2005 Ski-Doo REV Series Shop Manual, Page 249Get this manual
Section 06 ENGINE MANAGEMENT (SDI) Subsection 01 (OVERVIEW)
A33I09A A33I08A
ENGINE MANAGEMENT SYSTEM (EMS)
The EMS (Engine Management System) is equipped with an ECM which controls the ignition system, the vehicle electrical system, the fuel injection system and the electronically controlled RAVE
The ECM is directly powered by the batteryIt is responsible for the following engine managementelectrical functions: interpreting information distributing information startstop function DESS (Digitally Encoded Security System) ignition control injection control NOTE: The ECM applies the proper maps (injection and ignition) for optimum engine operation in all conditions engine RPM limiter RER (Rotax Electronic Reverse) etcThe ECM features 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 vehicleManual Start Models While cranking, the magneto sends AC current to the voltage regulatorrectifier that in turn, sends signal to the ECMThis wakes up the Engine Management System and activate the starting system relay (R1) and the capacitor relay (R4)Just small rotation of the engine is needed to wake-up the ECMThe RER switch may also be used to wake-up the Engine Management SystemWaking-up the EMS before doing start attempt result in faster start-up