Radiator Cooling Fan Motor: Testing and Inspection
ELECTRIC COOLING FANON-VEHICLE INSPECTION
1. CHECK COOLING FAN OPERATION WITH LOW TEMPERATURE (Below 90°C (194°F))
a) Turn the ignition switch ON.
b) Check that the cooling fan stops.
If not, check the cooling fan relay and ECT sensor, and check for separated connector or severed wire between the cooling fan relay and ECT sensor.
c) Disconnect the ECT 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 cooling fan relay and ECT sensor.
e) Reconnect the ECT sensor connector.
2. CHECK COOLING FAN OPERATION WITH HIGH TEMPERATURE (Above 96°C (205°F))
a) Start the engine, and raise coolant temperature to above 96°C (205°F).
b) Check that the cooling fan rotates.
If not, replace the ECT sensor.
3. INSPECT COOLING FAN
a) Disconnect the cooling fan connector.
b) Connect battery and ammeter to the connector.
c) Check that the cooling fan rotates smoothly, and check the reading on the ammeter.
Standard amperage: 7.8 - 11.8 A
d) Reconnect the cooling fan connector.
4. INSPECT FAN REGISTER
5. INSPECT ECT SENSOR
6. INSPECT ECM
Check the voltage between ECM terminals FAN and E1.