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  #21  
Old 03-08-2020, 11:34 PM
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Quote:
Originally Posted by andrewwynn View Post
DME is paired. I don't recall the TCU needing coding but somebody hopefully will follow up. .

The damage you show is in inline with what I was prepared to see based on your errors. Can you see where there damaged trace/s go to put a jumper around them?
Nope. The damage is on the traces on the centre layer of PCB. after cleaning up the surface, I could see where the 'smoke' came out of it. Theres no point of attempting a repair because if one of the transistors shorted out, this break in the traces caused by over current protected the wiring/circuits further up the chain and would just open again. Very well could have been caused by a malfunctioning solenoid in the existing valve body, or just wear and tear over time.
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Last edited by aureliusmax; 03-09-2020 at 12:55 AM.
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  #22  
Old 03-08-2020, 11:43 PM
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I hate when the magic smoke comes out of something. Yeah repair of inner layer traces is next level. Keep us updated it will be very helpful to know if programming the module is required.
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  #23  
Old 03-09-2020, 12:41 AM
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Originally Posted by andrewwynn View Post
I hate when the magic smoke comes out of something. Yeah repair of inner layer traces is next level. Keep us updated it will be very helpful to know if programming the module is required.
I matched the first two serial numbers
0 260 002 812
7 512 653
on the bosch sticker to an item on ebay with a 6 month warranty. The price of $26.99 can't be beat.
Hopefully can test it out next weekend. I will be able to program it with ISTA-P if required.
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  #24  
Old 03-09-2020, 12:41 AM
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And see if you can figure out WHY the smoke leaked out. If there's a fault in the loom etc. then you'll fry the new EGS module when you fire it up, you could end up with a matching pair of dead EGS modules.
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  #25  
Old 03-09-2020, 12:42 AM
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Looked like water ingress. I thought I saw copper corrosion


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  #26  
Old 03-09-2020, 12:55 AM
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Originally Posted by andrewwynn View Post
Looked like water ingress. I thought I saw copper corrosion


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Verdigris - yep.

Just so long as that is all it was. I suppose if it gets bad enough, verdigris can cause quite large fault currents... hence the smoke...
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  #27  
Old 03-09-2020, 12:59 AM
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And see if you can figure out WHY the smoke leaked out. If there's a fault in the loom etc. then you'll fry the new EGS module when you fire it up, you could end up with a matching pair of dead EGS modules.
Not a chance. If you carefully read my posts you would have seen the data that shows there's no faults where you're looking.

andrewwynn - there's no corrosion you're seeing. after cleaning that off, i could see the split in the PCB where the 'smoke' left that scale. There's no sign at all of water ingress on that module.
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  #28  
Old 03-09-2020, 06:19 AM
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I used the generic term because I speak English. I often call the DME the ECU also.
I think that there will be less confusion if the term used by BMW is used in the reply.
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  #29  
Old 03-09-2020, 11:16 AM
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Is the blown trace in pin 21? You said it had no power and seems to run everything. Maybe a short on the old valve body sucked out the smoke.
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  #30  
Old 03-09-2020, 02:59 PM
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Originally Posted by andrewwynn View Post


I used the generic term because I speak English. I often call the DME the ECU also.
TCU in "BMW language" means the Telematic Control Unit. The Telematic Control Unit is completely different from the Electronic Gear Shift (EGS) module
in a BMW.

https://www.youcanic.com/wiki/bmw-tc...c-control-unit
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PORSCHE 911 Targa 1982 The Garage Queen
Audi Avant donated to Kars for Kids
BMW 525IT Sold
Audi 4000CS Quattro Sold
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Triumph Spitfire 1971 Sold
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