Ski-Doo Ski Doo MX Z 2005 [1160/1429] Dess switch verification
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Ski-Doo Ski Doo MX Z 2005 [1160/1429] Dess switch verification

Ski-Doo Ski Doo MX Z 2005 [1160/1429] Dess switch verification
Section 05 ENGINE MANAGEMENT (2-TEC)
Subsection 03 (COMPONENT INSPECTION AND ADJUSTMENT)
For primary winding, check the resistance be-
tween terminal 15 and terminal 1a (cylinder 1)
of the ignition coil and between terminal 15 and
terminal 1b (cylinder 2) respectively.
The resistance should be between 0.40 and
1.15
at 20°C(68°F).
If the resistance of one of both windings is not
good, replace the ignition coil.
If the windings test good, check corresponding
fuse, relay and wiring. If good, try a new ECM.
WARNING
Always reconnect ignition coil cables at the
same spark plugs where they come from.
Otherwise, severe backfire may occur with
possible damage to exhaust system compo-
nents.
IGNITION TIMING
Refer to IGNITION TIMING section.
ENGINE START/RER BUTTON
VERIFICATION
A quick operation test can be done using the ve-
hicle communication kit (VCK) with the B.U.D.S.
software, using the Monitoring section. Press
the START/RER button and look at the START/RER
button LED. It should turn on, indicating the start-
ing system is working on the input side of the
starting system (START/RER button, ECM and
wiring). If so, you know now the problem is
on the output side of the starting system (ECM
output signal to starting solenoid, wiring harness
going to the solenoid and starter motor. Other-
wise, check the input side as follows.
Disconnect the connector of the steering harness.
Measure the resistance of the GREEN/RED and
LIGHT BROWN wires for 0
. Depress start but-
ton and the reading should change from 0
to in-
finitely high.
Release the start button and measure the resis-
tor between LIGHT BROWN and BLACK wires. It
should be 50
.
Test continuity of circuit B-19. If it is good, try a
new ECM. Otherwise, repair harness/connectors.
DESS SWITCH VERIFICATION
If 2 short beeps are not heard when starting the
engine, refer to DIAGNOSTIC PROCEDURES.
The following continuity tests can also be per-
formed using an ohmmeter.
Disconnect switch wires.
Tether Cord Cap Removed
Connect test probes to switch GREY/GREEN and
WHITE/BLACK wires. Measure resistance, there
should be NO continuity (open circuit).
Connect one test probe to the WHITE/GREY wire
and the other test probe to the switch top termi-
nal. Measure resistance, it must be close to 0
ohm.
Connect one test probe to the GREY/GREEN wire
and the other test probe to the switch ring. Mea-
sure resistance, it must be close to 0 ohm.
Tether Cord Cap on DESS Post
Connect test probes to switch GREY/GREEN and
WHITE/BLACK wires. Measure resistance, it
mustbecloseto0ohm.
SPARK PLUGS
Disassembly
Disconnect the spark plug cable from the spark
plug.
First unscrew the spark plug one turn.
Clean the spark plug and cylinder head with pres-
surize air then completely unscrew.
Spark Plug Installation
Prior to installation make sure that contact sur-
faces of the cylinder head and spark plug are free
of grime.
1) Using a wire feeler gauge, set electrode gap
according to the following chart.
2) Apply anti-seize lubricant over the spark plug
threads to prevent possible seizure.
3) Hand screw spark plug into cylinder head.
Then, tighten the spark plug clockwise an
additional 1/4 turn with a proper socket.
mmr2005-029 295

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