Radiator Cooling Fan Motor: Testing and Inspection

ON-VEHICLE INSPECTION

HINT: It is normal that the cooling fan sometimes rotates when the ignition is turned from ACC to ON.

1. CHECK COOLING FAN OPERATION AT LOW TEMPERATURE (Below 83°C (181°F))
a) Turn the ignition switch to ON with the A/C switch OFF.
b) Check that the cooling fan stops.
2. CHECK COOLING FAN OPERATION AT HIGH TEMPERATURE (Above 100°C (212°F))
a) Start the engine, then raise coolant temperature to above 100°C (212°F).

HINT: Coolant temperature is the value detected by the engine coolant temperature sensor on the cylinder head.

b) Check that the A/C switch is OFF.
c) Check that the cooling fan rotates.
3. INSPECT FAN
a) Disconnect the fan connector.
b) Connect the battery and ammeter to the fan connector.
c) Check that the fan rotates smoothly, then check the reading on the ammeter.
Standard amperage: 7.9 to 10.9 A at 20°C (68°F)
If the amperage is not as specified, replace the cooling fan motor.
d) Reconnect the fan connector.

INSPECTION
1. INSPECT COOLING FAN RELAY
a) Check the resistance.





1) Using an ohmmeter, measure the resistance between the terminals.





Standard

If the resistance is not as specified, replace the relay.
2. INSPECT COOLING FAN RELAY NO.2
a) Check the resistance.





1) Using an ohmmeter, measure the resistance between each terminal.





Standard

If the resistance is not as specified, replace the relay.
3. INSPECT COOLING FAN RESISTOR
a) Using an ohmmeter, measure the resistance between the terminals.
Resistance: 1.17 to 1.43 Ohms at 20°C (68°F)