Try to read Toyota revo year 2021 with Tactrix openport 2.0 and pcmtuner dongle. what’s the problem (I can read but not write). pcmflash says there was a problem preparing the selected file.
newer UDS protocol needed for Toyota 2020>>> cannot do on this version
Revo2020 use PCM Flash 1.2.1 or higher version
1.20 can not support 74 revo 2021.