Polaris 2012 RANGER RZR 570, Руководство по обслуживанию, Страница: 160 / 403

4.20
ELECTRONIC FUEL INJECTION
9923523 - 2012
RANGER
RZR 570 Service Manual
© Copyright 2011 Polaris Sales Inc.
5. Turn on the key switch to activate the pump and check
the system pressure on the gauge. If system pressure
of 43 - 48 psi is ob served, the ignition switch, ECU,
fuel pump, an d pr essure regulator are working
properly. Tu rn th e k ey s witch of f an d de press th e
valve bu tton on th e te ster to relieve the system
pressure.
NOTE: If t he f uel p ressure is out o f specification,
replace the fuel pump assembly.
6. If the pump did not activate (Step 5), 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.
NOTE: If t he volt age was be low 7 VDC, t est the
battery, ignition switch, relay(s), wiring harness and
ECU.
7. If th e r eading is between 7 a nd 14 vo lts, tu rn key
switch off an d co nnect an ohmmeter b etween
terminals “3” and “4”' at the white fuel pump connector
to check for continuity within the fuel pump.
NOTE: If there was no continuity between the pump
terminals, replace the fuel pump assembly.
8. 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.
NOTE: If the pump starts, repeat steps 3, 4 and 5 to
verify correct pressure.
9. If the pump still does not operate, check for correc t
ECU operation by plugging in a known-good ECU of
the same model.
NOTE: If the pump still does not operate, replace the
fuel pump assembly.
Normal Fuel Pressure:
43-48 psi (296.5 - 331 KPA)