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Author Topic: Help to write MTM 4B0906018AL  (Read 797 times)
HR-Performance
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« on: January 08, 2021, 06:09:12 AM »

So im completly new to this Game.
i have my First A4 B5 1.8T Engine Control Unit and it already got a Stage 1 from MTM.
I was able to read the ECU via MPPS but i wasnt able to write.
I opend the ECU and i found the small circuit Board ontop of it.

I know that the small Atmel 12pin under the circuit board is for the encryption.
now i would like to know if i can just desolder the MTM Cicuit Board and the "AM29F400BB"
Shoud i buy a new EEPROM or can i solder the one from the MTM Board on the ecu?
and also, i shoud be able to write the MTM File on the "Stock" EEPROM?
I just wanna make shure that the car is running with this file before i write my own Files.

Thanks!
i cant upload images.. i got errors.

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Audi S4 B5 2.7 AGB FL
Audi A4 B5 1.8T ANB FL
bamofo
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« Reply #1 on: January 08, 2021, 06:21:28 AM »

You can take it out and solder it back on the board. The mtm tune “may” have something written in it to link it to your eeprom so before you do anything make a full backup of the eeprom and rom. However if you read it with mpps and you can read the file then it doesn’t even have a no read in it. You can pm me I’ll check for you.

Short answer. Yes take the chip out and put it back on the board.
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HR-Performance
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« Reply #2 on: January 09, 2021, 12:30:01 PM »

PM is send!
Thanks!
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Audi A4 B5 1.8T ANB FL
nyet
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« Reply #3 on: January 09, 2021, 03:41:54 PM »

You will still need to use bootmode to write to the existing flash (or a new, erased flash)
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ME7.1 tuning guide (READ FIRST)
ECUx Plot
ME7Sum checksum checker/corrrector for ME7.x

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Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience.
HR-Performance
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« Reply #4 on: January 15, 2021, 10:36:46 AM »

So i desoldered the MTM Board. Old Flash is on. But i cant get in the ECU. I try to get id via MPPS but no answer.
Did i kill the Flash? I see no broken IC`s  or anything.
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Audi S4 B5 2.7 AGB FL
Audi A4 B5 1.8T ANB FL
tjwasiak
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« Reply #5 on: January 15, 2021, 11:21:13 AM »

You need to reprogram in boot mode as flash without daughterboard is not readable by the ECU.
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HR-Performance
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« Reply #6 on: January 15, 2021, 12:20:14 PM »

i tried to do it in boot mode, but i still get no answer.
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Audi S4 B5 2.7 AGB FL
Audi A4 B5 1.8T ANB FL
tjwasiak
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« Reply #7 on: January 15, 2021, 04:29:18 PM »

If you have programmer you can desolder, program outside of the ECU and resolder it.
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HR-Performance
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« Reply #8 on: January 16, 2021, 06:50:35 AM »

it was just my mistake, i didnt set mpps in bootmode. Car is running.
Thanks!
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Audi S4 B5 2.7 AGB FL
Audi A4 B5 1.8T ANB FL
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