Radiator Fan
Radiator FanDESCRIPTION
MODELS WITHOUT A/C
The radiator fan ON-OFF control is accomplished according to signals from the engine coolant temperature sensor and the vehicle speed sensor.
MODELS WITH A/C
To reduce fan noise, the fan output can be switched to Low or High according to the load on A/C, coolant temperature, and vehicle speed. This control is accomplished by a circuit as shown below; the output is changed by switching the connection of two motors between serial and parallel instead of using components such as resistors.
FUNCTION
MODELS WITHOUT A/C
The ON-OFF control of the radiator fan is performed by the ECM which receives signals from the engine coolant temperature sensor and the vehicle speed sensor.
MODELS WITH A/C
On models equipped with an air conditioning system, the ECM receives signals from the engine coolant temperature sensor, vehicle speed sensor and A/C switch, and according to these signals, the ECM turns ON or OFF the radiator main fan and sub fan simultaneously (and also selects the Hi or Low fan speed in turbo model).