Ski-Doo Ski Doo MX Z 2005 [1127/1429] Electronic fuel injection

Ski-Doo Ski Doo MX Z 2005 [1127/1429] Electronic fuel injection
Section 05 ENGINE MANAGEMENT (2-TEC)
Subsection 01 (OVERVIEW)
EMS ENGINE MANAGEMENT SYSTEM FUNCTIONS
A32A1SS
ENGINE
CONTROL
MODULE
(ECM)
Throttle position sensor (TPS)
Knock sensor (KS)
Exhaust gas temperature sensor (EGTS)
Crankshaft position sensor (CPS)
Buzzer
Ignition coil
RAVE solenoid
Fuel injector (4)
Fuel pump
Speedometer
Communication port
INPUTS OUTPUTS
SDI SYSTEM
Air temperature sensor (ATS)
Air pressure sensor (APS)
Water temperature sensor (WTS)
Battery voltage
Digitally encoded security system (DESS)
START/RER button
Oil tank low-level
Communication port
This engine management system controls the fuel
injection, the ignition timing and the electronically
controlled RAVE.
As shown in the ENGINE MANAGEMENT SYS-
TEM FUNCTIONS illustration, the ECM is the cen-
tral point of the fuel injection system. It reads
the inputs, makes computations, uses pre-deter-
mined parameters and sends the proper signals
to the outputs for proper engine management.
The ECM also stores the fault codes and general
information such as: operating conditions, vehicle
hours, serial numbers, customer and maintenance
information.
ELECTRONIC FUEL INJECTION
The ECM receives the signals from different sen-
sors which indicate engine operating conditions at
milli-second intervals.
Signals from sensors are used by the ECM to de-
termine the injection parameters (fuel maps) re-
quired for optimum air-fuel ratio.
The CPS and TPS are the primary sensors used
to control the injection and ignition timing. Other
sensors are used for secondary input.
262 mmr2005-028

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