Just got my ScanGauge in for the Lexus. Have had one for years on the Land Cruiser.
Hoping I can figure out how to access the Xcodes and come up with something that will provide me with Transmission Temperatures. Seems that is kind of 'hit or miss' depending upon year model and what codes are tried.
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View attachment 1687451
Hopefully this saves you some Googling time:
TXD – 686AF101B4
RXF – 044105B40000
RXD – 2808
MTH – 00090005FFD8 for deg Fahrenheit (000100010000 for deg Celsius)
I use this for my '99 and it works flawlessly.