Sea-doo 2003 GTI LE RFI, Shop Manual

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Section 12 ELECTRICAL SYSTEM
Subsection 06 (DESS (CARBURETED AND RFI ENGINES))
SMR2003-039_12_06A.FM
12-06-1
DESS (CARBURETED AND RFI
ENGINES)
0
NOTE: For DI and 4-TEC models , refer to ENGINE
MANAGEMENT section.
Carburetor-Equipped Models and 787 RFI
GENERAL
The Digitally Encoded Security System (DESS)
features an anti-start protection against unautho-
rized use of the watercraft.
The following components are specially designed
for this system: Multi-Purpose Electronic Module
(MPEM), safety lanyard cap and safety lanyard
switch.
The safety lanyard cap has a magnet and a ROM
chip. The chip has a unique digital code.
The DESS circuitry in the watercraft MPEM is ac-
tivated at the factory. Therefore, a safety lanyard
must be programmed to start the engine.
NOTE: Actually, it is the memory of the MPEM
which is programmed to recognize the digital code
of the safety lanyard cap. This is achieved with the
VCK (P/N 529 035 844) or with the MPEM pro-
grammer (P/N 529 035 878). Refer to the MPM
programmer Guide to program a safety lanyard or
to the Help system in the VCK’s B.U.D.S. softw-
ware. For the VCK connections, see below for the
procedures.
The system is quite flexible. Up to eight safety lan-
yards may be programmed in the memory of the
watercraft MPEM. They can also be erased.
NOTE: If desired, a safety lanyard can be used on
other watercraft equipped with the DESS.
The memory of the MPEM is permanent. If the
battery is disconnected, no information is lost.
The MPEM features a self-diagnostic mode. Refer
to the chart below.
When ordering a new MPEM from the regular
parts channel, the DESS circuitry will be activated.
Self-Diagnostic Mode
It is self-activated when the safety lanyard cap is being installed on the watercraft switch. It gives imme-
diate monitoring. Refer to the following chart.
SIGNAL CAUSE REMEDY
2 short beeps
(while installing safety
lanyard on watercraft
post).
• Safety lanyard is recognized
by the MPEM.
• Good contact between safety
lanyard cap and DESS post.
• Ignition is authorized, engine can be started normally.
1 long beep
(while installing safety
lanyard on watercraft
post).
•
Bad connection between safe-
ty lanyard cap and post. • Remove and reinstall the safety lanyard on the post
until 2 short beeps are heard to indicate the system
is ready to allow engine starting.
• Unprogrammed or defective
safety lanyard.
•
Use the safety lanyard that has been programmed for
the watercraft. If it does not work, check safety lan-
yard condition with the programmer. Replace safety
lanyard if reported defective.
• Salt water or dirt in safety
lanyard cap.
• Clean safety lanyard cap to remove dirt or salt water.
A 2 seconds beep
every minute intervals
(RFI models) .
• Fuel tank level is low. • Refill.
4 short beeps
every 3 seconds
interval for 2 hours.
• Safety lanyard has been left
on its post without starting
engine or after engine was
stopped.
• To prevent battery discharge,remove the safety lan-
yard from its post.
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