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How I unbricked CMU in my Mazda - Царапающий лбом скрижали времён — LiveJournal
Mostly Harmless
How I unbricked CMU in my Mazda
57 comments or Leave a comment
yms From: yms Date: October 22nd, 2017 10:16 pm (UTC) (Link)
Somewhere in the end of the config section, about offset 0x7E5C30 of the ROM, and probably in some other place wherever I found it (searchable in the editor).
From: (Anonymous) Date: October 23rd, 2017 08:51 pm (UTC) (Link)
Thank you for your quick answer.

Now i think i got everything, i found it on two places in the ROM File and changed the bootstrap, ibc2 and fail-safe partition.

All i have to do now, is to bring it back on the UNIT.

I really have to say THANK YOU for your explainings. I made every step and i hope that in a few days my car will be fixed =)

U saved me a lot of money!
I really have to say THANK YOU again :D

yms From: yms Date: October 23rd, 2017 09:27 pm (UTC) (Link)
I hope you'll put the ROM back and the unit will start successfully.
It's always pleasant to know it helped somebody!
From: (Anonymous) Date: October 27th, 2017 10:15 pm (UTC) (Link)
SUCSESS, the CMU is booting now without any problems. U made a great job to set up the instructions here!
yms From: yms Date: October 28th, 2017 05:48 am (UTC) (Link)
Wow, congratulations!! I'm glad as much as I was when I unbricked my own unit :)
From: (Anonymous) Date: November 18th, 2017 10:53 am (UTC) (Link)
Now after i few days, i updated to new firmware 59. ... and installed Android Auto, that is really great!
yms From: yms Date: November 18th, 2017 10:06 pm (UTC) (Link)
Congrats :)
I didn't succeed with Android Auto, maybe I'll retry later.
From: Maco Meza Date: April 13th, 2019 07:38 am (UTC) (Link)

Tutorial on how to reflash

Do anyone who has succeded on reflash his/her CMU could share a youtube video on how to do it?
From: (Anonymous) Date: March 8th, 2018 06:23 pm (UTC) (Link)


what is the zip password to extract?
yms From: yms Date: March 8th, 2018 07:29 pm (UTC) (Link)

Re: password

See here the answer #10.

Edited at 2018-03-08 07:30 pm (UTC)
From: (Anonymous) Date: March 9th, 2018 07:35 pm (UTC) (Link)

Re: password

You are really Great! thx so much.
From: (Anonymous) Date: March 23rd, 2018 08:13 am (UTC) (Link)

Re: password

you said:
There was some doubt whether I should change the byte at 0x10000 address ("boot-select") from FF (boot the main system from ibc1) to 00 (boot failsafe from ibc2 to start upgrade from the USB drive).

did you mean change from 0x10000 till 0x1ffff all as 00 ?
I checked bootstrap, ıbc2 and failsafe but didn't work.
you said I flashed it. what is the "flash" how did you do that?

I'm doing something wrong. maybe you can help me to find it.

yms From: yms Date: March 24th, 2018 05:56 am (UTC) (Link)

Re: password

I mean "ONE byte at 0x10000". The rest of the bytes should remain FF. But I didn't try actually to set it to 00.
By "I flashed the chip" I mean "I filled the chip memory using the programmer device, clicking the Write (or Program) button in the software".
From: (Anonymous) Date: March 24th, 2018 12:17 pm (UTC) (Link)

Re: password

ı did it. :) really thx. my system working now. you are right it dont necessary to change ff to 00 at 0x10000. just ı change bootstrap partion with failsafe bootstrap e0000000002.dat. I check that failsafe and ıbc2 same with firmware and didnt change anything.

I understand that e0000000001.dat for update mode e0000000002.dat for normal mode at bootstrap partion.

anyway. I saved my system and so my Money :) thank you again for advices.
yms From: yms Date: March 24th, 2018 04:32 pm (UTC) (Link)

Re: password

you're welcome :)

Edited at 2018-04-16 08:31 pm (UTC)
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