What's that? Right from the ECM

gemini25

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Hallo,
sorry to ask you. But knows anybody, what this is? It is right from the ECM and it isn't connected to anything. I mean this thing with the serial number MFR-.....???
Thank you
 

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gemini25

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Thank you. Interference filter for what? To protect the ECM? My ECM is dead, because of an internal shortcut from the batteries.
I know interference filter with AC current, but not with DC current.
Does anybody has the serial number? Then I would try to find a technical data sheet.
 

gemini25

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Sorry, that is not correct. My ECM is in a repair shop an the internal power supply is damaged, not the battery. And this happened as one of my 12V batteries had an internal shortcut.
 

spankybear

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Sorry, that is not correct. My ECM is in a repair shop an the internal power supply is damaged, not the battery. And this happened as one of my 12V batteries had an internal shortcut.
I would think an internal short in the battery would just cause the battery to drain and go to zero volts. How did it mess up the ECU?
 

coachgeo

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North of Cincy OH
I would think an internal short in the battery would just cause the battery to drain and go to zero volts. How did it mess up the ECU?
jumping truck with a short in battery is maybe what the guy was referring too the burn up of the power supply??? or the fellow is blowing smoke up gemini25 arse..... like a mechanic selling a blond a new transmission saying " if she hand not let it get low on anti seize fluid she would not have broke it"
 

spankybear

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jumping truck with a short in battery is maybe what the guy was referring too the burn up of the power supply??? or the fellow is blowing smoke up gemini25 arse..... like a mechanic selling a blond a new transmission saying " if she hand not let it get low on anti seize fluid she would not have broke it"
While jump starting does have the potential to send a voltage spike down the system, I don't think internally shorted batteries would cause this type of damage. Then again strange things can happen.

If the ECU can't handle a voltage spike the engineer who designed it was a HACK. There are many thasounds of ECUs out there that get Jump started all of the time. You just don't see them dead after a jump..
 

Ronmar

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They can repair an internal power supply but they cannot change the battery on an ECM?
yes, the designers were hacks... they used a volatile memory that would kill the ECU when the memory battery died(Lot of money in proprietary parts)... Supposedly cat changed this design...
 

spankybear

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I think this is the battery for the ECU... But not sure. I don't have an ECU in my leaky truck but if I did I would find a way to replace the battery. There should be a way to replace without losing memory.
 

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gemini25

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So, I send my ECM to a repair shop and they can repair it. They said the internal power supply is damaged.
Looks like I got a voltage spike from somewhere.

And now I come back to my first question. Can it be, that this piece right from the ECM it there to protect the ECM?
 
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