2004 Ski-Doo REV Series Factory Service Manual, Page 190Get this manual
Section 05 2TEC ENGINE MANAGEMENT Subsection 01 (OVERVIEW)
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 vehicle
EMS GENERAL FUNCTIONS
Automatic Power Shut-Down
The ECM is equipped with an automatic power shut-downThis feature prevents the battery from losing its charge if the tether cord cap is left on the post when the engine is not running for more then 30 secondsThe ECM will remain offline until the electric starter or the rewind starter is activatedThe ECM will shut down all outputs after seconds when the tether cord cap is removed
When starting the engine with tether cord cap on the post, the DESS is activated and will emit audible signals: short beeps indicate working tether cord capVehicle can be driven short beep indicates wrong tether cord cap is being used or that something is defectiveVehicle can not be drivenThe memory of the ECM features two self-diagnostic modes for the DESS operationRefer to DIAGNOSTIC PROCEDURES section for more informationThe memory of the ECM is permanentIf the battery is disconnected, no information is lostNote that the DESS anti-drive circuitry is already activated on all new ECMs