BCM2 EEPROM CRC calculation

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Matrosek

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	BCM2 EEPROM CRC calculation « on: April 03, 2023, 05:07:11 AM »

Hi all. I can’t figure out the algorithm for calculating the checksum in the encrypted data blocks of eeprom 95320 in the BCM2 block. There is an assumption that this is CRC16 with polynomial 8005. But I can not decide on the initiating value. Perhaps the algorithm differs from the usual calculation of CRC16. Can anyone tell me the initial values of the CRC16 algorithm for BCM2 with 95320? Thank you.


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ASTROLIDER

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	Re: BCM2 EEPROM CRC calculation « Reply #1 on: May 02, 2023, 03:36:50 PM »

bcm2 what brand and model of car does it use?
and if you have a file of the 95320 to see the theme of the crc.


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Matrosek

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	Re: BCM2 EEPROM CRC calculation « Reply #2 on: May 03, 2023, 11:24:13 PM »

AUDI A4


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smotorsport

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	Re: BCM2 EEPROM CRC calculation « Reply #3 on: October 26, 2025, 04:18:25 PM »

Has anyone managed to find a solution to this? I have exactly the same question - how to calculate checksum of 95320 from audi bcm2. I have some files to compare and I know vvdi2 does it but since I dont have vvdi2 I'm looking for solution or another program...


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BlackT

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	Re: BCM2 EEPROM CRC calculation « Reply #4 on: October 27, 2025, 06:30:05 AM »

https://info.autokey.by/index.php?module=bcm


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