4.20
ELECTRONIC FUEL INJECTION
9924125 - 2013 RANGER RZR / RZR S / RZR 4 Service Manual
© Copyright 2012 Polaris Sales Inc.
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 45 +/- 2 psi and has two non-
serviceable fuel filters.
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
deliver
y of fuel in these instances:
• If the key switch is not promptly turned to the
"st
art" 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 turn on,
but
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
m
easure the resistance. If out of specification, replace the
fuel pump assembly.
Located in Fuel Tank
Fuel Pump
Regulator
Pump / Sending Unit
Preliminary Filter
Fuel Line
Connection
Electrical Connection
Fuel Sender Resistance Specifications:
Full: 6 ± 1
Empty: 90 ± 4.5
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