A quick google search will also tell you it's full time AWD. Second result when searching "gr yaris full time awd"Any way to data log and pull voltage on the coupling during normal driving? That would a) validate that it’s full time and b) I’m curious how much it varies during normal driving to allow turning without bind (since it has to act as the center differential)
Wrote this on PH, took some time so thought I share it here too. Goes deeper than the quoted press pack and compares to other systems. From the press pack: “The full-time system is simple in design and light in weight – lighter than alternative twin- coupling or centre differential systems...
I don't fully understand it, but my initial understanding is that it replaces a center diff with multiple clutch packs that allow it to modulate front to pack power, so it can adjust on the fly, alongside the front and rear diffs, to allow wheels to spin slower or faster