4.19
ELECTRONIC FUEL INJECTION
4
9923523 - 2012 RANGER RZR 570 Service Manual
© Copyright 2011 Polaris Sales Inc.
The ECU switches off the pump preventing the continued
delivery of fuel in these instances:
• If the key switch is not pr
omptly turned to the
"start" position.
• If the engine fails to start.
• If the engine is stopped with the key switch "on"
(as in the case of an a
ccident).
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, o r if the displ ay re ading differs in lar ge
comparison to the fuel in the tank, perform a resistance
test on the fuel sender.
Disconnect the fuel pump / se
nding unit connection and
measure the resistance. If out of specification, replace the
fuel pump assembly.
Fuel Pump Test
If a fuel delivery problem is suspected, make certain the
fuel pump filters are not plugged, that the pump is being
activated through the ECU, all electrical connections are
properly secured, the fuses are good, and a minimum of
7.0 volts is being supplied. If d uring starting the ba ttery
voltage drops below 7.0 volts, the ECU will fail to operate
the system.
1. Remove the passenger seat from the vehicle.
2. Cover the fuel line connection at the fuel tank with a
sh
op towel and disconnect the line from the fuel pump
outlet.
3. Install the Fuel Pressure Gauge Adaptor (PV-48656)
i
n-line between the fuel pump outlet and fuel line.
4. Connect the hose from the Fuel Pressure Gauge Kit
(
PU-43506-A) to the test valve on the Fuel Pressure
Gauge Adaptor (PV-48656). Route the clear hose into
a portable ga soline container or the ve hicle’s fu el
tank.
Fuel Sender Resistance Specifications:
Full: 6 ± 1 Ohms
Empty: 90 ± 4.5 Ohms
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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