Legend Coupe V6-2675cc 2.7L SOHC FI (1988)
Oil Temperature Sensor/Switch: Description and Operation
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.
