Section 07
ENGINE MANAGEMENT (4-TEC)
Subsection 02
(OVERVIEW)
SMR2002-077_07-02A.FM
07-02-7
The EMS ECU also offers a special safety lanyard
— the Sea-Doo LK™ (learning key) — which can
be programmed so that the vehicle can be run only
at a limited speed — approximately 55 km/h
(35 MPH). Such feature is ideal for first time riders
or renters.
NOTE:
If desired, a safety lanyard can be used on
other watercraft equipped with the DESS. It only
needs to be programmed for that watercraft.
When connecting a safety lanyard cap on the post,
the DESS is activated and will emit audible signals:
– 2 short beeps indicate a working safety lanyard.
Engine starting can take place.
– 1 long beep indicates a wrong safety lanyard is
being used or that something is defective. En-
gine starting is not allowed.
The memory of the EMS ECU features a self-
diagnostic mode for the DESS operation. Refer to
DIAGNOSTIC PROCEDURES section for more in-
formation.
The memory of the EMS ECU is permanent. If the
battery is disconnected, no information is lost.
When ordering a new EMS ECU from the regular
parts channel, the DESS circuitry will be activated.
Engine Starting
If the EMS ECU 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 EMS ECU automatically stops the starter
when the engine speed reaches 1600 RPM.
If start button is activated while the throttle lever
is depressed more than 65%, the engine will not
be allowed to start.
Engine RPM Limiter
The EMS ECU 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 its post.
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-Oil Pressure Warning Device
When the oil pressure falls under a certain level,
the EMS ECU sends out a signals for the beeper
and to the information center gauge. Additionally
the engine goes in limp home mode.
High Coolant Temperature and EGT
Warning Device
When the coolant temperature or the exhaust gas
temperature is getting to high, the EMS ECU
sends out signals to the beeper.
WARNING
When programming a Sea-Doo LK™ (learning
key), use only a lanyard that is identified for
that purpose. Otherwise, a customer could
use a vehicle with a greater speed than he was
expecting.
www.SeaDooManuals.net
Summary of Contents for GTX 4-TEC 5573 2002
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