Table of Contents
EFI / FUEL SYSTEM
FUEL PRESSURE TEST
NOTICE
This test applies to non-EVAP models only.
If a fuel delivery problem is suspected, make certain the
fuel pump pickup filter in the tank is not plugged, that the
fuel pump relay is being activated by 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.
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
1. Install the Fuel Pressure Gauge Adapter in-line
between the fuel pump outlet and fuel supply line.
Fuel Pressure Gauge Adapter:
PA-48838
2. Connect the hose from the Fuel Pressure Gauge Kit
to the test valve on the Fuel Pressure Gauge Adapter.
Route clear hose into a portable gasoline container or
the vehicle's fuel tank.
Fuel Pressure Gauge Kit:
PU-43506-A
5.22
WARNING
vapors.
3. Turn on key switch to activate the pump and check
the system pressure on the gauge. If proper system
pressure is observed, the ignition switch, ECU, fuel
pump, and pressure regulator are working properly.
Turn the key switch off and depress the valve button
on the tester to relieve the system pressure.
Fuel Pressure (key on, engine off):
58 ± 2 PSI (399 ± 13.7 kPa)
4. If the pump did not activate , disconnect the harness
connector from the fuel pump. Connect a DC
voltmeter across terminals "3" and "4" in the plug on
the vehicle fuel pump harness. Turn on the key switch
and observe voltage to ensure a minimum of 7 volts is
present.
NOTICE
If the voltage was below 7 VDC, test the battery, ignition
switch, relay(s), wiring harness and ECU.
5. If the reading is between 7 and 14 volts, turn key
switch off and connect an ohmmeter between
terminals "3" and "4"' at the white fuel pump
connector to check for continuity within the fuel pump.
NOTICE
If there was no continuity between the pump terminals,
replace the fuel pump assembly.
6. If voltage at the plug was within the specified range,
and there was continuity across the pump terminals,
reconnect the plug to the fuel pump, making sure you
have a clean connection. Turn on the key switch and
listen for the pump to activate.
NOTICE
If the pump starts, repeat steps 3, 4 and 5 to verify
correct pressure.
7. If the pump still does not operate, check for correct
ECU operation by plugging in a known-good ECU of
the same model.
8. If the pump still does not operate, replace the fuel
pump.
9940259 R02 - 2022 RZR PRO R / PRO R 4 Service Manual
© Copyright Polaris Industries Inc.
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