Polaris RZR PRO XP 2020 Service Manual page 286

EFI / FUEL SYSTEM
4. Install the Fuel Pressure Gauge Adapter in-line
between the fuel pump outlet and fuel supply line.
Fuel Pressure Gauge Adapter:
PA-48838
5. 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
6. 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):
75 ± 2 psi (520 ± 14 kPa)
NOTICE
If the fuel pressure is out of specification, verify voltage
to the fuel pump and replace the fuel pump assembly if
battery voltage is observed.
As boost pressure increases, fuel pressure increases
due to the manifold pressure controlled fuel regulator. It
is NORMAL to see fuel pressure fluctuations as the
throttle varies. Pressure may briefly drop below 58 PSI
(400 kPa) when the throttle is released on a running
vehicle.
5.26
7. 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.
8. 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.
9. 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.
10. If the pump still does not operate, check for correct
ECU operation by plugging in a known-good ECU of
the same model.
11. If the pump still does not operate, replace the fuel
pump.
9850068 R01 - 2020-2021 RZR PRO XP / XP 4 Service Manual
© Copyright Polaris Industries Inc.