I bought a OBD2 Bluetooth scanner online. However, when I connect it to the OBD2 port in the car, the app while connecting to the OBD2 scanner gives an error message that it cannot connect to the cars ECU. I do not have the engine light on but would like to check whether the scanner works or the ECU is not bad.
Please find the attached image of the protocols the device supports.
Could anyone let me know where the issue lies? I thought the ECU fuse may have gone.
Thanks & Best Regards