i know that i can use the VolvoSynchro V1.4 to get my cem aligned with my ECM

VolvoSynchro ver1.4 doesn't work. It can set 10 synchronization bytes, but doesn't give You the eleventh byte,
which together with 10 synchronization bytes allows to start the engine.
Without correct 11th byte value ...

5- SerialBDM programmer works with Arduino Uno as well

6- Whole CEM flash memory dump writing takes about 6 minutes
.
SerialBDM@Kaev__write_whole_dump.jpg
.
7- Most important - for the SerialBDM programmer to work properly you need to open the Arduino IDE,
upload the sketch to the Arduino ...

After many, many attempts, finally connection was established and I can confirm that
SerialBDM programmer works ! This program brought one of the dead CEM back to life after a failed writting

My observations:

1- You can erase / write specific blocks in flash memory as it shows below ...

Treur wrote: 28 Apr 2025, 03:47 Check connection, it's working

Weird, because Nano I use works perfectly with others projects, but not with SerialBDM.
Connection stays the same, and there is no issues with transmission.
I pluged another usb cable, the same result...
Any idea?

CEM free BDM programmer - https://volvo-tech.com/en/793-2/

I tried this project. It didn't work with CEM-B 8688434 . Still the same response : it can't permanently open com port.
If I missing something, I didn't figure out what is it.. till now
It would be the simplest CEM programmer, ever seen ...

CEMTool is , let's say, incomplete and in that state won't work. But it can be fixed by using two subprograms.
Car must be sent into programming mode and then click "Program" button in CEMTool's window.
After writing car must be pulled to normal mode, by sending reset commands.

According to a post below
https://www.matthewsvolvosite.com/forums/viewtopic.php?p=609357#p609357

I can confirm that T5Luke's method works. Tested with Arduino Uno and Nano. Both read CEM flash without errors. Because CEM cracker still doesn't crack Brick CEMs so...
I tried it on three brick shape ...

@vtl

If we need a Teensy with fast clocks to detect CAN line jitter and side channel brute force the pin for CEM. How can VDASH do the same with a simple Mongoose JLR?

MY2006+ supports UDS.


Earlier versions of CEM we need to send to Vdash office , so they desolder flash or use probing ...

Pasek wrote: 06 Nov 2024, 13:21 I bought D5T5 Super J2534 some time ago and was wondering if it's possible to make it work witth UDSread or CEM Tool?

Nie ma takiej możliwości, te programy działają tylko z DiCE. There is no such possibility, these programs work only with DiCE.

T5Luke wrote: 09 Sep 2022, 17:26 This works on all CEMs to MY 2004, 10th place of VIN Y, 1, 2, 3 or 4. Read cem by arduino once, place it back into car and change how often you like by dice.

This above is what Luke said...so my V70 (Y in VIN - year 2000, MY2001 ) should be ok to use CEMTool