Said Mini Cooper had a no start condition due to the battery being drained; I need to investigate further to determine if the UG was responsible, but this did happen shortly after its installation, where there was no issues before.
If I get the chance, I intend to put an ammeter inline with the battery and monitor the current draw both with and without the UG installed to know for sure.
For now, I've unplugged it, as it's a friend's car and not mine.
Is there any information on how it can be more easily determined if the UG is keeping the ECM from going into sleep mode? I did set the mode on the UG so that the display turns off when the engine is turned off, but that may not assure that the ECM is turning off properly.
As noted in my earlier post, in default mode configuration, the UG continued displaying several data streams even though the car was turned off, which I found unusual. I hoped the UG configuration to turn off the display took care of things, but this is something I'll need to confirm with an actual ignition off current draw measurement. Hopefully it was due to something else that was left on, but according to my friend, it wasn't the case.
Stay tuned, but be careful to monitor the battery levels in the specific case of the Mini.