Simos PCR 2.1 Edit VIN MANUALLY

[gueeros]

Hi everyone!

I need to replace the VIN of a Simos PCR 2.1. If I open the EEPROM dump, I can see the VIN number in hexadecimal in three places. The idea is to replace that three VIN by the new VIN, of course in hexadecimal. The questions are:

- That's all?
- Are there any bytes in the file that depend on the VIN combined with some immo data or something like that?
- Any CRC checksum? As far as I have found, this is only necessary when modifying the mileage.
- Has anyone tried this and been successful?

Thank you very much in advance!!

[Ct10dst]

if you want to clone the ecu is not enought to change only the vin you need to change also mac cs powerclass pin etc if you know how to decript this then you can edit it yourself if not i can clone it

[gueeros]

I don't need to clone. Just change the VIN. I installed Julie with success, decrypting immo data with VAG DUMP TOOL only by eeprom. The blue LED blinking code of Julie shows success. I changed the mileage of the second hand ECU + CRC with VAG DUMP TOOL. Now it's have the same mileage of the dashboard. The HW, SW, Powerclass, engine code CAYC and SW version number all are the same of the stock ECU. And also I've done a backup with VCDS of the coding and adaptations of the stock ECU. I will copy it on the second hand ECU.
I'm a newby and I want to test chiptuning on my car with a second hand ECUs, without any modification or touching the stock ECU, dashboard... And for that reason I need to change the VIN on the second hand ECU in order to avoid to loose the ABS coding or whatever. I have VCDS and I seen calculators for generate ABS coding given ECU VIN, brake sizes... But I prefer to avoid that. I'm going to learn more about that later.