Ski-Doo has suggested all models fitted with the 800 PowerTEK engine packages (2005 & 2006) should have di-electric grease applied to the ECM connector during off-season storage to prevent corrosion of the connector. This is the main connector that plugs into the ECM module.
There is a specific procedure to follow here, being that we’re dealing with the main computer box for the vehicle. Contact your local Ski-Doo dealer to have this preventative procedure performed, or to obtain specific instructions and supplies for qualified technicians.