2004 Ski-Doo Elite Factory Service Manual, Page 181Get this manual
Section 05 ENGINE MANAGEMENT Subsection 01 (OVERVIEW)
EMS ENGINE MANAGEMENT FUNCTIONS
1503 4-TEC CONTROL SYSTEM INPUTS Throttle position (TPS) Crankshaft position (CPS) Camshaft position (CAPS) Coolant temperature (CTS) Manifold air pressure (MAPS) Oil pressure (OPS) Oil tank pressure (OTPS) Knock sensor (KS) Battery voltage (BV) Digitally Encoded Security System (DESS) Tip-over protection system (TOPS)
A34C1GS
OUTPUTS Fuel pump Starter solenoid ENGINE CONTROL MODULE (ECM) Ignition coil (3) Fuel injector Idle bypass valve Communication port to VCM
This engine management system controls both the fuel injection and the ignition timingAs shown in the CONTROL SYSTEM illustration, the ECM ECU is the central point of the fuel injection systemIt reads the inputs, makes computations, uses pre-determined parameters and sends the proper signals to the outputs for proper engine managementThe ECM ECU also stores the fault codes and general information such as: operating conditions, vehicle hours, serial numbers, customer and maintenance information