[Dusanr]

Hello all, I am new on this forum, and I need some help with Mazda 3 CMU. I have bricked my cmu when shutting power after installing failsafe file. I have succesfully unbrick CMU using information from this forum and some others, but now I am stuck with that black screen asking me to insert USB and update system. I have tried to use 70_00_100A EU version which I have on the USB, but it says it is not correct file. I have attached my succesfully modified rom, please could you tell me what version I should use to update cmu. Or can I upload to cmu this rom: rom-513B and then cmu would start in normal mode? Thank you for any help. Dusan

 

[Dusanr]

Problem solved with Alma12 help. Newest software installed. Thank you.

 

[Dusanr]

I have used CH341A programmer and uploaded new rom file supplied by Alama12 and then it was possible to finish installation of the new firmware. Working with CH341A programmer is not very easy, mostly because you have to connect 8 pins from 16 pin clip to 8 pins on the programmer, it was the first challenge, but you can find here on forum what pins from 16 pin clip connect to 8 pin connector and second one was to find correct fit of the clip on the chip, it took several tries. This is the best tutorial video

. In my case, it wasn't enough to replace that one line with nulls, it didn't help, I had to upload new rom file. If you need some more info, just reply to this post.