2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 163Get this manual
500 EFI FUEL SYSTEM CRANKSHAFT POSITION SENSOR (CPS)
General Information
The engine speed sensor is essential to engine operation, constantly monitoring the rotational speed (RPM) of the crankshaft
Crankshaft Position Sensor Test
The crankshaft position sensor is sealed, nonserviceable assemblyIf fault code diagnosis indicates problem within this area, test and correct as follows: 1Disconnect main harness connector from ECU2Connect an ohmmeter between the pin terminalsA resistance value of 185W 20 at room temperature (20 C, 68 F) should be obtainedIf resistance is correct, check the mounting, air gap, toothed ring gear (damage, runout, etc, and flywheel key
Interrupt CPS