[Solved] PCMTuner software Unable to Use Selected Interface J2534
Question: What’s this message of pcmtuner ? this error appeared. ‘Unable to Use Selected Interface J2534 Scanmatik -SM2 USB’ Solution: The fact your interface hung means there was an issue. Clear everything and have a tidy place to work with just ECU and LAPTOP. Disconnect everything. Restart laoptop. Turn on/off pcmtuner power . Restart pcm-flash. Redo all connections SLOWLY and recheck. Then try to read. You do not need a battery just use a power supply. EXTRA POWER is not the answer for not reading.