noob immob questions sorry me7

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dik-van-dub

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	noob immob questions sorry me7 « on: March 16, 2015, 05:38:52 PM »

i will appologise now just trying to get my head round immob defeats on vag me7 ecu's

i am using a clip on the epprom chip and can and write to it thats easy enough

my problem is the stage inbetween, i know you modifify 12 and 22 from 01 to 02

now i believe the checksum needs to be modified aswell (the last 4 digits of lines 10 and 20), how do i go about calculating these


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k0mpresd

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	Re: noob immob questions sorry me7 « Reply #1 on: March 16, 2015, 05:44:35 PM »

ffff - sum of octets.
fffe - sum of octets.

line is increased by one, so naturally chksum is lowered by 1.


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dik-van-dub

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	Re: noob immob questions sorry me7 « Reply #2 on: March 16, 2015, 05:54:40 PM »

so for eg i have
e7fc
e6fc
i should replace these with
e7fb
e6fb

is this correct


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ddillenger

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	Re: noob immob questions sorry me7 « Reply #3 on: March 16, 2015, 06:07:05 PM »

E7 FC
E6 FC

Becomes

E6 FC
E5 FC


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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!

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dik-van-dub

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	Re: noob immob questions sorry me7 « Reply #4 on: March 17, 2015, 11:14:34 AM »

thanks for that, hope you dont mind but i will post my one when i do it to make sure its correct


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