Hi all!
I've built an OBD to SERIAL decoder using the schematics found on the ELM 320 Datasheet, i will link this to a pic by the serial port, but first i have to try it with a simple pc serial connection, i've a question for you before i proceed:

It's there a way to ruin the ECU of the car, if there's something wrong in the circut?
It's there a way to ruin the ECU of the car by the OBD port?

What do i have to check and re-check again before plugging the cable in the obd, and before i'll connect the ELM320 to the PC/PIC ?

Thank you!

Luca

P.S. I don't want to burn my ECU!!!