Finally i get the CHK right! This probally just a part of file since it comes from TIS to web but that have dosen`t mather;-) After i have cheked around all GM files actually have chk 0000 calculated over all data so normally you calculate chk by do big endian 16bit or litele endian 16 bit exept 2 f...

Tazzi wrote:

teknik@speedparts.se wrote: Oki strange they use it for this cars The TechII calculate it.

Is it used at any point for updates or programming sequences with GMs online techline?

GM online techline i don`t know what it is. The seed/key is used when you re config ESP unit. Se can logg.

Well that's interesting. GMs own documentation says it's for manufacturing. This is the requestSeed level for enabling vehicle manufacturing specific device control restrictions (as opposed to having service device control restrictions enabled). Sounds like someone needs to get into one of those Te...

Gatecrasher wrote:27 03 is DVT access. Those were only ever used internally at GM, so I don't think the algos ever got out in the wild.

Oki strange they use it for this cars The TechII calculate it.

Hi,

Anyone can do chk for this ? search area en method of CHK

Hi,

I have problems with a seed/key for Saab and Opel ESP unit models around 2008. I have 2 pairs but can`t find any algo match. Anyone that have this? Seed request is level 0x27 03

seed 0x1E3A key 0xBDFF
seed 0xBB55 key 0x1890

If any one have something let me know

Regards Micke