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Appreciate it. As soon as I get the diagnostic cable, I’m giving it a go.

My dealer won’t do the iStep update (after being there twice and asking them specifically to do it to hopefully get rid of throttle hesitation) because “there isn’t a service bulletin”, so I’m pretty much set on doing this myself. Any gotcha’s or particular vehicle setup requirements? The ISTA...

Does anyone know if updating the firmware by yourself using the licensed TechStream and ISTA software with a certified Supra diagnostic cable will void the warranty? I can’t seem to get my dealer to do a firmware update and have had this issue several times; to the point I’m logging multiple...