cas3+ isn coding with avdi

[caliskan71]

Hi experts

I need help for cas3+ isn coding for used ecu.
in dme have 16 byte isn (sk) cas3+ 16 byte too and 8 byte extra,when I read both isn its not matched (its in 1.jpg)
I insert dme isn to cas3+ 16 byte (2.jpg) ,but I dont know 8 byte in cas3+ ??
what is method of isn match in this type ecus please ?
I make immo off in dme car started without match ,but I want to learn valid method please share

418556418557

[dijo]

Hi, first image is SK encrypted...
second image you have SK decrypted...
and w/o ISN in EGS
Post here your Cas dump to see what is going on...

[caliskan71]

Hello Dijo

I dont read cas,btw: in second image I was put same 16 bytes from dme to cas..but I dont know 8 byte..I know last 4 byte from dme synchronize..but I dont now how can calculate ? can you pm me for method ?

[bearheroes]

To your system
4 bytes are only for egs.
Nothing more.
Car will start if you write properly 128bit isn to cas.
Abrites works perfect to this, so you probably have made mistake somewhere...


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[caliskan71]

Thanks Bearheroes

if I understood good

method is

1. read isn from dme 16 byte
2. read isn cas 16 byte + 8 byte
3. decrypt / but cas isn is different
4. put dme isn to cas 16 byte (no need touch 8 byte)
5. make synchronize

is it right ? confirm please

[bearheroes]

Isn in cas is 16 and 4... :)
Do you have car now with you?
If yes send me tv


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[caliskan71]

thanks for help but car goes 3 days ago,I maked immo off..but I want to learn know-how ?
in dme 16 byte isn like other olders ?
read dme and put cas ? is it right ? if yes what is my wrong in my steps ?

[dijo]

I dont know how AVDI works with CAS3+ dump encrypted... (dont use AVDI)
But if you want to write SK on Cas3+ dump, you need to decrypt dump first then you can write!

[caliskan71]

Thanks for all helps..I m waiting next car for some plays