Symptom Chart

Condition	Possible Sources	Action
No communication with the instrument cluster	Powertrain control module (PCM) Restraint Control Module (RCM) Anti-lock brake system (ABS) module Transmission control module (TCM) Smart junction box (SJB)	REFER to MODULE COMMUNICATIONS NETWORK article.
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	PCM Instrument cluster	Go to Pinpoint Test C .
The low oil pressure warning indicator is never/always on	Circuitry Oil pressure switch SJB Instrument cluster	Go to Pinpoint Test D .
The speedometer/odometer is inoperative	ABS module Instrument cluster	Go to Pinpoint Test E .
The tachometer is inoperative	PCM Instrument cluster	Go to Pinpoint Test F .
The low fuel warning indicator is never/always on	Instrument cluster	Go to Pinpoint Test G .
The charging system warning indicator is never/always on	Charging system PCM Instrument cluster	Go to Pinpoint Test H .
The brake warning indicator is never on	Circuitry Parking brake switch Brake fluid level switch SJB ABS module Instrument cluster	Go to Pinpoint Test I .
The brake warning indicator is always on	Circuitry Parking brake switch Brake fluid level switch SJB ABS module Instrument cluster	Go to Pinpoint Test J .
The malfunction indicator lamp (MIL) is never on	PCM Instrument cluster	Go to Pinpoint Test K .
The malfunction indicator lamp (MIL) is always on	Circuitry PCM Instrument cluster	REFER to the Introduction - Gasoline Engines article.
The safety belt warning indicator is inoperative/does not operate correctly	RCM Instrument cluster	Go to Pinpoint Test L .
The air bag warning indicator is never/always on	RCM Instrument cluster	Go to Pinpoint Test M .
The LH turn signal indicator is never/always on	SJB Instrument cluster	Go to Pinpoint Test N .
The RH turn signal indicator is never/always on	SJB Instrument cluster	Go to Pinpoint Test O .
The high beam indicator is never/always on	SJB Instrument cluster	Go to Pinpoint Test P .
The traction control indicator is never/always on	ABS module All wheel drive (AWD) system Instrument cluster	Go to Pinpoint Test Q .
The anti-lock brake system (ABS) warning indicator is never/always on	ABS module Instrument cluster	Go to Pinpoint Test R .
The speed control indicator is never/always on	PCM Instrument cluster	Go to Pinpoint Test S .
The wrench indicator is never/always on	PCM Instrument cluster	Go to Pinpoint Test T .
The check fuel cap warning indicator is never/always on	PCM Instrument cluster	Go to Pinpoint Test U .
The low washer fluid indicator is never/always on	Circuitry Washer fluid level switch SJB Instrument cluster	Go to Pinpoint Test V .
The low coolant level indicator is never/always on	Circuitry Low coolant level switch SJB Instrument cluster	Go to Pinpoint Test W .
The door ajar warning indicator is inoperative/does not operate correctly	SJB Instrument cluster	Go to Pinpoint Test X .
The instrument cluster is inoperative	Fuse Circuitry Instrument cluster	Go to Pinpoint Test Y .