Legend Coupe V6-2675cc 2.7L SOHC FI (1988)
Radiator Cooling Fan Motor: Description and Operation
Cooling Fan Control
FAN CONTROL SYSTEM
The fan control unit controls the operation of the radiator fan and condenser fan.
It uses inputs from the coolant temperature switch and A/C pressure switch (A and B) on the A/C system to determine when the fans should run
and at what speed.
Additionally the temperature switch shuts down the A/C system if the coolant temperature exceeds 110°C (230 ° F). If the pressure in the A/C
system is higher than normal, pressure switch B closes and the fans will run at high speed only. See Heating and Air Conditioning/ Air
Conditioner Control System for description and specification of that function.
FAN TIMER SYSTEM
When the engine oil temperature is above approx. 105°C (221°F) after the engine is stopped, the condenser fan goes into operation to cool the
engine for a maximum of 3O minutes.
When the temperature falls below approx. 90°C (194°F), the fan is stopped.
The fan motor runs at a low speed to decrease operation noise by using a resistor to the motor voltage.
The oil temperature switch is located on the rear cylinder head cover and the fan timer unit is located under the PGM-FI ECU cover.
If necessary, the fan begins operation 5 seconds after the ignition switch is turned off.
