Fuel Pump; Operation Overview; Fuel Sender Test; Fuel Pump Test - Polaris RZR 900 2015 Service Manual

FUEL SYSTEM

FUEL PUMP

OPERATION OVERVIEW

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, fuel filters, regulator and fuel
gauge sender. The pump is rated for a minimum output
of 25 liters per hour at 58 ± 2 psi (400 ± 14 kPa) and has
two non-serviceable fuel filters.
q
Fuel Line Connection
w
Fuel Pump
e
Fuel Pick-up 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.
• If the engine is stopped with the key switch "on" (as in
the case of an accident).
9926814 R08 -
4.16
r
Pump / Sending Unit
Electrical Connection
t
Regulator
2015-2016 RZR 900
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.

FUEL SENDER TEST

If the fuel gauge reading on the instrument cluster is not
working, or if the display reading differs in large
comparison to the fuel in the tank, perform a resistance
test on the fuel sender.
Disconnect the fuel pump / sending unit connection and
measure the resistance between sender pins
specification, replace the fuel pump assembly.
Fuel Sender Resistance Specifications:
w w
Full
Empty

FUEL PUMP TEST

If a fuel delivery problem is suspected, make certain the
fuel pump filters are 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.
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.
1. Remove the passenger seat from the vehicle.
q
. If out of
: 100 ± 3 Ω
e e
: 450 ± 5 Ω
2016 RZR S 1000 Service
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