Fuel Pump; Operation Overview; Fuel Pump Test - Polaris Sportsman 800 EFI 4x4 2012 Service Manual

FUEL SYSTEM - GENERAL

FUEL PUMP

Operation Overview

NOTE: All EFI units utilize quick connect lines.
An electric fuel pump assembly is used to transfer fuel to
the EFI system from inside the fuel tank. This assembly
includes the fuel pump, regulator and fuel gauge sender.
The pump is rated for a minimum output of 25 liters per
hour at 39 psi and has a non-serviceable internal 30-
micron filter.
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, or
• 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.
4.14

Fuel Pump Test

NOTE: FUEL GAUGE SENDER TEST - To test fuel
gauge sender function, refer to Chapter 10.
The fuel pump/tank assembly is serviceable. If a fuel
delivery problem is suspected, make certain the filter is
not plugged, that the pump is being activated through 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.
Check the fuel test valve for any possible fuel seepage
after performing any tests or procedures. 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
1. Remove the fuel rail end cap (damper).
2. Connect the fuel rail end cap (damper) onto adapter
PU-47476 and install on the fuel rail.
3. Attach Polaris pressure tester PU-43506. Route the
tester clear hose into a portable gasoline container
or the equipment fuel tank.
9924864 - 2012-2014 SPORTSMAN 800 / 6X6
© Copyright 2013 Polaris Sales Inc.
WARNING
or fuel vapors.
Normal Fuel Pressure: 39 psi. ± 3