Oh yeah. lets not forget, there are several alternators, and at least 2 different BSD/LIN systems. If you get the wrong alternator...it may fit...but will never comm properly because it may be calibrated to talk to a different system. IBS never sets a fault code for affect to BSD unless its flat out...

last paragraph cut off? ahwell. If the ME cant handle all sensors plugged in, its not getting adequate ground OR its simply lost it. I replaced one DME this week, shorted oil level sensor wiped it out and made a hardcode. No other codes but BSD line down. Found fixed .7v on alternator line. Disconne...

I have fixed that fault. NOW, if you get a bit serial data failure code, 1st check would be the network line wherever easiest to grab on your given car. Alternator or coolant pump or radiator blinds depending on vehicle. Line for BSD starts at the ECM, when stable it will waver 8-10v on a scope or m...