Onvehicle Inspection

CAUTION:

Be sure that the ignition is off if you work near the electric cooling fans or radiator grille. With the ignition on the electric cooling fans may automatically start to run if the engine coolant temperature is high and/or the air conditioning is on.

INSPECT COOLING FAN OPERATION AT LOW TEMPERATURES (Below 83°C (181°F))

(a) Turn the ignition switch on (IG) and air conditioning switch off.

(b) Check that the cooling fan stops.

If not, check the cooling fan relay and engine coolant temperature sensor, and check whether there is disconnection or an open circuit between them.

(c) Disconnect the engine coolant temperature sensor connector.

(d) Check that the cooling fan rotates.

If not, check the fuses, cooling fan relay, ECM and cooling fan, and check for a short circuit between the cooing fan relay and the engine coolant temperature sensor.

(e) Reconnect the engine coolant temperature sensor connector.

INSPECT COOLING FAN OPERATION AT HIGH TEMPERATURES (Above 93°C (199°F))

(a) Start the engine and air conditioning switch off, and raise the engine coolant temperature to above 93°C (199°F).

HINT:

Engine coolant temperature is detected by the engine coolant temperature sensor on the water outlet.

(b) Check that the cooling fan rotates.

If not, replace the engine coolant temperature sensor.

INSPECT COOLING FAN MOTOR

(a) Disconnect the cooling fan motor connector.

(b) Connect the cooling fan connector to the battery and check that the fan motor moves smoothly.

(c) Using an ammeter, measure the current between the terminals.

Standard Current: w/ A/C 11.8 to 14.8 A (at 12 V) w/o A/C 7.9 to 10.9 A (at 12 V)

(d) Connect the cooling fan motor connector.

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