Page 285 - Manual_Polaris_RZR_ProXP-20-21

EFI / FUEL SYSTEM

FUEL PUMP OPERATION OVERVIEW FUEL PRESSURE TEST
When the key switch is turned to "ON", the ECU NOTICE
activates the fuel pump, which pressurizes the system for
start-up. This test applies to non-EVAP models only.
The ECU switches off the pump preventing the continued
delivery of fuel in these instances: IMPORTANT
As boost pressure increases, fuel pressure increases
• If the key switch is not promptly turned to the "start"
position. due to the manifold pressure controlled fuel regulator. It
is NORMAL to see fuel pressure fluctuations as the
• If the engine fails to start. throttle varies.
• If the engine is stopped with the key switch "on" (as in
the case of an accident). If a fuel delivery problem is suspected, make certain the
fuel pump pickup filter in the tank is not plugged, that the
In these situations, the “check engine” light will go on, but fuel pump relay is being activated by the ECU, all
will turn off after 4 cranking revolutions if system function electrical connections are properly secured, the fuses
is OK. Once the engine is running, the fuel pump remains are good, and a minimum of 7.0 volts is being supplied. If
on. during starting the battery voltage drops below 7.0 volts,
the ECU will fail to operate the system.
As boost pressure increases, fuel pressure increases
due to the manifold pressure controlled fuel regulator. It 5
is NORMAL to see fuel pressure fluctuations as the WARNING
throttle varies. 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.

1. Remove both seats from the vehicle.
2. Remove upper and lower rear close off panels.
3. Cover the fuel supply line connection at the fuel tank
with a shop towel and disconnect the supply line q
from the fuel pump outlet.

9930583 R01 - 2020-2021 RZR PRO XP / XP 4 Service Manual 5.25
© Copyright Polaris Industries Inc.