I have the non-communicating TCU issue since the upgrade and when I learned of the audio fuse pull, I have had to do it twice. I haven't had any accessory battery issues yet though.
I have made numerous calls to Nissan for this issue and they keep moving it up to a higher level(I'm told). I don't know how high it needs to go to get it resolved. The Nissan people I talk to are always polite and apologetic for my problem, but can never offer acknowledgement of a known problem. I have had a few calls back from Nissan basically inquiring if my issue has been solved. Of course I tell them no and relate the temporary audio fuse pull solution. They don't seem to know about that either, but will pass that over to the tech folks.
I have filled out a few surveys about my calls to Nissan and continue to tell them the problem is not solved and about the temp fix. I will continue to do this and maybe they will eventually solve the problem. Seems to me that a software update to reset the TCU once a month could resolve some of these issues.
2011 Leaf SL-e
Longest continously owned Leaf in Georgia.
LED Upgrades: Parking lights, tag lights, back-up lights, side lights, interior lights,DRLs,LED Hi-beam.
Additional upgrades: Horn upgrade, pedestrian warning bell.