2009 Polaris Sportsman 850 XP EFI EPS Service Manual, Page 66Get this manual
ELECTRONIC FUEL INJECTION TPS Replacement
NOTE: The correct position of the TPS angle on the throttle body is established and set at the factoryIf the TPS is replaced, repositioned or loosened it must be recalibratedRefer to the "TPS Adjustment" procedure12345Remove the seat and upper left-hand side panel (see Chapter "Seat and Side Panels")Loosen the hose clamp retaining the intake boot to the intake plenumRemove the (4) bolts retaining the intake plenum and throttle bodyPosition the throttle body to access the TPS harness and mounting screwsDisconnect the harness from the TPSDisconnect
ENGINE COOLANT TEMPERATURE SENSOR (ECT)
Operation Overview
The engine coolant temperature sensor measures coolant temperatureThe engine temperature sensor is Negative Temperature Coefficient (NTC) type sensor, as the temperature increases the resistance decreases
Coolant passes through the cylinder and by the sensor probe, varying resistance reading which is relayed to the ECUThis signal is processed by the ECU and compared to its programming for determining the fuel and ignition requirements during operationThe ECU also uses this signal to determine when to activate the fan during operation