Virtual EEprom in Flash EDC16

by **julianstefanov** » Wed Jul 31, 2013 5:50 pm

Hello guys,

I have some kind of drama :)
Must remove dpf on sprinter with edc16 c32 with M58BW016xB. I read the external flash BDM with XProg-M and all was fine. Then I removed the dpf switches and so on. I write back the M58BW016xB with the modified file and the car don't want to start anymore.
Then I remember that I forgot to fix the checksums, so I opened the modified bdm dump with WinOLS and a strange (first time see) message appear that navigate me to the following address: http://www.evc.de/en/service/q1608.asp
So as I understand, probably I'll have immo problem or checksum problem. Tomorrow I'll read the car to see the immo state, then I'll reupload the fixed checksums dump to the car, but I got 2 questions.
1. What peoples mean when they said "If the checksums are not OK, you'll brick the ECU"?
Is that means that if I "brick the ECU" and after that I rewrite the original dump, it will stay bricked forever?
2. Is there someone who can give me some tips about that 'Virtual EEprom" where the immo data is stored and how can I change the maps and switches in the dump without mismatch the virtual eeprom data?

Thanks in advance!

by **julianstefanov** » Wed Jul 31, 2013 7:26 pm

I think I understand the logic about the second of my questions.
I think that if I want to do it without any problems, I must read full BDM, then modify the maps, correct checksum, write back to the ECU and all will be fine.
But if I read the full BDM, then mount the ecu back in the car and someone started the engine, then I get back the ecu and write back the 1st file modified, the car wont start, because it was started once or twice or more before I write back the modified original file.

So now only the 1st of my questions are not clear for me. What means bricked ECU by wrong checksum?

by **julianstefanov** » Thu Aug 01, 2013 7:13 pm

All is fine now!
I started the Sprinter today, then I modified the dump manualy with WinOLS and all is fine! No more DPF problems and all is working like a charm!

As for my 1st question, I got the answer now :)
The Brick ECU doesn't mean that the ECU won't start anymore anytime.

I answered all of my questions myself and also removed DPF on that Sprinter, so topic can be closed now :)