Hi All,

i'm a newby on your forum, and i saw that there are a lot of people friendly with OBDII and Car Buses.

I want to program, via an Arduino, and interface, a steering ECU(TRW) from a Renault CLIO II
it seems to be driven by ISO 9141-2 (Kind of 12V Asynchronous Serial protocol).

But i have never done that before,

maybe one of you knows how to start ?
what to put as header for communication ?
What are the PID for functions ?

Is there any possibility to ask to the ECU to list all the functions he have ?
If i get the Eeprom Hex, could we do something with that ?

Please, i look around on the internet all the day without finding something reliable.


Please let me know


Regards