Section 07 ELECTRICAL SYSTEM
Subsection 04 (INSTRUMENTS AND ACCESSORIES)
– ignition system
– Digitally Encoded Security System
– monitoring system
– diagnostic mode.
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.
Accessories are protected by fuses integrated in
theMPEM,infuseholder(s)closetoMPEMor
in the electrical box. Fuses are identified besides
their holder. See below for fuses location and de-
scription.
Gauge 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.
Safety Lanyard Reminder
If engine is not started within 5 seconds after
installing the safety lanyard on its post, 4 short
beeps every 3 second interval will sound for ap-
proximately 2 hours to remind you to start the en-
gine or to remove safety lanyard. Afterwards, the
beeps will stop. The same will occur when safety
lanyard is left on its post 5 seconds after engine is
stopped.
Always ensure safety lanyard is not left on its post
after engine is stopped.
IMPORTANT: Leaving the safety lanyard on its
post when engine is not running will slowly dis-
charge the battery.
Ignition System
The MPEM controls the ignition timing.
Engine RPM Limiter
The MPEM will limit the maximum engine speed.
Digitally Encoded Security
System (DESS)
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
beingusedandgaugesaresuppliedwithcur-
rent for 33 seconds. The MPEM will thus allow
the engine to start.
– 1 long beep indicates a wrong safety lanyard
is being used or that the anti-start feature is
defective. Current to gauges is cut after the
audible signal 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 mem-
ory.
To better understand the anti-start feature, refer
to DESS (DIGITALLY ENCODED SECURITY SYS-
TEM) section.
If the MPEM responds differently than specified,
refer to the TROUBLESHOOTING section.
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.
Monitoring System
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 to the Information
Center gauge.
When the oil level is low in the reservoir, the
MPEM sends out a signal to the Information
Center gauge and the pilot lamp on the gauge will
turn on.
Overheat Sensor
When the engine temperature reaches a threshold
value, the MPEM triggers a continuous beep to
indicate overheating.
smr2005-060 197
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