Ski-Doo Ski Doo MX Z 2005 [250/1429] Engine management system ems

Ski-Doo Ski Doo MX Z 2005 [250/1429] Engine management system ems
Section 06 ENGINE MANAGEMENT (SDI)
Subsection 01 (OVERVIEW)
A33I08A
ENGINE MANAGEMENT
SYSTEM (EMS)
The EMS (Engine Management System) is
equipped with an ECM which controls the ig-
nition system, the vehicle electrical system, the
fuel injection system and the electronically con-
trolled RAVE.
A32E3AA
TYPICAL ECM
The ECM is mounted in the front of the vehicle.
A33I09A
The ECM is directly powered by the battery. It
is responsible for the following engine manage-
ment/electrical functions:
interpreting information
distributing information
start/stop function
DESS (Digitally Encoded Security System)
ignition control
injection control
NOTE: The ECM applies the proper maps (injec-
tion and ignition) for optimum engine operation in
all conditions.
engine RPM limiter
RER(RotaxElectronicReverse)
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.
Manual Start Models
While cranking, the magneto sends AC current to
the voltage regulator/rectifier that in turn, sends a
signal to the ECM. This wakes up the Engine Man-
agement System and activate the starting system
relay (R1) and the capacitor relay (R4). Just a small
rotationoftheengineisneededtowake-upthe
ECM.
TheRERswitchmayalsobeusedtowake-upthe
Engine Management System.
Waking-up the EMS before doing a start attempt
result in faster start-up.
234 mmr2005-079

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