COOLING FAN SYSTEM > PROBLEM SYMPTOMS TABLE

for Preparation Click here


HINT:
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.


Cooling Fan System 
Symptom
Suspected Area
See page
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 fans do not change speed (main and sub fans)
Engine coolant temperature sensor
Click here
Cooling fan circuit
Click here
FAN No. 2 relay
Click here
ECM
Click here