Ski-Doo Ski Doo MX Z 2005 [1203/1429] Dess switch verification

Ski-Doo Ski Doo MX Z 2005 [1203/1429] Dess switch verification
Section 06 ENGINE MANAGEMENT (4-TEC)
Subsection 03 (COMPONENT INSPECTION AND ADJUSTMENT)
Test corresponding fuse, relay and wiring.
Disconnect the connector of the steering harness.
Measure the resistance of the BLUE/RED and
LIGHT BROWN wires for 0
. Depress start
button and the reading should change from 0
to infinitely 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-17. If it is good, try a
new ECM. Otherwise, repair harness/connectors.
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 engine is start-
ed, refer to DIAGNOSTIC PROCEDURES.
The following continuity tests can also be per-
formed using an ohmmeter.
Disconnect DESS post wires.
Tether Cord Cap Removed
Connect test probes to DESS post GREY/GREEN
and WHITE/BLACK wires. Measure resistance,
there should be NO continuity (open circuit).
Connect one test probe to the WHITE/GRAY wire
and the other test probe to the DESS post top
terminal. Measure resistance, it must be close to
0ohm.
Connect one test probe to the GREY/GREEN wire
and the other test probe to the DESS post ring.
Measure resistance, it must be close to 0 ohm.
Tether Cord Cap on DESS Post
Connect test probes to DESS post GREY/GREEN
and WHITE/BLACK wires. Measure resistance, it
must be close to 0 ohm.
SPARK PLUGS
Disassembly
WARNING
Never remove ignition coil from the spark
plug without disconnecting it from the wiring
harness. Flammable vapors may be present
in the engine compartment and ignited by a
spark which could cause an explosion.
Disconnect the wiring harness from the ignition
coil.
Remove the ignition coil.
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.
Using a wire feeler gauge, set electrode gap
according to the following chart.
Apply anti-seize lubricant over the spark plug
threads to prevent possible seizure.
Hand screw spark plug into cylinder head.
Then, tighten the spark plug clockwise an addi-
tional 1/4 turn with a proper socket.
A00E0BA
2
1
TYPICAL
1. Proper socket
2. Improper socket
mmr2005-032 339

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