I would have thought this was crazy, but just yesterday I saw a mention of this in the manual. Let me try that. Let's dub this paranoid mode since the car is nervous about being unlocked. :D
Now that you mention it I have heard motors at random times when I am around the car. If this is it, I am glad it is pulling from the house rather than the 12v battery. After sitting for a weekend, that can get discharged quite a bit I have noticed.
I just happened to look at my online EVSE monitor and noticed that the car started charging at 0.7A (240V) at 7:20AM after sitting all night charged to 80%, my charge limit. This lasted until 7:46 when it went back to zero. During the process it was saw toothing between 0.7A and 0.9A, but not...
Get an old headphone set and cut one of the earbuds off. The wire is thin but you can solder the two ends (separately) you can stick them into the connector. Tape it up good or better to use heat shrink and you are all set. Then pull it apart at lease end and put it all back.