PCMtuner ECU Programmer read, write and clone Audi a4 transmission TCU VL300 successfully.
Using Module 58 bsl mode.
Pcm tuner is ok on these, but tcu ONLY has boot mode for cloning.
Module 58 VL300 01J boot pinout
Always drill hole big enough to make sure you can connect resistor. Otherwise will fail to read eeprom and flash.