Vida CEM swapping

Post by **vtl** » 03 Dec 2024, 05:43

Treur wrote: ↑03 Dec 2024, 05:17 So far I have only one idiotic idea in my head - to add the j2534 protocol to your cracker.

J2534 is pass-through, nothing fancy. I use it in a similar hw: https://github.com/vtl/volvo-ddd And there's a "teensy" branch. And the PCB https://oshwlab.com/v.mayatskih/volvo-ddd2_copy which looks somewhat similar to the cracker. Adding J2534 support is mostly writing a driver for OS of your choice.

Treur · Post by **Treur** » 03 Dec 2024, 06:13

vtl wrote: ↑03 Dec 2024, 05:43
Treur wrote: ↑03 Dec 2024, 05:17 So far I have only one idiotic idea in my head - to add the j2534 protocol to your cracker.
J2534 is pass-through, nothing fancy. I use it in a similar hw: https://github.com/vtl/volvo-ddd And there's a "teensy" branch. And the PCB https://oshwlab.com/v.mayatskih/volvo-ddd2_copy which looks somewhat similar to the cracker. Adding J2534 support is mostly writing a driver for OS of your choice.

J2534 is not just driver. The device must process driver commands.

But I don't think it's don't worth it. If we need a real PIN so much, we can use dice to find a PIN by UDS, download SBL, download flash and get it. The question is - why do we need it if we can already log in by UDS!?)))

P.S. How can I access this forum by PC? Cloudflare can't check me)))

rolkat5 · Post by **rolkat5** » 03 Dec 2024, 08:12

Hello everyone. I've got this Cem-B. 2003MY. But seems like this cem is little bit different and i cant find schematics where to solder wires. Can anyone help ?

Edit: nvm, i was in a rush and seems like i took a REM instead of CEM from junkyard

Treur · Post by **Treur** » 03 Dec 2024, 08:47

rolkat5 wrote: ↑03 Dec 2024, 08:12 Hello everyone. I've got this Cem-B. 2003MY. But seems like this cem is little bit different and i cant find schematics where to solder wires. Can anyone help ?

It's not CEM. REM)))

scaro · Post by **scaro** » 03 Dec 2024, 08:51

Is that really a Cem? isnt it Rem, could be that im wrong.

Anyway noticed that i needed to use win7 for UDStool(6byte). Now code show up correctly when writing it in prog. In my eager i even forgot to add 120ohm on canbus... added them. Cem clicks now but still cant read the file, it says "wrong code"
As i said before i havnt a clue if it should be possible to read it this way

Treur · Post by **Treur** » 03 Dec 2024, 09:48

IT IS REM! CEM is gray

scaro · Post by **scaro** » 03 Dec 2024, 10:10

Yes that what i say

danthe88 · Post by **danthe88** » 03 Dec 2024, 10:18

Guys, is there some diagram how to connect teensy to CEM 30765643 on the bench?

scaro · Post by **scaro** » 03 Dec 2024, 10:42

Its in this thread. Think its on side 298 or something. Havnt used exact that pinout but try it

danthe88 · Post by **danthe88** » 03 Dec 2024, 10:47

Thanks, I will look

Vida CEM swapping

Re: Vida CEM swapping