5.4
9850043 R01 - 2017-2021 RANGER 500 / 570 Service Manual
© Copyright Polaris Inc.
PRINCIPAL COMPONENTS
The Electronic Fuel Injection (EFI) system is a complete
engine fuel and ignition management design. This
system includes the following principal components:
• Fuel Pump
• Fuel Rail
• Fuel Line
• Fuel Filter(s)
• Fuel Injector
• Pressure Regulator
• Throttle Body / lntake Manifold
• Engine Control Unit (ECU)
• Ignition Coil
• Engine Coolant Temperature Sensor (ECT)
• Throttle Position Sensor (TPS)
• Pedal Position Sensor (PPS)
• Crankshaft Position Sensor (CPS)
• Temperature and Manifold Absolute Pressure Sensor
(T-MAP)
• Electronic Throttle Control (ETC)
• Wire Harness Assembly
• Check Engine Light
INITIAL PRIMING / STARTING
PROCEDURE
NOTICE
The injection system must be purged of all air prior to
the initial start up, and / or any time the system has
been disassembled.
If the EFI system is completely empty of fuel or has been
disassembled and repaired:
1. Cycle the key switch from “OFF” to “ON” 6 times,
waiting for approximately 3 seconds at each “ON”
cycle to allow the fuel pump to cycle and shut down.
2. Once step 1 is completed, turn the key switch to
“START” until the engine starts or 5 seconds has
passed.
3. If the engine failed to start, repeat step 1 for 2 more
cycles and attempt to start the engine.
If the engine fails to start, a problem may still exist,
and should be diagnosed.
NOTICE
Accurate testing of EFI components is recommended
utilizing the Digital Wrench® Diagnostic Software
(dealer only).
FUEL SYSTEM
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