Page 286 - Manual_Polaris_RZR_ProXP-20-21

EFI / FUEL SYSTEM

4. Install the Fuel Pressure Gauge Adapter in-line 7. If the pump did not activate , disconnect the harness
between the fuel pump outlet and fuel supply line. 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,
Fuel Pressure Gauge Adapter:
replace the fuel pump assembly.
PA-48838
5. Connect the hose from the Fuel Pressure Gauge Kit 9. If voltage at the plug was within the specified range,
to the test valve on the Fuel Pressure Gauge Adapter. and there was continuity across the pump terminals,
Route clear hose into a portable gasoline container or reconnect the plug to the fuel pump, making sure you
the vehicle’s fuel tank. have a clean connection. Turn on the key switch and
listen for the pump to activate.
Fuel Pressure Gauge Kit:
PU-43506-A NOTICE
If the pump starts, repeat steps 3, 4 and 5 to verify
6. Turn on key switch to activate the pump and check correct pressure.
the system pressure on the gauge. If proper system
pressure is observed, the ignition switch, ECU, fuel 10.If the pump still does not operate, check for correct
pump, and pressure regulator are working properly. ECU operation by plugging in a known-good ECU of
Turn the key switch off and depress the valve button the same model.
on the tester to relieve the system pressure.
11. If the pump still does not operate, replace the fuel
Fuel Pressure (key on, engine off): pump.
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 9930583 R01 - 2020-2021 RZR PRO XP / XP 4 Service Manual
© Copyright Polaris Industries Inc.