Our 1G ECU seems to have smoke traces in the middle on a little vertical board. Pictures included. Does anyone know if this matches common failure modes of either capacitors or similar? We honestly couldn't find any trace damage. Opinions?

See all those dark spots on the green trace by C108 and C44 then around C19 and IC6, that's all corrosion from the electrolytic capacitors leaking. And it looks like it crawled up the white/green ceramic hybrid IC next to them.

So I'm guessing you really don't know what to look for.

That's a 1993 MD193299 Federal MT AWD ECU board.

steve said:

See all those dark spots on the green trace by C108 and C44 then around C19 and IC6, that's all corrosion from the electrolytic capacitors leaking. And it looks like it crawled up the white/green ceramic hybrid IC next to them.

So I'm guessing you really don't know what to look for.

Click to expand...

Thanks, I appreciate the insight. We also have a socketed 1G ECU has a crack going straight across a trace and a more "schmoo" on the board than this one. Honestly those two are the first DSM ECUs I've opened up to look at.

My son was running this in his car until a month ago as I fixed a bunch of mechanical issues. I'll have him hunt for a new ECU.

I don't know what the current conditions are for shipping across the Border but the people at ECMTuning are first rate with ECU repairs. You might want to let them look at both.

I'll look downstairs are see if I have a good MD193299 just in case.