Vida CEM swapping

Post by **charlie13** » 06 May 2022, 09:56

vtl wrote: 06 May 2022, 09:31

Thank you for help.
K line with dice.
Did I connect something wrong? Will someone suggest?

Power6 · Post by **Power6** » 06 May 2022, 12:23

I forgot to ask, and I may have this wrong...what is the CEM address on P3? I believe it's '726' from VIDA Logs and searching around. That doesn't seem to translate to 11 bit CAN ECU ID hex the way SPA does from 29 bit (CEM is 0x1A01, or 6657 in decimal).

Post by **vtl** » 06 May 2022, 12:24

Power6 wrote: 06 May 2022, 12:23 I forgot to ask, and I may have this wrong...what is the CEM address on P3? I believe it's '726' from VIDA Logs and searching around. That doesn't seem to translate to 11 bit CAN ECU ID hex the way SPA does from 29 bit (CEM is 0x1A01, or 6657 in decimal).

Yes. https://github.com/vtl/volvo-cem-cracke ... .ino#L1069

Power6 · Post by **Power6** » 06 May 2022, 13:16

Ahh yes thank you sir! I got it, but could have RTFM'd first

It's actually 0x726 then, 1830 in decimal. Volvo is not consistent at all in where they use decimal and hex for referring to ECUs. I'm clear now anyways.

Post by **RickHaleParker** » 06 May 2022, 14:41

vtl wrote: 06 May 2022, 09:07 I think someone reported he was able to talk to CEM using non-OBD CAN pins. They are open at all times.

Sirloin verified it. non-OBD CAN pins are open at all times.

Holtek · Post by **Holtek** » 08 May 2022, 13:06

charlie13 wrote: 06 May 2022, 09:56
vtl wrote: 06 May 2022, 09:31
Thank you for help.
K line with dice.
Did I connect something wrong? Will someone suggest?

This is correct:

Mattew99 · Post by **Mattew99** » 09 May 2022, 04:38

Hi,
I readed topic and on the first pages i found P1 flash coding info. Im looking for help converting coding CEM from P1 (V50) AW50 to manual and disabling DRL on flash dump. Maybe someone had info and can help?

Thanks VolvoLovers!

sherlock · Post by **sherlock** » 09 May 2022, 08:16

T5Luke wrote: 24 Apr 2021, 08:08 Anybody has Dice, CODE and likes to try?
Only tested 1 time on bench and it worked. CEM allows only 100 write cycles so i dont like to do endless tests.

There are some small things i need to fix, if tests work 3 times i will upload here for all...

Hello! can you share your tool?

Post by **charlie13** » 11 May 2022, 03:04

Is this correct K-line transmission?
Can anyone tell what is wrong?
It goes from teensy: 84 40 13 B2 F0 03 7C

However, this is what Vida says in the programming mode
Baud: 9600
Ready
C2
93 93 F0 D8 C4 A0 93 D2 F0 83 BC C3 93 A0 F2 F0
D8 C2 93 93 F0 D8 C4 A0 93 D2 F0 83 BC C3 93 A0
F2 F0 D8 C4 A0 93 D2 F0 83 BC C3 93 A0 F2 F0 D8
C2 93 93 F0 D8 C4 A0 93 D2 F0 83 BC C3 93 A0 F2
F0 D8 C2 93 93 F0 D8 C4 A0 93 D2 F0 83 BC C3 93
A0 F2 F0 D8 C4 A0 93 D2 F0 83 BC C3 93 A0 F2 F0
D8 C2 93 93 F0 D8 C4 A0 93 D2 F0 83 BC C3 93 A0
F2 F0 D8 C2 93 93 F0 D8 C4 A0 93 D2 F0 83 BC C3
93 A0 F2 F0 D8 C4 A0 93 D2 F0 83 BC C3 93 A0 F2
F0 D8 C2 93 93 F0 D8 C4 A0 93 D2 F0 83 BC C3 93
A0 F2 F0 D8 C2

matija0610 · Post by **matija0610** » 11 May 2022, 12:30

Mattew99 wrote: 09 May 2022, 04:38 Hi,
I readed topic and on the first pages i found P1 flash coding info. Im looking for help converting coding CEM from P1 (V50) AW50 to manual and disabling DRL on flash dump. Maybe someone had info and can help?

Thanks VolvoLovers!

hello, send me the .bin by mail.(PM)