Section 06
ENGINE MANAGEMENT (DI)
Subsection 02
(OVERVIEW)
06-02-4
SMR2002-074_06-02A.FM
ELECTRONIC MANAGEMENT
MPEM
(multi-purpose electronic module)
The electronic fuel injection is equipped with a
MPEM. It is also called ECU (Electronic Control
Unit). It is the brain of the electrical system/fuel
injection system.
TYPICAL
1. Multi-purpose electronic module (MPEM)
The MPEM is mounted in the front of the water-
craft.
The MPEM is directly powered by the battery. It is
responsible for the following engine management/
electrical functions:
– interpreting information
– distributing information
– start/stop function
– timer
– DESS (Digitally Encoded Security System)
– ignition timing maps
– injection maps (fuel injector and direct injector)
– MPEM contains a total of 34 maps (injection
and ignition) for optimum engine operation in all
conditions
– engine RPM limiter
– etc.
The MPEM features a permanent memory that
will keep the programmed safety lanyard(s) active,
fault codes and other vehicle information, even
when the battery is removed from the watercraft.
MPEM — General Functions
Automatic Power Shut-Down
The MPEM is equipped with an automatic power
shut-down. This feature prevents the battery from
losing its charge if the safety lanyard cap is left on
the post when the engine is not running.
After connecting the safety lanyard cap, the
MPEM will remain in standby mode during the
next 10 minutes, waiting for a starting. If the start/
stop button is not depressed, then the MPEM will
be automatically powered down.
Antistart Feature
This system allows starting the vehicle only with
safety lanyard(s) that has been programmed to op-
erate a specific watercraft. This functionality is the
DESS system. See below for details.
Digitally Encoded Security System (DESS)
The following components are specially designed
for this system: Multi-Purpose Electronic Module
(MPEM), safety lanyard cap and safety lanyard
post.
F12D0EA
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Summary of Contents for GTX 4-TEC 5573 2002
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