10
10.5
9924871 R03 - 2014 Polaris Sportsman® 570 EFI Service Manual
© Copyright 2013 Polaris Sales Inc.
Electrical Service Notes
Keep the following notes in mind when diagnosing an
electrical problem:
• Refer to wiring diagram for stator and electrical
component resistance specifications.
• When measuring resistance of a component that
has a resistance value under 10 Ohms, remember
to subtract meter lead resistance from the reading.
Connect the leads together and record the
resistance. The resistance of the component is
equal to tested value minus the lead resistance.
• Become familiar with the operation of your meter.
Be sure leads are in the proper jack for the test
being performed (i. e. 10Ajack for current
readings). Refer to the Owner’s manual included
with your meter for more information.
• Voltage, amperage, and resistance values
included in this manual are obtained with a Fluke®
77 Digital Multimeter (PV-43568). This meter is
used for when diagnosing electrical problems.
Readings obtained with other meters may differ.
• Pay attention to the prefix on the multimeter
reading (K, M, etc.) and the position of the decimal
point.
• For resistance readings, isolate the component to
be tested. Disconnect it from the wiring harness or
power supply.
Troubleshooting
No Spark, Weak or Intermittent Spark
• Spark plug gap incorrect
• Fouled spark plug
• Faulty spark plug cap or poor connection to high
tension lead
• Related wiring loose, disconnected, shorted or
corroded
• Engine stop switch or ignition switch faulty
• TRS switch mis-adjusted or faulty
• Wire harness or connections wet, corroded or
broken
• Poor ignition coil ground
• Incorrect wiring after repair (inspect color coding in
connectors, etc.)
• Faulty ignition coil windings (measure resistance
of primary and secondary)
• Sheared flywheel key
• Flywheel Loose or damaged
• Excessive crankshaft runout - should not exceed
.0024”
• Faulty ECU
• Faulty CPS
• Low Battery
EFI Component Testing
All EFI component information and diagnostic testing
procedures are located in Chapter 4.
ELECTRICAL
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