Circuit Description

Cooling fan motor is controlled by PCM through cooling fan relay. PCM uses Engine Coolant Temperature (ECT) sensor output to calculate when to operate engine cooling fan motor. When engine temperature is more than 208°F (98°C), PCM will provide a ground path for cooling fan relay and activate cooling fan motor. When engine temperature drops to less than 199°F (93°C), PCM will remove ground path and deactivate cooling fan motor. DTC P0480 will set when output voltage check fails with cooling fan motor on and condition is present for 5 seconds.