KEAD 57K30 E

[visavis88]

Hello.

2025 Mazda CX5 Airbag Module KEAD-57K30-E with R7F701330A

I have trouble reading anything from it using Gprog_SE (MCU Info, OPBT0, Codeflash, DataFlash). The error is always "device is silent, header not received..." I removed capacitors one by one, always checking if it will read, same error. I've read the pdf guide multiple times, watch youtube video, and used the adaptors from your store. Maybe I'm using a wrong adapter, or need a power supply connected? I use pin 8 of the cable as 1.2V supply using your adapter, is that correct?

Could you please look at my setup and see if I'm missing something here? Should it be able to read the MCU Info with Glitch cable disconnected?

 

 

[Dagoberto Ramirez]

Hola tenemos  el mismo caso solo que si puede leer y no puedo escribir 

 

Soy Honduras 

 

Cel.504  3197 8683 

[kilya31]

The wire should be no more than two centimeters

[visavis88]

Thank you, but that didn't fix the issue. Even when I click on INFO button, it says "No response from the device! The message header was not received. Check the quartz frequency <Soft>".

I checked VCC and GND, it has ~3.3V when I click the INFO button.

Pin 8, has 0V, though the diagram says it needs 1.2V. Did I get the wrong adapter? It doesn't communicate even without that small adapter. 

[IKS]

 

1. Распространенная ошибка - драйвер программатора. Установите драйвер, предназначенный для программатора. Посмотрите внимательно видео.   https://t.me/gcthelp/86           

2. 1.2v напряжение не приходит с выхода программатора. Это напряжение конвертируется на самом адаптере от напряжения VCC при активном VCC. Нажмите кнопку "VCC" и проверьте при активной кнопке.

3. Микроконтроллер должен ответить программатору независимо от линии Glitch. Отключите линию Glitch- сделайте тест без нее. Вы даже сможете прочитать незакрытую область микроконтроллера -opbt0. Таким тестом вы уменьшите количество ошибок в подключении. ( но, микроконтроллер должен получать напряжение 1.2V Core power  и 3.3V VCC)

4. фото программатора нам не очень интересно.  Более полезно увидеть фото подключения к модулю аирбаг.

[visavis88]

Thank you — that makes sense now. It looks like the issue is that I don’t have a proper 1.2V supply.

I bought the 1.2V stabilizer adapter from one of your distributors, but it doesn’t output 1.2V on pin 8 (or any other pin) when powered with 3.3V. There’s a small chip on it labeled “A451” that produces 1.2V, but that output isn’t connected anywhere. I made a black jumper wire to pin 8 of the cable (as shown in the image), but as soon as I connect it to the SRS board, the voltage drops to 0V while 3.3V remains stable.

I’m assuming the stabilizer adapter is defective, or I might be missing something. I’ll try using a buck converter to generate 1.2V instead.

[visavis88]

Thank you again for helping me figure this out. I used another 1.2V voltage stabilizer and was able to read DataFlash1!

If the crash is in 49D0-4A00, should I erase both 4980 and 49C0 blocks?

2025 Mazda CX5 RH850 LOCKED (R7F701330A) Data Flash 1 BAD.bin

[IKS]

1480
49C0

 

or change "sec3f to id code" https://t.me/gcthelp/97

[visavis88]

Now it has no communication with the module. Maybe it erased the CodeFlash when I was trying to read it, because I was never able to read it, though reading DataFlash1-2 was usually successful. I also didn't remove the two small capacitors for the glitch- don't know if that made a difference. Next time I should probably not risk reading other areas, just the DataFlash1.

[FREDI]

I haven't been able to read dataflash, OPTB0 has. I've tried many times without success.