Sea-doo 2003 GTI LE RFI, Shop Manual

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Section 12 ELECTRICAL SYSTEM
Subsection 05 (INSTRUMENTS AND ACCESSORIES)
12-05-2
SMR2003-038_12_05A.FM
IMPORTANT: Leaving the safety lanyard on its
post when engine is not running will slowly dis-
charge the battery.
Antistart Feature
When connecting a safety lanyard cap on the switch
the DESS system inside the MPEM is activated
and will emit audible signals:
– 2 short beeps indicate a right safety lanyard is
being used and gauges are supplied with cur-
rent for 33 seconds. The MPEM will thus allow
the engines to start.
– 1 long beep indicates a wrong safety lanyard is
being used or that the antistart feature is defec-
tive. Current to gauges is cut after the audible sig-
nal is emitted and the engine cannot be started.
A wrong safety lanyard is a safety lanyard which is
defective or not programmed in the MPEM memory.
To better understand the antistart feature, refer to
DESS (DIGITALLY ENCODED SECURITY SYSTEM).
If the MPEM responds differently from what is
mentioned above, refer to the troubleshooting
section to find out why.
Gauges Current Supply
When the safety lanyard is installed, it activates
the reading of gauges without the engine running.
It will give access to most functions of the infor-
mation center gauge without starting the engine.
NOTE: On the RFI models , the fuel pump will be
activated for 1 second to build up pressure in the
fuel injection system, only when connecting the
safety lanyard cap to the switch.
Engine Starting
If the MPEM recognizes a valid safety lanyard, it
allows engine to start when the start/stop switch
is pressed.
If start/stop button is held after engine has started,
the MPEM automatically stops the starter when
the engine speed reaches 1000 RPM.
Engine RPM Limiter
The MPEM will limit the maximum engine speed.
Engine Stopping
There are two ways to stop the engine.
Press start/stop switch or remove the safety lan-
yard cap from the switch.
Low-Fuel Level Warning Device
When the fuel level in the reservoir is low, the fuel
level sensor transmits a signal to the MPEM. The
MPEM sends out signals for the beeper (
RFI mod-
els only) and to the Information Center gauge.
When the oil level is low in the reservoir, the
MPEM sends out a signal to the Information Cen-
ter gauge and the pilot lamp on the gauge will turn
on.
Power Distribution
A power supply cut-off relay supplies the MPEM
from the battery.
The MPEM distributes power from the cut-off re-
lay to all accessories (except bilge pump which is
connected to battery power on
XP DI models ).
Accessories are protected by fuses integrated in
the MPEM, in fuse holder(s) close to MPEM or in
the electrical box. Fuses are identified besides
their holder. See below for fuses location and de-
scription.
Overheat Sensor
When the engine temperature reaches a threshold
value, the MPEM triggers a continuous beep to indi-
cate overheating.
Diagnostic Mode
In order to facilitate the use of the watercraft, a
system controls the digitally encoded security sys-
tem (DESS) and sends, through a buzzer, some
audible signals informing the operator of a specific
situation. The diagnostic mode is automatically ac-
tivated when connecting the safety lanyard cap to
the switch. Refer DIGITALLY ENCODED SECURI-
TY SYSTEM.
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