Calling on Electronics Wisemen

[LethalEagle]

What are the yellow jumpers or diodes by the caps in the photo... The previous owner was charged for a new ECU. Guess what, they got owned. My good luck is that I got an ECU with an eprom . I just don't like the looks of the board or the reworked electronics on it. I realize what the caps are, I've replaced them on ECUs before. I just don't know what the other parts are. I haven't seen these in any of the ECUs I've looked at. There is also some type of jumper soldered to the back side of the board, around the caps area. If any one could clear this up for me I would greatly appreciate it. I planned on getting a keydriver chip for it, but I didn't want to put it on a board that may be trashed.... The ECU seems to work, for now. The car runs OK.

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[DevilSperm]

i cant answer your question but that board looks like its been rode HARD

 

[LethalEagle]

i cant answer your question but that board looks like its been rode HARD

That's what I thought also.. And I was told, these people got charged enough for a new factory ECU.

 

[NOSNUSE]

I know enough about electronics to know that you should start looking for a new ECU man, I hate to be the one to tell you that.



p.s. I believe those are 2 prong transistors

 

[LightningGSX]

Those are capacitors, the board is trashed, they used those caps to replace the surface mount ones the oem uses.One of the worst hack jobs I have seen.

 

[LethalEagle]

Those are capacitors, the board is trashed, they used those caps to replace the surface mount ones the oem uses.One of the worst hack jobs I have seen.

What?? The caps are blue in the photo... I'm asking about the yellow parts.
2 prong transistors, I may believe, but why are they there would be the question?

 

[NOSNUSE]

I would say that they where trying to fix an unknow problem with the ECU, may it is for a N/T car or something along those line and they read somewhere that doing this would fix it, or maybe they are suppose to be there, sorry I can't give you a better answer than that.

 

[LethalEagle]

I would say that they where trying to fix an unknow problem with the ECU, may it is for a N/T car or something along those line and they read somewhere that doing this would fix it, or maybe they are suppose to be there, sorry I can't give you a better answer than that.

That sounds possible. Atleast you made an attempt... That's all I ask.
Thank you NOSNUSE...

 

[Mack]

What?? The caps are blue in the photo... I'm asking about the yellow parts.
2 prong transistors, I may believe, but why are they there would be the question?

I agree, those are caps. They come in all shapes sizes and pakages. The blue are electrolitic or polarized, the yellow are ceramic (or another material) and are not polarized. Terrible job soldering/cleaing up oxidation as stated before, but if done correctly SHOULD be okay. That's if they used the correct replacement value.....I could talk all day about this. This site is mainly about car audio, but good reading nevertheless... http://www.bcae1.com/

 

[LethalEagle]

Sounds good to me Mack.... and thanks LightningGSX, but why in the world would they solder in two different types of caps? I guess I will drive with this ECU for a while and see how it holds up on the datalogger, before I put a Keydriver chip in.
Thanks for the audio site too..... Looks like I have a lot of new reading to do.

WOW! That is an awesome electronics site......

 

[LightningGSX]

If you look at a normal ECU, there are tiny surface mount ceramic caps mounted to the board in those locations.When the electrolytic caps leak, the electrolyte usually dissolves the copper those smaller caps are soldered to.So they just replaced them with non surface mount through-hole ceramic caps, its a common practice when fixing our ECUs.As long as the electrolyte was properly cleaned up, and the new caps were soldered properly, it should hold up.They reason why I said it was a hack job, was because the leads were left too long, those caps are for noise purposes, and the long leads can radiate noise themselves.

 

[LethalEagle]

Did I miss it LightningGSX or did you not say why they have both kinds of caps soldered in.
Thanks again for all your input.

 

[LightningGSX]

There are 2 different kinds of yellow ceramic caps it there? From the pic, all 3 look to be the same.

 

[LethalEagle]

There are 2 different kinds of yellow ceramic caps it there? From the pic, all 3 look to be the same.

No.. I meant, why do they have the electrolyte(blue) and the yellow caps?

 

[LethalEagle]

Ahhhh... Now I think I've got it. Sorry for the confusion.
You meant the yellow ones replace the damaged caps. The pieces that look like the ones next to the R45 or the D113 on the photo.