Individual Efi Components - Arctic Cat 2014 SNO PRO 500 Operator's Manual

NOTE: When installing the exhaust manifold
springs, the long hook portion of the spring must
be attached to the exhaust manifold or premature
spring failure will result.
21. With the front of the snowmobile elevated, add
coolant until coolant is visible at the filler neck.
Start the engine and run the engine up to operating
temperature and inspect for any signs of coolant or
gas leaks; then turn the engine off and add coolant
if necessary.
22. Test drive or run the snowmobile and recheck the
coolant level after 5-6 minutes. Verify the tighten-
ing torque of the drive clutch cap screw.
CAUTION
If the engine had a major overhaul or if any major com-
ponent was replaced, proper engine break-in proce-
dures must be followed. If the proper engine break-in
procedures are not followed, severe engine damage
may result.

INDIVIDUAL EFI COMPONENTS

NOTE: With the Arctic Cat EFI System, the ECM
must receive the proper current output from four
coils (two charge coils, an injector coil, and a fuel
pump coil) to function as designed. If a problem
exists, these coils should be checked using the
following procedures.
NOTE: To aid in testing the EFI system, refer to
the EFI Analyzer Usage Manual with EFI Analyzer.
Injector Coil Resistance Test
The injector coil located on the stator powers the two
injectors.
1. Disconnect the double-wire plug with two blue/
white leads from the stator to the ECM.
2. Set the meter selector to the OHMS scale.
3. Connect a meter lead to each of the blue/white
leads. The meter must show 15.2-22.8 ohms.
NOTE: If reading is not within the specification,
recheck to confirm test results. If still out of toler-
ance, replace the stator.
NOTE: If the resistance test is good, a peak read-
ing voltage test should also be made.
Fuel Pump Coil Resistance Test
The fuel pump coil powers the fuel pump through the
ECM.
NOTE: With the engine running, there should
12.3-12.9 DC volts supplied to the fuel pump for
operation. To test fuel pump coil resistance, use
the following procedure.
1. Disconnect the double-plug with the two orange
wires from the ECM.
2. Set the meter selector to the OHMS scale. Connect
a meter lead to each of the two orange leads.
3. The meter must show 1.52-2.28 ohms.
NOTE: If reading is out of tolerance, recheck to
confirm reading. If still out of tolerance, replace
the stator.
NOTE: If the resistance test is good, a peak read-
ing voltage test should also be made.
Lighting Coil Resistance Test
The lighting coil located on the stator provides AC
power to the lighting system and accessories through
the regulator/rectifier. To test the lighting coil resis-
tance, follow this procedure.
1. Disconnect the 3-wire connector at the engine.
2. Set the meter selector to the OHMS scale.
3. Test between the two yellow leads.
4. The meter must show 0.08-0.12 ohm.
NOTE: If reading is out of tolerance, recheck to
confirm reading. If still out of tolerance, replace
the stator.
Removing ECM
1. Disconnect the wiring harness lead from the ECM.
2. Remove the two lock nuts and screws securing the
ECM to the upper spar.
3. Remove the ECM.
Installing ECM
1. Secure the ECM to the upper spar with the screws
and lock nuts.
2. Connect the wiring harness to the ECM.
NOTE: Make sure all connectors are clean and
tight.
Throttle Position Sensor
If the snowmobile is under warranty, the throttle posi-
tion sensor on the EFI system is not a serviceable part.
If the sensor should malfunction, the complete throttle
body assembly must be replaced.
NOTE: If the snowmobile is in warranty, breaking
the seal on the idle screw jam nut or the Phillips-
head screws on the TPS will void warranty.
NOTE: A throttle body assembly with the same
symbol marking on the injectors as the ones being
replaced must be ordered. The symbol is located
on the side of the injector top.
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