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4.3
9924871 R03 - 2014 Polaris Sportsman® 570 EFI Service Manual
© Copyright 2013 Polaris Sales Inc.
GENERAL INFORMATION
WARNING
* Gasoline is extremely flammable and explosive under
certain conditions.
* EFI components are under high pressure. Verify
system pressure has been relieved before disassembly.
* Never drain the fuel system when the engine is hot.
Severe burns may result.
* Do not overfill the tank. The tank is at full capacity
when the fuel reaches the bottom of the filler neck.
Leave room for expansion of fuel.
* Never start the engine or let it run in an enclosed area.
Gasoline powered engine exhaust fumes are poisonous
and can cause loss of consciousness and death in a
short time.
* Do not smoke or allow open flames or sparks in or
near the area where refueling is performed or where
gasoline is stored.
* If you get gasoline in your eyes or if you should
swallow gasoline, seek medical attention immediately.
* If you spill gasoline on your skin or clothing,
immediately wash with soap and water and change
clothing.
* Always stop the engine and refuel outdoors or in a
well ventilated area.
Service Notes
• For more convenient and accurate testing of EFI
components, it is recommended dealers utilize the
Digital Wrench Diagnostic Software (dealer only),
or testing may be done manually using the
procedures provided.
• For the purpose of troubleshooting difficult running
issues,
a
known-good
ECU
from
another
Sportsman 570 of the same model and year may
be used without damaging system or engine
components.
• Never
attempt
to
service
any
fuel
system
component while engine is running or ignition
switch is "on."
• Cleanliness is essential and must be maintained at
all times when servicing or working on the EFI
system. Dirt, even in small quantities, can cause
significant problems.
• Do not use compressed air if the system is open.
Cover any parts removed and wrap any open
joints with plastic if they will remain open for any
length of time. New parts should be removed from
their protective packaging just prior to installation.
• Clean any connector before opening to prevent dirt
from entering the system.
• Although every precaution has been taken to
prevent water intrusion failure, avoid direct water
or spray contact with system components.
• Do not disconnect or reconnect the wiring harness
connector to the control unit or any individual
components with the ignition "on." This can send a
damaging voltage spike through the ECU.
• Do not allow the battery cables to touch opposing
terminals. When connecting battery cables attach
the positive (red) cable to positive (+) battery
terminal first, followed by negative (black) cable to
negative (-) battery terminal.
• Never start the engine when the cables are loose
or poorly connected to the battery terminals.
• Never disconnect battery while engine is running.
• Never use a battery boost-pack to start the engine.
• Do not charge battery with key switch "on."
• Always disconnect negative (-) battery cable lead
before charging battery.
• Always unplug ECU from the wire harness before
performing any welding on the unit.
FUEL SYSTEM - GENERAL
