Radiator Cooling Fan Control Module: Description and Operation
Cooling Fan ControlCooling Fan Control:
The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant pressure, and air conditioner ON signal. The control system has 4-step control [HIGH/MIDDLE/LOW/OFF].
Cooling Fan Operation:
Cooling Fan Operation
Cooling Fan Relay Operation:
Cooling Fan Relay Operation
Cooling Fan Motor
The cooling fan operates at each speed when the current flows in the cooling fan motor as follows.
The cooling fan operates at low (LOW) speed when cooling fan motors-1 and -2 are circuited in series under middle speed condition.