Unknown M696 Menu Screen

[wmacinty]

I've been doing some looking for a manual way to reset the Service indicator when I happened upon a new menu option.  If I hold the "Flash to pass" trigger and hold the "Mode" switch up, then turn the key on, it comes up with the following option.

000000 MOT

Then you can toggle from "Min" to Max" with the flash to pass trigger.

Any idea what this controls?