Is this ECU burned out?

[doobycareful]

Its my ECU from my 92 TSI, I am having problems starting it and I checked everything but the ECU so I took it out and here are some pics of it, I dont know is this good or burned out? if its bad how do i fix it or do i get a new one? where do i get a new one? thx

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[bling5tatus]

yeah, looks pretty toasted to me. mostly on the last picture too where you can see black... looks like something actually burnt. A lot of times that stuff can leak a little and be ok, but if it actually starts burning through traces on the board, you're boned.... it can probably be repaired but not by just anyone, you will need a specialist.

 

[Jst4Cyl]

Looks to be recovered from the Titanic........

 

[cbassgsx]

Maybe try to clean it with rubbing alcohol or acetone and a Qtip to see the extent of the damage.It may just need new caps.
Chris

 

[mtcs83]

Thats def toasted. I had the same problem. Just didnt look right and had a weird smell to it. You can buy one off ebay and it will be cheap since it isnt an EPROM.

 

[steve]

It may just need new caps.

It needs a bit more than new caps.
You can see a broken diode in the first and third picture along with sigificant corrosion damage to the ground trace and the pins of IC110.

 

[bling5tatus]

is the diode the little peach colored joint that looks like it's got a little bit of melting on the casing?

 

[cbassgsx]

The diode is the thing right beside the ic110 with the black case thats broken off. I didnt see that the first time I looked at it.If Steve says you got problems I'd hit up ebay or the classifieds here.
Chris

 

[bling5tatus]

hahaha oh, now I see, half of the case is laying on the board, yeah, I maybe wouldn't throw it away... I've done a lot of thinking and there will be a day when you won't be able to get an ecu for the ol beater dsm anymore and it will present an issue in which people will need to repair them. I'm sure that one can be fixed.... but it will take an electronics technician.

 

[steve]

The peach colored part is also a diode but a different type. It's a zener diode used to generate a 5v reference when the ECU is powered off.

 

[doobycareful]

what caused this? or the ECU caps went bad and did this. When I get a new one and plug it in will id burn out again? how should I check it to be sure it wont brun it when I plug it in? thx

 

[steve]

The corrosion is caused by the capacitors leaking. That is a generic defect with all 1G ECUs.
I can't guess what caused the diode damage.

Steve