I have picked up on another one of these situations on a 2010 JSW.
The fluid is leaking from a vent in the multi-pin connector. It is a tiny hole in the inner circle of the void where there are no pins. It looks like a small brass tube that is half-covered by the outer ring of plastic. (sorry, no paint program available to circle it ).
This picture is of a different mechatronic connector that is out of the car so that the connector vent is in plain view.
located about 3:15 o'clock on the inner circle of the void...
I pulled the tranny vent cap off and applied a little compressed air to force the issue. It weeps a bit of fluid when I do that. The pins do not have the leak.
The place that changed the fluid (118K) last sold the customer 6 quarts or liters...it does not specify in the work order but, probably liters but, who know how much of that was the final level of fluid.
I drained right about 4 liters of fluid from the trans just now and it is 34K later.
There does not seem to be any seepage around the case vent but the front of the cover and underneath the tranny is drizzled with fluid.
The dealer wanted to replace the mechatronic and maybe the harness at near $5000!!!
Has anyone ripped one of these trashed mech's apart?
It would be handy to know how the fluid got pushed into a gasket-sealed connector with enough force to leak out the back side onto the trans.