Vida CEM swapping

5ft24 · Post by **5ft24** » 29 Sep 2022, 06:57

The key info isn't stored in the CEM.

ZRimaZ · Post by **ZRimaZ** » 29 Sep 2022, 07:12

5ft24 wrote: 29 Sep 2022, 06:57 The key info isn't stored in the CEM.

You are wrong! Keys are stored only in cem. Depending on cem, it can be stored in 24f400 flash (in case of cem-b) or in eeprom for other cems

5ft24 · Post by **5ft24** » 29 Sep 2022, 08:39

I guess I was informed wrong by Volvo. I was told it's stored in the Immobilizer module

Divxet · Post by **Divxet** » 29 Sep 2022, 11:49

I cloned my cem and then my car key worked without problems so I assumed the information must be in the flash file I copied to the new cem.

5ft24 · Post by **5ft24** » 29 Sep 2022, 13:56

Cool. Much easier

liyezhu · Post by **liyezhu** » 30 Sep 2022, 07:56

hello everyone,
I can decrypt the CEM PIN of Volvo P3 within 5 minutes. Only the VIN code is required. Need to pay $20 and contact email [email protected]

oscilloscope · Post by **oscilloscope** » 04 Oct 2022, 14:06

folks , i'm slowing getting the parts together to make the cem cracker. i have the teesny. but i would like to use dip version of the CAN transceivers. so i can use it on a breadboard. for the first try out before having to figure out how to make a board with it all in one with a OBD connector.

i did see the MCP2561 from microchip which has a voltage range of 1.8 to 5.5v , which falls in the required voltage of the teensy output. ,
does it have to be the sn65hvd230dr ? or is that the best suited for the application. , now i also spotted a this
----> https://carlightbulb.com/products/cjmcu ... QoQAvD_BwE and wondered if that would work well ? they seem to have the resistors routed somewhere on them pre made boards. thanks in advance!

alevol · Post by **alevol** » 05 Oct 2022, 07:10

MCP2561 works ok if Vio provided

oscilloscope · Post by **oscilloscope** » 05 Oct 2022, 14:05

alevol wrote: 05 Oct 2022, 07:10 MCP2561 works ok if Vio provided

Vio approved? what does that mean?

5ft24 · Post by **5ft24** » 05 Oct 2022, 14:06

says provided... not approved