1999 Polaris PWC Genesis, Ficht, X-45 Service Manual, Page 269Get this manual

1999 Polaris PWC Genesis, Ficht, X-45 Service Manual, Page 269

FICHT- FUEL INJECTION Theory Engine Management Module (EMM) continued Battery 12 Volts Alternator variable 38 to 45 Volts
Polaris diagnostic softwareThis will ensure the EMM does not over advance or retard ignition timing, which could damage the
engine Internal EMM Sensors Five sensors are located inside the EMMbarometric pressure, EMM temperature, alternator 38 to
45 volt system, battery 12 volts, and ROM verificationSince none are serviceable parts, failure correction would require
replacement of the EMMBarometric Pressure (BP) Sensor: The BP sensor is silicon pressure sensor having diaphragm sealed air
passage that generates an AC voltage signalIt senses ambient air pressure through screened port that's open to atmosphereThe
BP signal enables the EMM to compensate for pressure changes caused by altitude so it can adjust fuel flow accordinglyIf
sensed values are out of limits, or the sensor or circuit fails, the EMM will turn on the MFI "check engine" light, and store
service codeEMM Temperat ure Sensor: Monitors fuel injector driver circuitry temperature to prevent it from exceeding design