COOLING FAN SYSTEM PROBLEM SYMPTOMS TABLE

Tip:

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.
Inspect the fuses related to this system before inspecting the suspected areas below.

Table 1. Cooling Fan System (w/ Air Conditioning System)
Symptom	Suspected Area	Link
Cooling fans do not operate (main and sub fans)	Cooling fan circuit	Click here
	FAN NO. 3 relay	Click here
	Cooling fan motor	Click here
	No. 2 cooling fan motor	Click here
	Air conditioning system	Click here
	ECM	Click here
Cooling fan does not operate (main fan)	Engine coolant temperature sensor	Click here
	Cooling fan circuit	Click here
	FAN NO. 1 relay	Click here
	FAN NO. 2 relay	Click here
	Cooling fan motor	Click here
	ECM	Click here
Cooling fan does not operate (sub fan)	Cooling fan circuit	Click here
	No. 2 cooling fan motor	Click here
	Air conditioning system	Click here
	ECM	Click here
Cooling fans do not stop (main and sub fans)	Cooling fan circuit	Click here
	Air conditioning system	Click here
	FAN NO. 3 relay	Click here
	ECM	Click here
Cooling fan does not stop (main fan)	Engine coolant temperature sensor	Click here
	Cooling fan circuit	Click here
	FAN NO. 1 relay	Click here
	ECM	Click here
Cooling fan speed does not change	Engine coolant temperature sensor	Click here
	Cooling fan circuit	Click here
	FAN NO. 2 relay	Click here
	ECM	Click here

Table 2. Cooling Fan System (w/o Air Conditioning System)
Symptom	Suspected Area	Link
Cooling fan does not operate	Engine coolant temperature sensor	Click here
	Cooling fan circuit	Click here
	FAN NO. 1 relay	Click here
	Cooling fan motor	Click here
	ECM	Click here
Cooling fan does not stop	Engine coolant temperature sensor	Click here
	Cooling fan circuit	Click here
	FAN NO. 1 relay	Click here
	ECM	Click here