GO to PINPOINT TEST R .
The wrench indicator is never/always on	Transmission control module (TCM) Powertrain control module (PCM) Instrument cluster	GO to PINPOINT TEST S .
The check fuel cap warning indicator is never/always on	Powertrain control module (PCM) Instrument cluster	GO to PINPOINT TEST T .
The low washer fluid indicator is never/always on	Circuitry Low washer fluid switch Smart junction box (SJB) Instrument cluster	GO to PINPOINT TEST U .
The low coolant level indicator is never/always on	Circuitry Low coolant level switch Smart junction box (SJB) Instrument cluster	GO to PINPOINT TEST V .
The door ajar warning indicator is inoperative/does not operate correctly	Smart junction box (SJB) Instrument cluster	GO to PINPOINT TEST W .
The instrument cluster is inoperative	Fuse(s) Circuitry Instrument cluster	GO to PINPOINT TEST X .