New feedback today: PCMTuner read and write DQ250C gearbox via OBD successfully. Manual StageX tune.
It is a 2010 CBAB, mecatronic unit 2005 (TCU much better insead AT/AJ)
Read/write true via obd2.
OBD is only a flash file, you can only read EEPROM from the bench if doing a TCU cloning.