Sea-doo 2003 GTI LE RFI, Shop Manual

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Section 08 ENGINE MANAGEMENT (4-TEC)
Subsection 03 (COMPONENT INSPECTION AND ADJUSTMENT)
SMR2003_027 _08_03A.FM
08-03-33
If the switch tests good, temporarily disconnect
the inline DESS auxiliary module (
if so equipped )
(see safety lanyard switch verification below for
more information). Connect the 6-pin connector to
bypass the auxiliary module. Try the start/stop
switch.
If it works, try a new auxiliary module. Otherwise,
continue testing procedure.
Test continuity of circuit 2-23. If it is good, try a new
MPEM. Otherwise, repair harness/connectors.
Test continuity of circuit B-19. If it is good, try a new
EMS ECU. Otherwise, repair harness/connectors.
SAFETY LANYARD SWITCH
VERIFICATION
If 2 short beeps are not heard when installing the
safety lanyard, refer to DIAGNOSTIC PROCEDURES.
The following continuity tests can also be per-
formed using an ohmmeter.
Disconnect switch wires.
Safety Lanyard Removed
Connect test probes to switch BLACK and BLACK/
YELLOW 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 switch top termi-
nal. Measure resistance, it must be close to
0 ohm.
Connect one test probe to the BLACK wire and the
other test probe to the switch ring. Measure resis-
tance, it must be close to 0 ohm.
DESS Auxiliary Module ( if so equipped )
This module enhances safety lanyard recognition
at the EMS ECU. It is located under steering sup-
port. It is an inline connection of the DESS post
harness.
If a safety lanyard cannot be programmed or it fails
to be recognized, first refer to the basic self diagnos-
tic mode in DIAGNOSTIC PROCEDURES section.
If it still does not work, disconnect the DESS aux-
iliary module and connect the regular 6-pin DESS
harness.
a. Try pushing down and turning the lanyard on its
post. If it is working now, check module harness/
connections and if they are in good condition, try
a new module.
b. If it is now working, check module harness/
connections. Ensure wires from MPEM and
EMS ECU are properly positioned in connector
and match those on auxiliary module side. Refer
to WIRING DIAGRAMS. If harness/connector
are correct, try a new module.
Reconnect module.
If the above procedures did not work, refer to elec-
trical troubleshooting in TROUBLESHOOTING
and ENGINE MANAGEMENT sections.
Safety Lanyard on Switch
Connect test probes to switch BLACK and BLACK/
YELLOW wires. Measure resistance, it must be
close to 0 ohm.
SPARK PLUGS
Disassembly
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.

WARNING
Never remove ignition coil from the spark
plug without disconnecting it from the wiring
harness. Flammable vapors may be present
in the bilge and ignited by a spark which
could cause an explosion.
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