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Vida CEM swapping

A mid-size luxury crossover SUV, the Volvo XC90 made its debut in 2002 at the Detroit Motor Show. Recognized for its safety, practicality, and comfort, the XC90 is a popular vehicle around the world. The XC90 proved to be very popular, and very good for Volvo's sales numbers, since its introduction in model year 2003 (North America). P2 platform.
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charlie13
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Re: Vida CEM swapping

Post by charlie13 »

vtl wrote: ↑06 May 2022, 09:31
Thank you for help.
K line with dice.
Did I connect something wrong? Will someone suggest?
Attachments
photo_2022-05-07_17-17-23.jpg
photo_2022-05-07_17-17-23.jpg (84.19 KiB) Viewed 1182 times
Last edited by charlie13 on 07 May 2022, 09:18, edited 1 time in total.
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Power6
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Post by Power6 »

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).
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vtl
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Post by vtl »

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
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Power6
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Post by Power6 »

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.
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RickHaleParker
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Post by RickHaleParker »

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.
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Holtek
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Post by Holtek »

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:
Attachments
CEM pinout.jpg
CEM pinout.jpg (233.09 KiB) Viewed 696 times
Last edited by Holtek on 30 Nov 2022, 14:40, edited 2 times in total.
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Mattew99
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Post by Mattew99 »

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! :)
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sherlock
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Post by sherlock »

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.

Image

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?
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charlie13
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Post by charlie13 »

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
Attachments
cem 8688513.txt
(66.06 KiB) Downloaded 122 times
CEM 8688513 test 2.txt
(65.98 KiB) Downloaded 115 times
cem P2b test5 (6).txt
(122.13 KiB) Downloaded 108 times
Last edited by charlie13 on 13 May 2022, 01:55, edited 2 times in total.
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matija0610
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Post by matija0610 »

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)
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