2005 Ski-Doo REV Series Shop Manual, Page 219Get this manual
Section 05 ENGINE MANAGEMENT (POWER TEK) Subsection 01 (OVERVIEW)
Manual Start Models At cranking, the magneto sends AC current to the voltage regulatorrectifier that in turn, supplies the ECM with DC currentThe ECM then supplies critical functions such as the ignition for engine startingWhen engine reaches approximately 800 RPM, the ECM activates the relay that in turn, supplies the electrical loads (lights, accessories etc
Electric Start Models The ECM is directly powered by the batteryWhen the start switch is activated, it wakes up the ECM which activates the ignition and starting systemWhen engine reaches approximately 800 RPM, the ECM activates the relay and in turn, it allows current from the voltage regulatorrectifier (supplied by the magneto) to go either to supply the electrical loads (lights, accessories etc or to charge the battery through the relay