I know that pin E and M on the aldl port are the output for the ECM. and the voltage varies depending on what data is being send out.. But can someone hook up a voltage meter to pin E and\or pin M and tell me the voltage with the car running? thanks..

 

I figured someone on the diy-prom board might already have this information?

If it doesn't get answered I have a feeling craig moates might know it off hand

 

I don't remember what pin it is, but if you're talking about the data line, it's 5V TTL. I think the standard is below .3v is a 0 and above 3.8v is a 1.