Just been out to look at the state of my battery (I just could not resistor)
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On my R1200GS I have a TT Rider perminantly connected to the under seat socket and keep the Rider in the "shoe" on the bike. My (BMW)battery is fully charged and I hav'nt used the bike about a week. By whats been said above my battery should be dead.
What is going on?
I don't think I'm explaining this very well.
If there is a reasonable (I don't know what value this would need to be) current draw the CanBus will shut down normally. If there is no current draw it will shut down normally.
If, however, there is a very small current draw then sometimes the CanBus fails to shut down properly and the battery is drained.
A small current wouldn't normally, but could I suppose, drain the battery. What does drain it is the BMW computer constantly re-checking the CanBus wiring and failing to shut down properly.
If you leave TT Rider in its cradle it is probably drawing enough current, the CanBus senses this and shuts down correctly. Your battery will therefore remain charged as there is no drain on it. 'Nuffsaid left the cradle connected but had removed the TT unit. The cradle may have been drawing a very small current (usually the voltage converter) which the CanBus cannot cope with, gets confused and does not shut down.
You could try it by starting the bike, turning it off and removing the TT unit before the CanBus shuts down. Go back after 1/2 hr and see if the circuit is still live. (The TT unit will still be drawing a charge current). If you leave it connected after a short while the Canbus should shut down normally and the TT will no longer be drawing a charge current. (I don't have a TT so I may be talking balls
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(I also have a sneaking suspicion that this may be a GSA not a GS fault)
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