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9928485 R01 - 2017-2018 RANGER 500 / 570 Service Manual
© Copyright Polaris Industries Inc.
IGNITION COIL OVERVIEW
IGNITION COIL / WIRE OVERVIEW
The ignition coil uses induction to convert high current,
low voltage in the primary ignition coil winding into low
current, high voltage in the secondary ignition coil
winding. The secondary side is the output that goes to
the ignition wire/cable, and then to the spark plug. The
circuit is completed to ground through the cylinder head
and then through engine ground back to the coil. When
the ignition key is on, DC voltage is present in primary
side of the ignition coil windings.
Spark is induced by the ECU opening the ground leg of
the coil circuit. This causes the magnetic field in the
primary to collapse, causing self induction and a great
voltage increase in both the primary and secondary. This
causes voltage to become high enough in the secondary
circuit that it can jump the spark plug gap.
IGNITION COIL / WIRE TEST
The ignition coil can be tested using an digital multimeter.
Use the following specification table and illustrations to
test the ignition coil.
TEST CONNECTION RESISTANCE
Primary Coil Coil Pack + and –
Pins
0.50Ω +/- 10%
Secondary Coil Coil Pack – and
Spark Plug Wire
Terminal
6.6kΩ +/- 10%
Spark Plug Wire Wire Connector
Terminal and
Spark Boot
Terminal
7.0kΩ +/- 10%
COIL PACK CONNECTIONS
SPARK PLUG WIRE CONNECTIONS
FUEL SYSTEM
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