Integra L4-1678cc 1.7L DOHC (VTEC) FI (1992)
Radiator Cooling Fan Motor: Description and Operation
The fan control unit controls the operation of the radiator and condenser fans. It uses inputs from the coolant temperature sensor and A/C pressure
switch on the A/C system to determine when the fans should run and at what speed. When the coolant temperature is about 183°F the fan turns on at low
speed and goes off again at 172°F. When the coolant temperature is about 194°F the fan turns on at high speed and goes off again at 183°F. When the
coolant temperature is about 230°F the A/C cut turns on and goes off again at 226°F.
When the engine oil temperature is above about 221°F after the engine is stopped, then condenser fan goes into operation to cool the engine for a
maximum of 30 minutes. When the temperature falls below about 194°F, then fan is stopped. The fan motor runs at low speed to decrease operating
noise by using a in-line resistor. If required, the fan begins operation 5 seconds after the ignition switch is turned Off.