Page 219 - Manual Oficina Polaris RS1 2018 e 2019

FUEL SYSTEM

FUEL PUMP In these situations, the “check engine” light will go on, but
will turn off after 4 cranking revolutions if system function
OPERATION OVERVIEW is OK. Once the engine is running, the fuel pump remains
on.
An electric fuel pump assembly is used to transfer fuel to
the EFI system from inside the fuel tank. This assembly
includes the fuel pump, fuel filters, regulator and fuel FUEL SENDER TEST
gauge sender. The pump is rated for a minimum output
of 25 liters per hour at 58 ± 2 psi (400 ± 14 kPa) and has 1. Remove the fuel pump assembly from the fuel tank.
two non-serviceable fuel filters. Refer to Fuel Pump Replacement procedure.
2. Using an Ohm meter, measure the resistance of the
fuel sender as shown below.

4

POSITION READING

EMPTY position 450 Ω ± 2 Ω
FULL position 100 Ω ± 4.5 Ω
Measure between the
two pins q —

3. Allow the sender float to sit in the EMPTY position
and compare to specification.
4. Slowly move the sender float to the FULL position
and compare to specification.
5. If the readings are out of specification, or if the
reading is erratic or LCD display “sticks”, check the
q Fuel Line Connection r Pump / Sending Unit following before replacing the fuel pump assembly:
Electrical Connection • Loose float
• Float contact with tank
w Fuel Pump t Regulator • Bent float rod
6. If none of the conditions exist, the fuel sender
e Fuel Pick-up Filter assembly is faulty. Replace the fuel pump assembly.
Refer to Fuel Pump Replacement procedure.
When the key switch is turned to "ON", the ECU
activates the fuel pump, which pressurizes the system for FUEL PUMP TEST
start-up.
If a fuel delivery problem is suspected, make certain the
The ECU switches off the pump preventing the continued fuel pump filters are not plugged, that the pump is being
delivery of fuel in these instances: activated through the ECU, all electrical connections are
properly secured, the fuses are good, and a minimum of
• If the key switch is not promptly turned to the "start" 7.0 volts is being supplied. If during starting the battery
position. voltage drops below 7.0 volts, the ECU will fail to operate
• If the engine fails to start. the system.
• If the engine is stopped with the key switch "on" (as in
the case of an accident).

9928689 - 2018 RZR RS1 Service Manual 4.33
© Copyright Polaris Industries Inc.