Lighting System Testing Sequence; Sparking; Electrical Connector Testing; Ignition Switch, Tether Cord Switch And Engine Cut-Out Switch Testing - BOMBARDIER ski-doo Tundra Scandic 2004 Series Shop Manual

Section 06 ELECTRICAL
Subsection 06 (TESTING PROCEDURE)
3. Ignition switch, DESS switch or tether cord switch
and engine cut-out switch.
4. Ignition generator coil.
5. Trigger coil.
LIGHTING SYSTEM TESTING
SEQUENCE
1. Electrical connectors.
2. Magneto output (lighting generator coil).
Testing Conditions
Voltage measurements are always taken upon
starting the vehicle. Readings taken when the en-
gine 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 use
enough force upon each trial.
Doing 3 trials, the readings must each time be
within or above the range indicated in the corre-
sponding table. If the reading is too low, the part
is considered to be defective and it must be re-
placed.
Resistance Readings
Place multimeter selector switch to Ω in order to
measure resistance. Readings must be within the
indicated range. Otherwise, the part is considered
to be defective and must be replaced.
CAUTION: When taking measurements, it is use-
less 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 occur-
ring only when the engine operating temperature is
normal must be checked in similar conditions.
In most cases when problems are caused by tem-
perature or vibrations, these can only be solved by
replacing parts. Most problems cannot be detect-
ed when the engine is stopped.
06-06-8
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. 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, TETHER
CORD SWITCH AND ENGINE
CUT-OUT SWITCH TESTING
Disconnect connector housing 2-01 from engine,
and using a multimeter, check resistance as indi-
cated in IGNITION table.
If readings are acceptable, go on to next step.
If readings are inadequate, individually check each
switch as follows.
MMR2004-134_06_06A.FM