NefMoto

Noob Zone => Noob Questions => Topic started by: dik-van-dub on March 16, 2015, 05:38:52 PM



Title: noob immob questions sorry me7
Post by: dik-van-dub 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


Title: Re: noob immob questions sorry me7
Post by: k0mpresd 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.


Title: Re: noob immob questions sorry me7
Post by: dik-van-dub 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


Title: Re: noob immob questions sorry me7
Post by: ddillenger on March 16, 2015, 06:07:05 PM
E7 FC
E6 FC

Becomes

E6 FC
E5 FC


Title: Re: noob immob questions sorry me7
Post by: dik-van-dub 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