Fuel Pump; Fuel Sender Test; Fuel Pump Test - Polaris 2008 RZR Service Manual

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, fuel filters, regulator and fuel gauge sender. The pump is
rated for a minimum output of 25 liters per hour at 39 psi and has
two non-serviceable fuel filters.
Fuel Pump Assembly
Located in Fuel Tank
Vent Line
Connection
Pump / Sending Unit
Connection
Regulator
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
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 the Purple and Brown wires (see chapter
10 for further details). If out of specification, replace the fuel
pump assembly.
NOTE: See the "Electronic Parts Catalog" for fuel
pump availability. It may be possible that the fuel
tank assembly must be replaced.

Fuel Pump Test

Fuel Line The fuel pump assembly may be a serviceable item on some
Connection
vehicles.
NOTE: See the "Electronic Parts Catalog" for fuel
pump availability. It may be possible that the fuel
tank assembly must be replaced.
Fine Filter
If a fuel delivery problem is suspected, make certain the fuel
pump filters are not plugged, that the pump is being activated
Fuel Pump
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
Preliminary Filter
volts, the ECU will fail to operate the system.
ELECTRONIC FUEL INJECTION
• If the engine is stopped with the key switch "on" (as in
the case of an accident).
Fuel Sender Resistance Specifications:
Full: 90
Empty: 5
WARNING
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 or fuel vapors.
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