i might be having a senior moment, but do you have to change the optimate 4 to can-bus mode to charge? My 2010MY 1200mts came with the 2 prong lead already attached so I just plugged in? Thanks
My understanding is... If your lead is wired straight to the battery then there is no requirement for Can-Bus. Can-Bus is used when the manufacturers charging point within the wiring loom is used.
Just plug it in to the optimate socket. All my bikes have optimate leads straight to batrery. No need to set to can bus on the charger. Remember that the aux sockets are both fused, and only enabled with ignition on, so can't generally be used for charging. I understand the BMW aux sockets will 'wake up' when a charger is plugged in. My 2010 and 2012 multis definitely don't do this. (Edit: just looked at the optimate site and it specifically says the can bus mode is for BMW bikes)
Ok...what was throwing me off was the optimate lead I plugged into must have been fitted wrongly, using the clips direct to the battery now and it's fine.
Pin 1 of the diagnostic connector goes straight to a permanent live from the battery via fuse 6 (7.5A) in the rear fusebox and pin 2 to earth. There is no need for a canbus charger.
