9850064 R03 - 2021 650 / 850 Matryx Trail Performance / Crossover Snowmobile Service Manual
© Copyright Polaris Inc.
1.33
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. The fuel pump may need to be
primed or air purged from fuel system after running out of 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 =
650 Models: 42 to 49 psi (292 to 336 kPa)
850 Models: 57 to 62.5 psi (393 to 431 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: .27 in (.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
The PBR is a smart regulator that is CAN capable. If the PBR /
charging system has an issue it will report a Diagnostic Trouble
Code.