Jpdiag

Hi, I’m trying to connect to my Vespa Primavera 125 3V (2014) but I cannot establish communication with the ECU.

Setup:
- Interface: KKL cable with FTDI FT232RL (chip confirmed)
- Adapter: FIAT 3-pin → OBD with 12V and GND cables
- +12V connected from battery
- Ground connected to battery negative ...