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Snowmobile Ski Doo REV SERIES (2006 year). Instruction - part 71

Section 07 ELECTRICAL SYSTEM

Subsection 01 (IGNITION SYSTEM)

ENGINE CUT-OUT SWITCH

TEST

Open circuit

Continuity

TEST

PROBES

BLACK/YELLOW and

BLACK wires

BLACK/YELLOW and

BLACK wires

RESISTANCE

O.L.

00.0 to 00.5

VOLTAGE

—

NOTE

Engine cut-out switch must

be in RUN position.

Engine cut-out switch must

be in STOP position.

Ignition Coil

Disconnect housing between the magneto and
the MPEM.

Compare readings with those appearing in the IG-
NITION COIL table.

During voltage testing, when manually starting the
engine while the spark plug is installed, the engine
will tend to accelerate beyond the compression
point. This will result in higher magneto output.
Always repeat the procedure 3 times.

IGNITION COIL

LIQUID-COOLED ENGINES

TEST

Primary

winding

resistance

Secondary

winding

voltage

Secondary

winding

resistance

spark plug

wires and

cap included

Secondary

winding

resistance

spark plug

wires

removed

TEST

PROBES

WHITE/BLUE

and BLACK

wires

On spark

plug wire

insulation

and on

engine

Between

both spark

plug caps

Male

terminals

of coil

RESISTANCE

00.2 to 0.5

—

14.5 k

23.5 k

9.6 k

14.4 k

VOLTAGE

—

1.5 to 2.5 Vdc

—

NOTE

Disconnect

the ignition

coil from the

MPEM

Do not probe

into spark

plug cap

with spark

plug wire

removed

from spark

plug.

Do not

attempt

to remove

spark plug

caps from

the wires.

With spark

plug wires

removed

from high

voltage

coil.

IGNITION COIL

FAN-COOLED ENGINES

TEST

Output

Ground

continuity

Secondary

winding

voltage

Cable

resistance

TEST

PROBES

RED and

BLACK

wires

BLACK wire

and engine

wires

BLACK wire

and engine

Spark plug

cable and cap

RESISTANCE

4.5 to 6.5

00.0 to 00.5

—

4.0 k

6.0 k

VOLTAGE

7.0 to 15.0

Vac

—

.100 to .250

Vac

—

NOTE

—

Engine

refers to

the engine

metal parts

connected

to the

magneto

housing.

The

measurement

must be

taken on

the spark

plug cable

(without the

spark plug).

—

Trigger Coil

NOTE: For SDI engine, refer to ENGINE MAN-
AGEMENT.

Check the resistance and the voltage for each trig-
ger coil.

TRIGGER COIL

LIQUID-COOLED ENGINES

TEST

Continuity

Output

Trigger coil

TEST

PROBES

BLUE/

YELLOW

and WHITE/

YELLOW

wires

GREEN/

YELLOW

and GRAY/

YELLOW

wires

BLUE/

YELLOW

and WHITE/

YELLOW

wires

GREEN/

YELLOW

and GRAY/

YELLOW

wires

RESISTANCE

190 to 300

—

VOLTAGE

—

.200 to .350

Vdc

.200 to .350

Vdc

NOTE

—

While

cranking

engine.

While

cranking

engine.

mmr2005-082

281

Section 07 ELECTRICAL SYSTEM
Subsection 01 (IGNITION SYSTEM)

TRIGGER COIL

FAN-COOLED ENGINES

TEST

Continuity

Output

Trigger coil

TEST

PROBES

BLUE/YELLOW and

WHITE/YELLOW wires

BLUE/YELLOW and

WHITE/YELLOW wires

RESISTANCE

160 to 180

—

VOLTAGE

—

.150 to .350

Vac

.150 to .350

Vac

NOTE

—

If a trigger coil is out of specification, replace it.

MPEM

NOTE: For SDI and Power Tek engines, refer
to ENGINE MANAGEMENT for more information
concerning the Engine Control Module (ECM).

When other components have been tested above
and are good, the electronic module can be sus-
pected. Ensure wiring and connectors are in good
condition and perform the following tests prior to
replacing the electronic module.

Disconnect the connector housing between mod-
ule and high voltage coil.

A32E3QA

1. Trigger coil
2. Cooling temperature sensor
3. High tension coil
4. DESS, ignition and engine cut-out switches, DESS pilot lamp

Install probes on wires in accordance with the fol-
lowing table.

Activate the manual starter and check values indi-
cated by the multimeter.

Repeat test 3 times.

MPEM ON VEHICLE WITH MANUAL STARTER

TEST

Ground

connection

Power from

regulator

Voltage to ignition

coil

TEST

PROBES

BLACK wire and

negative battery

terminal or frame

RED/BLUE and

BLACK wires

WHITE/BLUE and

BLACK wires

RESISTANCE

00.0 to 00.5

—

VOLTAGE

—

3 to 5 Vdc

225.0 to 275.0 Vdc

NOTE

—

While cranking

engine

With tether cap in

place and engine

cut-out switch

in run position.

While cranking

engine.

MPEM ON VEHICLE WITH ELECTRIC STARTER

TEST

Ground

connection

Power from

battery

Power from

regulator

Voltage to

ignition coil

TEST

PROBES

BLACK and

negative

battery

terminal or

frame

RED/GREY

and BLACK

RED/BROWN

and BLACK

WHITE/BLUE

and BLACK

RESISTANCE

00.0 to 00.5

—

VOLTAGE

—

Same as

battery

voltage

3 to 5 Vdc

225.0 to

275.0 Vdc

NOTE

—

Voltage

always

present.

While

cranking

engine.

With tether

cap in place

and engine

cut-out

switch in

run position.

While

cranking

engine.

Relay

Refer to ACCESSORIES or ENGINE MANAGE-
MENT (Power Tek and SDI engines).

Beeper

Refer to ACCESSORIES.

IGNITION TIMING

Fan-Cooled Engines

If for any reason, ignition timing accuracy is sus-
pected, it can be verified as follows.

282

mmr2005-082

Section 07 ELECTRICAL SYSTEM

Subsection 01 (IGNITION SYSTEM)

Verifying Magneto Flywheel Timing
Mark Position

Prior to checking the timing, it may be necessary
to verify the position of the timing mark on the
magneto flywheel, for the following reasons:

• To detect a missing or broken magneto flywheel

Woodruff key which would allow a change of
timing to occur, with eventual breakdown of the
engine.

• To correctly locate and mark a timing mark on a

new service magneto flywheel.

• To verify the correct location of the factory tim-

ing mark.

• To detect a wrong magneto flywheel corre-

sponding to a different engine type.

To verify the position of the timing mark on the
magneto flywheel, proceed as follows:

• Clean the area around the spark plugs, and re-

move them.

• Remove the rewind starter from the engine.
• Install the TDC gauge in the spark plug hole,

(magneto/generator side) and adjust as follows:
– Position the magneto flywheel at approxi-

mately TDC.

A17E0YA

TYPICAL — INSTALLATION OF TDC GAUGE
1. Adaptor lock nut
2. Gauge on MAG side cylinder

– Assemble the gauge to the adaptor and tight-

en the roller lock nut. Do not tighten the
adaptor lock nut.

– Screw the adaptor into the spark plug hole

and tighten to prevent movement in the plug
hole.

– Position the dial face toward the magne-

to/generator. Move the gauge down until
the needle just begins to move, then move
down a further 5 or 6 mm (approximately 1/4
in). Tighten adaptor lock nut by hand.

• Locate the piston TDC position as follows:

– Slowly rotate the magneto flywheel back and

forth across TDC while observing the needle.
Note that the needle stops moving only as
the piston is changing direction.

– Rotate the dial face so that «0» is in line with

the needle when it stops moving.

– Again, slowly rotate the magneto flywheel

back and forth across TDC and adjust the dial
face to «0», until the needle always stops
exactly at «0» before changing direction.

– «0» now indicates exact TDC.

• Verify the position of the timing mark on the

magneto flywheel as follows:

NOTE: When checking timing, certain procedures
require that the magneto flywheel be turned in
a clockwise direction, viewed facing the magne-
to/generator. If it is necessary to turn back (coun-
terclockwise) for any reason, rotate the magne-
to flywheel at least one-quarter turn counterclock-
wise, and then rotate it clockwise. The last mag-
neto flywheel movement when making a critical
check must always be in a clockwise direction, to
ensure that the slack in engine moving parts is tak-
en-up.

– Rotate the magneto flywheel counterclock-

wise, one-quarter turn then carefully rotate
it clockwise until the needle indicates the
specified measurement. Refer to TECHNI-
CAL DATA.

– Verify that the magneto flywheel mark per-

fectly aligns with the mark on the trigger coil,
refer to illustration.

– If the marks do not align, check magneto

flywheel and trigger coil part numbers and
check Woodruff key condition. If all parts are
the appropriate ones and if Woodruff key is in
good condition, continue the procedure.

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283

Section 07 ELECTRICAL SYSTEM
Subsection 01 (IGNITION SYSTEM)

A17E10A

TYPICAL
1. Trigger coil mark
2. Magneto flywheel mark

NOTE: These marks cannot be used to check dy-
namic (with engine running) ignition timing with a
timing light: a new mark must be scribed on mag-
neto flywheel for this purpose.

• Scribe a new mark on magneto flywheel as fol-

lows.
– Remove the fan cover from the engine.
– Maintain magneto flywheel so that previous

marks remain aligned.

– Scribe or punch a mark on magneto flywheel

so that it perfectly aligns with the arrow on
crankcase, refer to illustration. This new tim-
ing mark should be used for future timing
checks (dynamic timing).

– Reinstall rewind starter.
– Check the timing with a timing light.

A17E0ZA

TYPICAL
1. Crankcase arrow
2. Scribe a mark here
3. Maintain verified timing marks aligned (static timing)

Checking Ignition Timing

Use a timing light and the digital/inductive type
tachometer (P/N 529 014 500).

F01B1GA

TACHOMETER

To check the ignition timing, refer to illustration
and proceed as follows:

• Place ski tips against a wall, raise rear of vehicle

on a stand, so that track does not contact the
ground.

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mmr2005-082

Content .. 69 70 71 72 ..