2001 Polaris SLX, PRO 1200, Virage TX, Genesis, Virage TXi, Genesis i Personal Watercraft Service Manual, Page 311Get this manual
Fuellnj!ction System External EMM Sensors
Air Temperature Sensor: The air temperature sensor monitors the temperature of air entering the air silencerThe AT sensor is Positive Temperature Coefficient (PTC) thermistor, resistor whose resistance changes with temperature and alters voltage values accordinglyWhen temperature increases, both resistance and voltage also increaseWhen temperature decreases, resistance and voltage likewise decreaseWater Temperature Sensor: The water temperature sensor is located in the exhaust manifoldIt is held in seat in the water passage of the manifold, but does not actually contact the waterThe sensor has dual purpose; it provides data to the EMM primarily for use in adjusting the airfuel ratio during engine warm-up, and it sends signal to the EMM that will trigger the MFI "check engine" light in the event of an engine overheatThe water temperature sensor is also Positive Temperature Coefficient (PTC) thermistor, resistor whose resistance changes with temperatureWhen temperature increases, both resistance and voltage also increaseWhen temperature decreases, resistance and voltage likewise decreaseIf sensor values are above the limits (engine overheat), the EMM will initiate S.L.O.W1M, store service code, and turn on the MFI "check ;:;;