Polaris 850 PRO-RMK 155 2.6" QD 2021, Manual

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9850060 R02 - 2020-2021 850 AXYS™ Long Track Snowmobile Service Manual
© Copyright Polaris Inc.
DC-CFI AXYS DIAGNOSTICS
TROUBLESHOOTING – ENGINE WILL NOT
START
COMPONENT POSSIBLE PROBLEM SOLUTION
Fuel System
Fuel Quality
Check the quality of fuel in the fuel tank. Use a commercially
available fuel tester to verify ethanol content is ≤ 10%.
Fuel Level Fill the fuel tank with fresh fuel.
Switches
Ignition Switch
Verify the key is in the ON / RUN position. Test the switch
using continuity test tables in the Electrical Chapter.
Auxiliary Shut Off Switch
Verify the switch is pulled up. Test the switch using continuity
test tables in the Electrical Chapter.
Throttle Release Switch (TRS)
Verify the throttle cable freeplay is set to specification. Test
the TRS using test information in the Electrical Chapter.
Fuel Pump
Fuel Pump Wire Harness
Verify the fuel pump wire harness is connected and no wires
are damaged.
Fuel Pump Power
Connect a fully-charged 12V battery to the fuel pump prime
connector. The fuel pump should turn on.
Connect Digital Wrench to the vehicle. Use Output state
control to test the fuel pump function. ECU must command
the fuel pump to turn on when using Output State Control
testing.
Fuel Pressure
Fuel Pressure using a fully-charged 12V battery connected
to fuel pump prime connectors = 58 – 60 psi (400 – 413
kPa).
Fuel Pump Pick-Up Sock
Inspect the fuel pump pick-up sock. Replace the sock if it is
contaminated with foreign material.
Engine
Mechanical
Spark Plug Type
Verify the specified spark plugs are installed and gapped to
specification.
NGK BPR9ES / Gap: .027″ (0.70 mm)
Spark Plug Condition Replace fouled / damaged spark plugs.
Spark Plug Function
Use a commercially available spark plug tester set at the
specified electrode gap.
High Tension Wires / Boots
Inspect high tension wires and boots for damage / stripped
ends.
Cylinder Compression
Test both cylinders under the same conditions using the
same compression tester. Verify the compression difference
between the cylinders is ≤ 15%.
Engine Electrical
Stator
Test stator coil resistance. Reference the Electrical Chapter
for resistance specifications.
Inspect 2 and 5 tooth position sensors.
Flywheel
Inspect the flywheel / magnets for damage. Inspect the
flywheel key.
System Power
Connect a fully-charged 12V battery to the ECU PWR Test
Connector. Connect Digital Wrench to the vehicle. If the
engine starts when the battery is connected, disconnect the
battery and inspect the Fuel Injector Voltage on Digital
Wrench. Voltage must be 15.5 – 16 VDC. If the voltage is
lower, inspect the stator system power coil and ORANGE
wires at the ECU 26 PIN harness connector for damage.
GENERAL INFORMATION