Section 07 ELECTRICAL SYSTEM
Subsection 05 (TESTING PROCEDURE)
1 . C H E C K K E Y S
2 . P R O G R A M K E Y
> 3 . V E H I C L E I N F O
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S T A R T V E H .
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After procedure is completed, ensure engine idle
speed with engine hot is 1800 - 2000 RPM.
Stop the engine.
SYSTEM TESTING
Ignition System Testing Sequence
In the case of ignition problems, check the follow-
ing in the prescribed order until the problem can
be solved.
1) Sparking/spark plug condition.
2) Electrical connectors.
3) Ignition switch, DESS switch or tether cut-out
switch and engine cut-out switch.
4) Ignition generator coil.
5) Trigger coil.
6) MPEM voltage (liquid cooled models only).
7) High voltage coil (liquid cooled models only).
8) Buzzer testing.
Lighting System Testing Sequence
1) Electrical connectors.
2) Magneto output (lighting generator coil).
Testing Conditions
Voltage measurements are always taken upon
vehicle starting. Readings when the engine is
running will be higher than indicated range. Part
temperature must be approximately 20 °C (68 °F)
(room temperature), otherwise readings could be
distorted.
Analysis of Readings
• Voltage Readings
When testing the different magneto components,
it is important to take into consideration that read-
ings vary according to the force applied onto the
manual starter. It is therefore important to employ
enough force upon each trial.
The reading must be 3 times within or above the
range indicated in the corresponding table. If the
reading is too low, the part is considered to be
defective and must be replaced.
• Resistance Readings
Place multimeter selector switch to
in order to
measure resistance. Readings must be within the
indicated range. Otherwise, the part is consid-
ered to be defective and must be replaced.
CAUTION: When taking measurements, it is
useless to try to start the vehicle since readings
would then be distorted.
• Intermittent Ignition Problems
It is difficult to make a diagnostic in the case of in-
termittent ignition problems. Thus, problems oc-
curring only when the engine operating tempera-
ture is normal must be checked in similar condi-
tions.
In most cases when problems are caused by tem-
perature or vibrations, these can only be solved
by replacing parts. Most problems cannot be de-
tected when the engine is stopped.
• Multiple Problems
As a matter of fact, more that one component can
be defective. As a result, if the problem remains
although a part was replaced, start over the whole
verification from the beginning in order to identify
the other defective component.
1. Sparking
During this operation, it is important to use the
snowmobile spark plug and not a new one. Bring
the plug in contact with the engine. Pull rewind
starter. If no spark is produced, replace the spark
plug with a new one and do the test again.
2. Electrical Connector Testing
Make sure that none of the connectors are discon-
nected.
3. Ignition Switch, DESS Switch or
Tether Cut-Out Switch and Engine
Cut-Out Switch Testing
Disconnect connector housings and check resis-
tance as indicated in IGNITION table.
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