2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 152Get this manual

2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 152

500 EFI FUEL SYSTEM ELECTRONIC FUEL INJECTION General Information The Electronic Fuel Injection (EFI) system is complete
timing to match the valuesDuring operation the ECU has the ability to re-adjust temporarily, providing compensation for changes
in overall engine condition and operating environment, so it will be able to maintain the ideal airfuel ratioDuring certain
operating periods such as cold starts, warm up, acceleration, etc richer airfuel ratio is automatically calculated by the
ECU Initial PrimingStarting Procedure NOTE: The Injection system must be purged of all air prior to the initial start up,
andor any time the system has been disassembledIf the EFI system is completely empty of fuel or has been disassembled and
repaired: 1Cycle the key switch from "OFF" to "ON" times, waiting for approximately seconds at "ON" and seconds at "OFF"
in sequence to allow the fuel pump to cycle and shut down2Once step is completed, turn the key switch to "START" until the
engine starts or seconds has passed3If the engine failed to start, repeat step for more cycles and attempt to start the engineIf