4.32
ELECTRONIC FUEL INJECTION
9923523 - 2012 RANGER RZR 570 Service Manual
© Copyright 2011 Polaris Sales Inc.
ECT Sensor Replacement
1. Remove the cargo box access panel.
2. Loosen the hose clamp that a
ttaches the PVT outlet
duct.
3. Remove the driver and passenger seats.
4. Remove the re ar service pa nel to access the ECT
se
nsor.
5. Remove the PVT outlet hose.
6. Drain coolant to level below sensor.
7. Disconnect sensor from engine harness.
8. Using a wrench, re move a nd r eplace th e sensor ,
a
pplying a ligh t coatin g o f thread seala nt to aid
installation.
9. Torque the sensor to 17
ft. lbs. (23 Nm).
10. Add the r equired amount of coo lant and p roperly
ble
ed the cooling system (see Chapter 3).
IGNITION COIL
Operation Overview
The ignition coil is used to provide high voltage to fire the
spark plug. When th e ign ition key is on , DC volt age is
present in primary side of the ignition coil windings. During
engine r otation, an AC pulse is created within th e
crankshaft position sensor for each passing tooth on the
flywheel. The two -tooth gap creates an “interrupt” in put
signal, corresponding to specific crankshaft position. This
signal serves as a r eference for th e co ntrol of ignition
timing. The ECU then calculates the time interval between
the consecutive pulses, and determines when to trig ger
the voltage spike that induces the voltage from the primary
to the secondary coil windings to fire the spark plug.
ECT Torque:
17 ft. lbs. (23 Nm)
Ignition Coil
Outer PVT Cover
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