2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 153Get this manual

2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 153

500 EFI FUEL SYSTEM FUEL LINES Quick Connect RemovalInstallation CAUTION Verify fuel system has been depressurized before
engine coolant temperature, air temperature, intake manifold air pressure and battery voltageThe ECU compares the input signals
to the programmed maps in its memory and determines the appropriate fuel and spark requirements for the immediate operating
conditionsThe ECU then sends output signals to set the injector duration and ignition timing Squeeze Connector Tabs During
operation, the ECU continually performs diagnostic check of itself, each of the sensors, and system performanceIf fault is
detected, the ECU turns on the Malfunction Indicator Light (MIL) (Check Engine Light) on the speedometer and stores the fault
code in its fault memoryA technician can access the stored fault codes manually using "blink code" diagnosis flashed out
through the instrument cluster or using the Digital Wrench Diagnostic SoftwareThe ECU requires minimum of 7.0 volts to operateThe
memory in the ECU is operational the moment the battery cables are connectedDepending on the significance or severity of