Repairing a Burnt out ECU

[sarky]

Hi Guys

General Question is there anyone in this forum who repairs burnt out ECUs ?

Thanks

Sarky

[grinovsky]

it's hard to repair an ECU St
how we will repair burn ECU?with anti-inflammatory bands?

[sarky]

nice comment, but was looking for something bit more technical..

BTW Burnt = Electricaly fried not physical burnt

[cqae]

depends on what is burnt...........I replace components as required when available

[the_riddler]

nice comment, but was looking for something bit more technical..

BTW Burnt = Electricaly fried not physical burnt

Genaraly easier to remove eproms etc from "Burnt" ECU
and place them into a good second Hand one.

[electromech]

I have no clue how to repair a burnt ecu but my local ecu repair guy assures me that he can fix any burnt ecu even if the middle tracks are burnt so yes it must be 100% possible

[cqae]

depending on where the burns are, you can run thin wire instead of the copper tracks. have a look at my e46 ecu repair tutorial

[Mjolinor]

You do need to find why it burnt first but once that is done it is normally possible because generally burnt areas are because something outside the ECU went faulty so the burnt areas inside are normally buffered by passive components or transistors, lines don't often lead from outside directly into the micros or other big chips in there.

[alfabit]

I have an EMS3132 on my desk, I found a diode splitted out, no 5V on the main line, the ic`s are Infineon masked, what should I do ? Remove the prom, hoping it is ok, and the rest is for the trash can. I see no other way to repair it.
Btw, the copper board seems ok no burnt tracks outside, inside no one knows.

[Mjolinor]

I have an EMS3132 on my desk, I found a diode splitted out, no 5V on the main line, the ic`s are Infineon masked, what should I do ? Remove the prom, hoping it is ok, and the rest is for the trash can. I see no other way to repair it.
Btw, the copper board seems ok no burnt tracks outside, inside no one knows.

From here on in it is nothing to do with cars, it's just a matter of electronic diagnosis to determine why the diode desoldered itself or otherwise damaged. Trace where it is in the circuit, trace the 5 volt rail, see if the 2 are in some way related to each other. Draw the circuit and repair it.

If it isn't something your familiar with then take it to a TV shop or anywhere that does component level repair. A local college may be a good place to start, you need a geek that sees it as a challenge.

It's the same methods whether it is an ECU, a laptop, a motherboard or a TV.

[alfabit]

If it isn't something your familiar with then take it to a TV shop or anywhere that does component level repair. A local college may be a good place to start, you need a geek that sees it as a challenge.

I have more than 15 years expertise in repairing all kind of electronics, in that ecm there are 4 ic on the top side, the mcu and the prom on the bottom side and a bunch of diodes ( diodes are good ). That ecm took a reverse polarity main and this is all. Replacing all, one-by-one the ic it seems to be the only way but I do not know their type, their are masked by the manufacturer.
Other solution than sending me to a TV repair shop ?

[cammy25]

with your experience you should know at least the function of the IC just looking to it.
First you need to measure as much as you can ,then you try to replace most logically broken components.
Burned ecu's are tricky. I have had some where only some traces are burned and not any IC damaged. BUT i also have had ecu's where 50% of components were damaged.

[alfabit]

with your experience you should know at least the function of the IC just looking to it.
First you need to measure as much as you can ,then you try to replace most logically broken components.
Burned ecu's are tricky. I have had some where only some traces are burned and not any IC damaged. BUT i also have had ecu's where 50% of components were damaged.

Than looking at that thing, it would have been simpler to change all the suspect parts ( no copper nets burned ), but belive me, one can`t find spare parts for that ecm. Why do you think they masked them ?
I will save the prom and put in other ecm from a broken car, it is the cheaper solution, I make money not from repairing no-hope-broken-ecm and I have no much time to stay and looking at it. Hope the prom is ok.