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9929375 R02 - 2016-2019
GENERAL
/
GENERAL 4
Service Manual
© Copyright Polaris Industries Inc.
4.33
FUEL PUMP SERVICE
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 filter, regulator and fuel level
sender. The pump is rated for a minimum output of
9.25
gal (35 L)/hr
at
58 ± 2 psi (400 ± 14 kPa)
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
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
illuminate, but turn off after 4 cranking revolutions if the
system functions properly. Once the engine is running,
the fuel pump remains on to maintain fuel pressure.
FUEL SENDER TEST
1. Remove the fuel pump assembly from the fuel tank.
Refer to
Fuel Pump Replacement
procedure.
2. Using an Ohm meter, measure the resistance of the
fuel sender as shown below.
#
POSITION
READING
q
EMPTY position
450 Ω ± 5%
w
FULL position
100 Ω ± 3%
e
Measure between
the two pins
—
3. Allow the sender float to sit in the
EMPTY position
and compare to specification.
4. Slowly move the sender float to the
FULL position
and compare to specification.
5. If the readings are out of specification, or if the
reading is erratic or LCD display “sticks”, check the
following before replacing the fuel pump assembly:
• Loose float
• Float contact with tank
• Bent float rod
6. If none of the conditions exist, the fuel sender
assembly is faulty. Replace the fuel pump assembly.
Refer to
Fuel Pump Replacement
procedure.
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
10.0 volts is being supplied. If during starting the battery
voltage drops below 10.0 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.
2. Cover the fuel line connection at the fuel tank with a
shop towel and disconnect the line from the fuel
pump outlet
3. Install the Fuel Pressure Gauge Adapter (
PA-48838
)
in-line between the fuel pump outlet and fuel line.
4. Connect the hose from the Fuel Pressure Gauge Kit
(
PU-43506-A
) to the test valve on the Fuel Pressure
Gauge Adapter (
PA-48838
). Route clear hose into a
portable gasoline container or the vehicle’s fuel tank.
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