Long vin and short vin have checksum, must be recalculate after change

What programmer you use for cas4?

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how do u recalculate checksum/

I give you example: cksum test.txt 4038471504 75 test.txt. where 4038471504 represents the checksum value and 75 represents the file size of test.txt.
I'm working to cas4 dump editor ,when it will be ready,i will show you picture or video. It will not be free,only for the autohex team to be implemented if they want to do this,if not .........that is. 🙂

I'm done with the decryption process for cas4, who needs isn from dump, give me the dump from cas4 and i'll give you isn. Is the same in ecu and gearbox. When the cas is broken,put another second hand,read isn from ecu with autohex obd or bootmode,modify vin,isn,and km in cas,make new key, coding and programing with autohex,and the car is starting. No need to reset ews 8hp. This solution is good when engine ecu is dead and put another second hand.