2004 Skidoo ZX Series Service Manual, Page 342Get this manual
Section 07 ENGINES MANAGEMENT (4-TEC) Subsection 01 (OVERVIEW)
The tether cord cap contains magnet and ROM chipThe magnet actually closes the reed switch inside the post which is the equivalent of mechanical ONOFF switchThe chip has unique digital codeNOTE: Actually, it is the memory of the ECM which is programmed to recognize the digital code of the tether cord capThis is achieved with the VCK (Vehicle Communication Kit) (PN 529 035 844)Refer to B.U.D.Shelp system to program tether cord capThe system is quite flexibleUp to tether cord caps may be programmed in the memory of the vehicle ECMThey can also be erased individuallyNOTE: If desired, tether cord cap can be used on other vehicles equipped with the DESSIt only needs to be programmed for that vehicleThe memory of the ECM features self-diagnostic mode 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 ECM