Section 08
ENGINE MANAGEMENT (4-TEC)
Subsection 02
(OVERVIEW)
08-02-6
SMR2003-026_08-02A.FM
TYPICAL
1. EMS ECU on intake manifold
The EMS ECU gets its power by the MPEM which
is directly powered by the battery. It is responsible
for the following engine management/electrical
functions:
– interpreting information
– distributing information
– start/stop function
– DESS (Digitally Encoded Security System)
– ignition timing control
– injection control
– The EMS ECU applies the proper map (injection
and ignition) for optimum engine operation in all
conditions.
– engine RPM limiter
– etc.
The EMS ECU features a permanent memory that
will keep the programmed safety lanyard(s) active,
fault codes and other engine information, even
when the battery is removed from the watercraft.
EMS — GENERAL FUNCTIONS
Safety Lanyard Reminder
If engine is not started within 5 seconds after in-
stalling the safety lanyard on its post, 4 very short
beeps every 3 second interval will sound for ap-
proximately 4 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.
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), EMS ECU, safety lanyard cap and safety
lanyard post.
The safety lanyard cap contains a magnet and a
ROM chip. The magnet actually closes the reed
switch inside the post which is the equivalent of a
mechanical ON/OFF switch. The chip has a unique
digital code.
The DESS circuitry in the EMS ECU is activated at
the factory. Therefore, a safety lanyard must be
programmed to start the engine.
NOTE:
Actually, it is the memory of the EMS ECU
which is programmed to recognize the digital code
of the safety lanyard cap. This is achieved with the
VCK (Vehicle Communication Kit) P/N 529 035
844. Refer to B.U.D.S. help system to program a
safety lanyard.
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R1503motr214A
R1503motr219A
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Содержание 2003 GTI LE RFI
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