Section 05 2–TEC ENGINE MANAGEMENT
Subsection 01 (OVERVIEW)
– RER (Rotax Electronic Reverse)
– etc.
The ECM features a permanent memory that will
keep the programmed tether cord cap(s) code,
fault codes and other vehicle information, even
when the battery is removed from the vehicle.
EMS — GENERAL FUNCTIONS
Automatic Power Shut-Down
The ECM is equipped with an automatic power
shut-down. This feature prevents the battery
from losing its charge if the tether cord cap is
left on the post when the engine is not running
for more then 30 seconds. The ECM will remain
offline until the electric starter or the rewind
starter is activated. The ECM will shut down all
outputs after 5 seconds when the tether cord cap
is removed.
Antidrive Feature
This system allows the engine to reach pulley en-
gagement speed only if a programmed tether cord
cap is installed on DESS post. See below for de-
tails.
Digitally Encoded Security
System (DESS)
The following components are specially designed
for this system: ECM, tether cord cap and DESS
post.
The tether cord cap contains a magnet and a ROM
chip. The magnet actually closes the reed switch
inside the post which is the equivalent of a me-
chanical ON/OFF switch. The chip has a unique
digital code.
NOTE: Actually, it is the memory of the ECM
which is programmed to recognize the digital
code of the tether cord cap. This is achieved
with the VCK (Vehicle Communication Kit P/N 529
035 981). Refer to their operation manual or help
system to program a tether cord cap.
The system is quite flexible. Up to 8 tether cord
caps may be programmed in the memory of the
vehicle ECM. They can also be erased individually.
NOTE: If desired, a tether cord cap can be used
on other vehicle equipped with the DESS. It only
needs to be programmed for that vehicle.
When starting the engine with a tether cord cap
on the post, the DESS is activated and will emit
audible signals:
– 2 short beeps indicate a working tether cord
cap. Vehicle can be driven.
– 1 short beep indicates a wrong tether cord cap
is being used or that something is defective.
Vehicle can not be driven.
The memory of the ECM features two self-diag-
nostic modes for the DESS operation. Refer to
DIAGNOSTIC PROCEDURES section for more in-
formation.
The memory of the ECM is permanent. If the bat-
tery is disconnected, no information is lost.
Note that the DESS anti-drive circuitry is already
activated on all new ECMs.
Gauges Current Supply
The purpose of this function is to allow reading
of gauges without the engine running. It will give
access to most functions of the information center
gauge without starting the engine.
Gauges are supplied with current for 30 seconds
when connecting the tether cord cap on its post
and pressing the START/RER switch.
NOTE: Each time the tether cord cap is connected
to the post and START/RER switch is depressed,
the fuel pump is activated for 2 seconds to build
up pressure in the fuel injection system.
Engine Starting
If the ECM recognizes a valid tether cord cap, it
allows engine to rev above 3000 RPM.
If the tether cord cap is left on the DESS post for
more than 30 seconds after stopping the engine,
the ECM will shut down. The current supply to
gauges will be stopped as explained in the AN-
TIDRIVE FEATURE section.
Engine RPM Limiter
The ECM will limit the maximum engine speed.
Low-Oil Level Warning Device
When the oil falls under a certain level, the low oil
level LED will be illuminated. The buzzer will also
be activated intermittently.
168 mmr2004-Rev
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