Radiator Cooling Fan Motor: Testing and Inspection

COOLING FAN SYSTEM (1NZ-FXE)
ON-VEHICLE INSPECTION
1. INSPECT COOLING FAN AT LOW TEMPERATURE (LOWER THAN 83°C (181°F))
a. Check that the coolant temperature is lower than 83°C (181°F).
b. Check that the cooling fan does not rotate when turn the power switch ON (ACC) with the A/C switch OFF.
2. INSPECT COOLING FAN AT HIGH TEMPERATURE (HIGHER THAN 93°C (199°F))
a. Set the vehicle to inspection mode.
b. Warm up the engine .
c. Check that the cooling fan starts rotating when the coolant temperature is higher than approximately 100°C (212°F) with the A/C switch OFF and that it stops rotating when the temperature is lower than approximately 98°C (208°F).

NOTICE: The coolant temperature is sensed by the water temperature on the water outlet (engine outlet) of the cylinder head.





3. INSPECT COOLING FAN MOTOR
a. Disconnect the cooling fan motor connector.
b. Check that the cooling fan rotates smoothly when the battery is connected to the fan motor connector.
c. Using an ammeter, measure the current with step (b) maintained.
SST 09082-00030, 09083-00150
Standard amperage: 9.2 to 11.0 A
d. Connect the cooling fan motor connector.

INSPECTION





1. INSPECT COOLING FAN RELAY
a. Inspect the resistance.
1. Using an ohmmeter, measure the resistance between the terminals.





Standard

If the resistance is not as specified, replace the cooling fan relay.





2. INSPECT COOLING FAN RELAY NO.2
a. Inspect the resistance.
1. Using an ohmmeter, measure the resistance between the terminals.





Standard

If the resistance is not as specified, replace the cooling fan relay No. 2.
3. INSPECT INTEGRATION RELAY
a. Inspect the resistance of the fan relay.
1. Using an ohmmeter, measure the resistance between the terminals.





Standard





If the resistance is not as specified, replace the integration relay.