104
Electrical Systems
All tests of the electrical components should be made
using the digital Fluke Model 77 Multimeter. Replace
any component that does not have a test value within
specifications.
NOTE: Whenever using a digital-style tester, “open
(infinite resistance)” denotes an overload and the
meter reading will be OL since the meter is not cali-
brated to register resistance values of that magnitude.
NOTE: Always check the appropriate fuse before
testing a component for failure.
NOTE: Whenever a part is worn excessively, cracked,
or damaged in any way, replacement is necessary.
SPECIAL TOOLS
A number of special tools must be available to the techni-
cian when servicing the electrical systems.
NOTE: Special tools are available from the Arctic
Cat Service Parts Department.
Ignition System
NOTE: There must be 0.030-0.060 in. free-play
between the throttle lever and the control housing.
741-518B
TROUBLESHOOTING
1. Remove the spark plugs and visually check their
condition. Replace any fouled plug. Attach the spark
plugs to the high tension leads and ground them to
the engine.
NOTE: Make sure the ignition switch and the emer-
gency stop switch are in the ON position.
2. Crank the engine over and check for spark. If no
spark is present, check to make sure the throttle cable
is properly tensioned. Compress the throttle control
and while holding the throttle control in this position,
crank the engine over and check for spark. If spark is
now present, adjust the throttle cable tension.
TESTING
Throttle Control Switch
1. Disconnect the handlebar harness connector; then
connect the ohmmeter leads as shown below.
2. With the throttle lever in the idle position, the meter
must read less than 1 ohm. If the meter reads OL
(infinite resistance), replace the control assembly.
3. Move the throttle lever to the wide open position. The
meter must read OL (infinite resistance). If the meter
reads less than 1000 ohms, replace the control assembly.
4. Connect the ohmmeter leads as shown below.
5. With the emergency stop switch in the off position,
the meter must read less than 1 ohm. If the meter
reads OL (infinite resistance), replace the control
assembly. With the emergency stop switch in the
(RUN) position, the meter must read OL (infinite
resistance). If the meter reads less than 1000 ohms,
replace the control assembly.
Throttle Position Sensor
NOTE: Two-stroke engines equipped with a throttle
position sensor have a protective feature called “fail-
safe” ignition timing preventing engine damage
should the TPS fail. If the TPS does fail, the engine
may run normally at low RPM but will run poorly at
high RPM allowing the operator to get the snowmo-
bile to safety with no engine damage. The engine will
continue to operate this way until the TPS is adjusted
or replaced.
Description
p/n
CATT II Tool
0544-023
Arctic Cat Diagnostic System Manual
2256-974
Laptop Diagnostic Tool
0744-048
Actuator Test Harness
0644-518
Fluke Model 77 Multimeter
0644-559
MaxiClips
0744-041
Throttle Position Sensor (TPS) Adjustment Tool Kit
3639-891
CAUTION
Before checking for spark, place all the engine switches
in the deactivated position. In the event the engine
could be flooded, engage the starter several times to
clear the engine of excess fuel.
CAUTION
Never crank the engine over without grounding the
spark plugs. Damage to coils and/or CDI/ECM may
result.
Wire
Wire
Black/White
Black/Blue
Wire
Wire
Black/Blue
Violet/Red
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