I saw multiple times here people claiming that they can see the factory sensor that sits in the ATF through their OBDII dash device. Can anyone who is able to see that temperature chime in with what kind of device they have?

It doesn't appear that the ATF sensor shows up through the standard OBDII address space, so it might be an extended Toyota specific address.

 

Don't remember seeing this on my OBDII scanner but never really looked for it. I have an aftermarket gauge for that.

 

Scangauge II does this on 99-02 4runners, use coding:

TXD: 686AF101B4
RXF: 044105B40000
RXD: 2808
MTH: 00090005FFD8