Sea-doo RX Shop Manual page 219

Gauges are supplied with current for 33 seconds
when connecting the safety lanyard cap on the
switch or when pressing the start/stop switch
without the safety lanyard on the DESS post.
Engine Starting
If the MPEM recognizes a valid safety lanyard, it
allows engine to start when the start/stop switch
is pressed.
If the safety lanyard is left on the DESS post for
more than 10 minutes after stopping the engine,
the MPEM may send out 1 long beep when press-
ing the start/stop switch. The current supply to
gauges will be stopped as explained in the Anti-
start Feature section. A light pressure on the safe-
ty lanyard is required to allow the MPEM to read
and validate the safety lanyard, the engines can
then be started.
If start/stop button is held after engine has started,
the MPEM automatically stops the starter when
the engine speed reaches 700 or 1000 RPM de-
pending on the MPEM used.
Engine RPM Limiter
The MPEM will limit the maximum engine speed.
Engine Stopping
There are 2 ways to stop the engine.
Press and hold start/stop switch or remove the
safety lanyard cap from the switch.
If the engine is stopped by removing the safety lan-
yard, it is possible to restart the engine as explained
in the engine starting section.
If safety lanyard cap is reconnected within 6 sec-
onds, the current supply to gauges is cut for a brief
moment and comes back on with the audible sig-
nal of safety lanyard validation.
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 info center gauge.
When the oil level is low in the reservoir, the MPEM
sends out a signal to the info center gauge and the
pilot lamp on the gauge will turn on.
SMR2000-060_09_02A.FM
Section 09 ELECTRICAL SYSTEM
Power Distribution
The MPEM distributes power from battery to all
accessories. Accessories are protected by fuses
integrated in the MPEM. For fuse identification, re-
fer to IGNITION SYSTEM TESTING PROCEDURE
farther in this section.
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 divided into 2
parts: the basic mode and the advanced mode. The
basic mode is automatically activated when connect-
ing the safety lanyard cap to the switch. The advance
mode can only be activated when pressing the
start/stop switch. Refer DIGITALLY ENCODED
SECURITY SYSTEM.
The 947 engine has a digital Direct Current-Capacitor
Discharge Ignition (DC-CDI) system within the
MPEM which receives the input from the trigger
coil and signals the ignition coil when to fire.
TYPICAL
1. MPEM
Compared to the magneto system, the DC-CDI
system offers a more powerful and stable ignition
at low RPM.
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Subsection 02 (IGNITION SYSTEM)
09-02-3