Ok, so I can confirm that the AX-TOY28SWC adapter works for my 2014 SR5P with stock navigation. Connected it to the OEM harness, and connected power and ground wires, then connected box from ASWC-1. Little disappointed in the controls gained though. Volume works, and the up and down buttons to scroll or move from folder to folder. And the mode button works. However, the right and left don't work at all, and the middle button or back buttons don't work. I was really hoping that this would work to go through folders on my USB card and search for songs easier, like with the stock setup.
So it works, just not to the extent I was hoping.
So it works, just not to the extent I was hoping.