DDE 8 CAS3+ ISN security code help please

[Zaklberg]

Hi, long story short: original ECU eeprom corrupt, i have only full backup with KESS. I wrote to original ECU exact the same software(donor) but ISN in eeprom is different. After that i overwrote full_backup_kess, but ISN didnt change. I have CAS eeprom, ECU eeprom(new), original ISN code from CAS and key info - all in attachment. Can somobody write that ISN to ECU eeprom? If i do it manually, it doesnt work - i think you need checksum around 3 lines of ISN... I did also immo off in flash, but there are still fault codes and red light in dash. Please help.

Thank you
Al

[CarCity]

ISN: 3A3F0E196F088916BB1EDFBBE14DA9D5

[Zaklberg]

Thanks for reply, can i overwrite this ISN in ECU eeprom? What about checksum?

Al

[CarCity]

Yes you can write ISN to ECU

or

synch DME and CAS with VVDI 2

best regards

[Zaklberg]

Ok, i wrote ISN to ECU eeprom, but still gives me error 2E3B EWS manipulation. I also tried cas dde synchronisation with vvdi2, but it is not possible. Any other solution - maybe can you write ISN from ecu to CAS?

Thanks
Al

[kiszka]

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[Zaklberg]

Ok, original CAS eeprom and ECU eeprom with donor ISK.

Thanks
Al

[kiszka]

...............

[Zaklberg]

Thank you for helping, sir, but the folder is empty i think

Al

[bersch8688]

FVDI can do
Snycro ---> CAS and ECU

[doctore]

no need syncro on long isn and cannot duet

[Zaklberg]

I also think all i need is that ISN from my first post to be written in ECU eeprom. That should work - i copy ECU eeprom from another car into my ECU and put it into that car and it started - no ews manipulation(with a bunch of error codes...). I think problem is in eeprom checksum - ISN is repeated 3 times and aroud it are different bytes(i guess checksum).

Al

[kiszka]

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[dijo]

You have 2 option...
1-You change ISN in ECU dump and post here Ori dump and dump after written ISN...
2-You change ISN in Cas but you need to read "real page3" in your working key...