Problem Symptoms Table

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

Symptom	Suspected Area	See page
Cooling fan does not operate	Cooling fan motor
	No. 2 cooling fan motor
	FAN NO. 1 relay
	FAN NO. 2 relay
	FAN NO. 3 relay
	Cooling fan circuit
	ECM
Cooling fan does not stop	FAN NO. 1 relay
	FAN NO. 3 relay
	Cooling fan circuit (for short circuit)
	ECM
Cooling fan speed does not change	FAN NO. 2 relay
	Cooling fan circuit
	ECM