How to Find Passat B6 7 byte CS code wtih FVDI 2018

Here’s the guide to find the 7th byte component security (CS) code in the Passat B6 comfort module.  To perform this operation with FVDI 2018, you need to use proper software. This is impossible if use inappropriate software.

Credit to Mr. Dan Costea.

Preparation:

Read original EEPROM 95320 from comfort module and save.

fvdi-2018-7th-byte-cs-1 fvdi-2018-7th-byte-cs-1
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First Attempt:

Select VW software->V24.0->Special Function->Dump Tool->Comfort module component protection data (Passat B6)

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Load original EEP dump (tried older EEP read on Aug. 17th, 2019)

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Press OK to load dump

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FVDI gave error “Cannot decode the comfort module dump. Probably the entered component security is incorrect”

fvdi-2018-7th-byte-cs-9

Second Attempt:

This time select VVDI2 software
If system prompts connecting to server failed, just ignore by press Close button
Select VAG V1.2.2 software
fvdi-2018-7th-byte-cs-10

System display error Windows cannot find VAGLoader.exe.

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Third Attempt:

Select VW software->V24.0->Special Function->Dump Tool->Comfort module component protection data (Passat B6)
This time try new dump read on Sep. 23rd, 2019
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Fail to calculate 7th byte CS again.  Cannot decode the comfort module dump either.

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Final Attempt:

Close FVDI 2018 Software and run it again.
select VVDI2 software, VAG V1.2.2

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this time the VAGLoader launches successfully
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Select Passat B6 Comfort Module component protection data (95320)

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Press Load File->Load newer EEPROM

Decrypt 95320 dump

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Try to Decrypt 95320 dump

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Find 7th byte CS code succeed.

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www.obd2tool.com

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