Radiator Cooling Fan Control Module: Description and Operation
ENGINE OVER TEMPERATUREDescription
SYSTEM DESCRIPTION
Cooling 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]. The ECM control cooling fan relays through CAN communication line.
Cooling Fan Operation
Cooling Fan Relay Operation
COMPONENT DESCRIPTION
Cooling Fan Motor
The cooling fan operates at low (LOW) speed when cooling fan motors-1 and -2 are circuited in series under middle speed condition.