Fuel Pump Operation Overview; Fuel Pressure Test - Polaris RZR XP Turbo Service Manual

13. Connect the fuel supply line
the fuel pump.
14. Install the battery into the vehicle. Torque fasteners to
specification.
TORQUE
Battery Bracket Fastener:
24 in-lbs (3 Nm)
Battery Terminal Fasteners:
60 in-lbs (7 Nm)
15. Install the seats.

FUEL PUMP OPERATION OVERVIEW

When the key switch is turned to "ON", the ECU
activates the fuel pump, which pressurizes the system for
start-up.
The ECU switches off the pump preventing the continued
delivery of fuel in these instances:
• If the key switch is not promptly turned to the "start"
position.
• If the engine fails to start.
• If the engine is stopped with the key switch "on" (as in
the case of an accident).
In these situations, the "check engine" light will go on, but
will turn off after 4 cranking revolutions if system function
is OK. Once the engine is running, the fuel pump remains
on.
As boost pressure increases, fuel pressure increases
due to the manifold pressure controlled fuel regulator. It
is NORMAL to see fuel pressure fluctuations as the
throttle varies.
9928491 R04 - 2017-2018 RZR XP Turbo / XP4 Turbo Service Manual
© Copyright Polaris Industries Inc.
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FUEL PRESSURE TEST

and return line to
due to the manifold pressure controlled fuel regulator. It
If a fuel delivery problem is suspected, make certain the
fuel pump pickup filter in the tank is not plugged, that the
fuel pump relay is being activated by the ECU, all
electrical connections are properly secured, the fuses
are good, and a minimum of 7.0 volts is being supplied. If
during starting the battery voltage drops below 7.0 volts,
the ECU will fail to operate the system.
1. Remove the passenger seat from the vehicle.
2. Cover the fuel supply line connection at the fuel tank
IMPORTANT
As boost pressure increases, fuel pressure increases
is NORMAL to see fuel pressure fluctuations as the
throttle varies.
WARNING
Fuel is extremely flammable and may cause severe
burns, injury, or death.
Do not use any device that produces a flame or
electrical devices that may spark around fuel or fuel
vapors.
with a shop towel and disconnect the supply line
from the fuel pump outlet.
EFI / FUEL SYSTEM
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