Flex FWD V6-3.5L (2010)
Radiator Cooling Fan Speed Sensor: Description and Operation
ENGINE CONTROL COMPONENTS
Fan Speed Sensor (FSS)
The FSS is a Hall-effect sensor that measures the cooling fan clutch speed by generating a waveform with a frequency proportional to the fan speed. If
the cooling fan clutch is moving at a relatively low speed, the sensor produces a signal with a low frequency. As the cooling fan clutch speed
increases, the sensor generates a signal with a higher frequency. The PCM uses the frequency signal generated by the FSS as a feedback for closed
loop control of the cooling fan clutch. For additional information on the cooling fan clutch, refer to the Cooling Fan Clutch.
Cooling Fan Clutch With FSS
