GM HMI 2.5 EMMC Chip Pinouts for dumping the HMI Emmc Chip

$100

GM HMI 2.5 EMMC Chip Pinouts for dumping the HMI 2.5 Emmc micro Chip

This PDF file illustrates a pin diagram that identifies the HMI 2.5 EMMC chip pins for connecting to a SD card adaptor for dumping the contents of the HMI 2.5 module's EMMC chip, which stores the Sat-Nav maps, calibration files, VIN number and other operating files.

Knowing the HMI EMMC pinouts has various benefits.

You can modify various files example: install your own custom boot up video for the display.
Repair a faulty HMI that has corrupted EMMC chip files.
Swap Map files.
etc.

This tutorial offers only pin-out information for the EMMC.

It does not offer nor do I offer any information or solution about any issues you may have regarding to HMI reseting or other HMI issues.

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File Information

Views 9,940
Submitted November 6, 20223 yr
Published November 6, 20223 yr
Updated March 6, 20251 yr
File Size 13.76 MB

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Troy

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24 Comments

+konsheyn

+Purchaser

November 19, 20223 yr

Just curious, how is you manage to use SDCard reader? Which port is capable to support it? I would go to JTAG first, but it's just me. But Jtag require specific driver for reader and that would be BIG issue.

Quote

Troy

Administrator

November 19, 20223 yr

1 hour ago, konsheyn said:

Just curious, how is you manage to use SDCard reader? Which port is capable to support it? I would go to JTAG first, but it's just me. But Jtag require specific driver for reader and that would be BIG issue.

The pinouts is for the HMI 2.5 EMMC memory chip which stores all the modules data. It is not for the HMI's CPU.

Quote

+konsheyn

+Purchaser

November 19, 20223 yr

Still don't see any practical use to it. Unless VIN stored on it, which I don't believe at all. But idea itself could be interesting some day. You can delete it if you don't like me posting it.

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Troy

Administrator

November 19, 20223 yr

Yes the HMI 2.5 VIN is stored in the EMMC chip.

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+konsheyn

+Purchaser

November 19, 20223 yr

Hmmmmmmm..... Why use DPS then? would it be easier just to edit it in place?

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+konsheyn

+Purchaser

November 19, 20223 yr

Instead of selling files I would be selling HMI programmed to your vin on eBay. I would buy it for sure and less hassle with GM, I assume.....???? (may be wrong)

Files could be used by a few, HMI need lot of guys

Quote

Troy

Administrator

November 19, 20223 yr

14 minutes ago, konsheyn said:

Hmmmmmmm..... Why use DPS then? would it be easier just to edit it in place?

That is a very stupid question.

Which option is easier¿

Would you prefer to remove the HMI module from the car, dismantle the HMI module, sources an SD card adopter, solder 10 very thin wires onto the HMI's circuit board, for changing the VIN.
Or would you prefer to quickly use DPS with a file to change the VIN while the HMI is still installed in the car.

Knowing the HMI EMMC pinouts has various benefits.

You can modify various files example: install your own custom boot up video for the display.
Repair a faulty HMI that has corrupted EMMC chip files.
Swap Map files.
etc.

Quote

+konsheyn

+Purchaser

November 19, 20223 yr

LOL, how HMI get to your car with wrong VIN in first place. But you are right on your side, I'm looking to solve my problem and that exclude your point of view of adding video while driving, which I found very strange to fight for. Still waiting for you to answer my question regarding file for HMI VIN relearn, so I can buy it

Quote

Troy

Administrator

November 19, 20223 yr

2 minutes ago, konsheyn said:

LOL, how HMI get to your car with wrong VIN in first place. But you are right on your side, I'm looking to solve my problem and that exclude your point of view of adding video while driving, which I found very strange to fight for. Still waiting for you to answer my question regarding file for HMI VIN relearn, so I can buy it

I've already reply to your question on that file.

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+konsheyn

+Purchaser

November 19, 20223 yr

Did you tried to trace those test points to edge connector? Or may be trace that edge connector to processor to see which ports it connected to?

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+Dan79

+Contributor

January 5, 20233 yr

Contributor

Hi you write swap map files , how do i know what files that needs to be swapped?

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Troy

Administrator

January 5, 20233 yr

7 minutes ago, Dan79 said:

Hi you write swap map files , how do i know what files that needs to be swapped?

Meaning it's possible to swap files. I don't know which files needs to be swapped. You would need to experiment and figure it out.

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+pollosuper

+Contributor

July 20, 20233 yr

Contributor

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+pollosuper

+Contributor

July 20, 20233 yr

Contributor

hola., con cual programa puedo cambiar o modificar el numero vin? el modulo hmi cuenta tambien con un bga64 y una bga100, y tengo entendido que ahi viene el numero vin...pero habra que ingeniarsela para brincar el watchdog segun me comenta otro colega,,, agradeceria mucho tu comentario,. gracias de antemano de igual forma creo que al leer a travez de cableado en SD directo a tarjeta es como se identifica el vin....pero que programa utilizas para visualizar el numero vin?

Quote

Troy

Administrator

July 20, 20233 yr

3 hours ago, pollosuper said:

hola., con cual programa puedo cambiar o modificar el numero vin? el modulo hmi cuenta tambien con un bga64 y una bga100, y tengo entendido que ahi viene el numero vin...pero habra que ingeniarsela para brincar el watchdog segun me comenta otro colega,,, agradeceria mucho tu comentario,. gracias de antemano de igual forma creo que al leer a travez de cableado en SD directo a tarjeta es como se identifica el vin....pero que programa utilizas para visualizar el numero vin?

Hi, you can use the DPS tool and this file to change the VIN in the HMI.

Quote

+pollosuper

+Contributor

July 24, 20232 yr

Contributor

Hola de nuevo ya ví el vídeo de como quitar el bloqueo, entiendo que es a través de una PC., Que se ocupa para conectar la PC a puerto obdII? Esa parte no la entendí., Algún scaner? Gracias por tu respuesta., Mañana depósito para comprar herramienta DPS

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+Arbe_gtc

+Contributor

February 9, 20242 yr

Contributor

Hi guys, I'm having problems accessing the emmc partitions. appear, but are not mounted as EXT4 I have tried 8 different computers, with integrated SD readers and always the same result. I have bought several readers, and the same thing. I have only managed to read the partitions with an SD reader similar to the DPMCR4 but the one I had, has decided to rest in peace. I have removed 4 electrolytic capacitors from the HMI board (it is a board that cannot be repaired but I would like to read the emmc) Any ideas? Or does anyone know which reader I can use?

I understand that only a few readers can read the emmc....if anyone knows any or what the problem could be...let me know

image.png.44b08ac38fb0edd495891d791505ba98.png

image.png.a63467bf375de6957d0c4ab3cbb549bc.png

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+med458

+Contributor

June 17, 20242 yr

Contributor

Hi Troy do you still do this method? Have you considered pogo pins?

Quote

+med458

+Contributor

June 19, 20242 yr

Contributor

On 2/9/2024 at 9:40 AM, Arbe_gtc said:

Hi guys, I'm having problems accessing the emmc partitions. appear, but are not mounted as EXT4 I have tried 8 different computers, with integrated SD readers and always the same result. I have bought several readers, and the same thing. I have only managed to read the partitions with an SD reader similar to the DPMCR4 but the one I had, has decided to rest in peace. I have removed 4 electrolytic capacitors from the HMI board (it is a board that cannot be repaired but I would like to read the emmc) Any ideas? Or does anyone know which reader I can use?

I understand that only a few readers can read the emmc....if anyone knows any or what the problem could be...let me know

Hello my friend, I am going to attempt this, did you get it done well? Do you have any tips or suggestions for someone who has not done it yet? I tried once and failed, but I am going to give it another try with the recommended Aliexpress card but wanted to see if there is anything I should know for success. Thank you sir.

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+Arbe_gtc

+Contributor

June 19, 20242 yr

Contributor

It appears that only certain SD readers are supported. and since my partition table was corrupted, I couldn't read anything. And I have not tried it again and I am not going to buy another HMI so that the same thing happens to me.... I had to remove all the capacitors because they were loaded and access to the emmc began to fail.

Quote

+med458

+Contributor

June 19, 20242 yr

Contributor

22 minutes ago, Arbe_gtc said:

It appears that only certain SD readers are supported. and since my partition table was corrupted, I couldn't read anything. And I have not tried it again and I am not going to buy another HMI so that the same thing happens to me.... I had to remove all the capacitors because they were loaded and access to the emmc began to fail.

Ok I understand. That might explain why I failed at first. I tried 2 readers but nothing appeared using DiskGenius. But my readers are cheap. Do you have a suggestion for a high quality reader? I don't guarantee my soldering or pogo pin contacts. I was going to wait until the Aliexpress card came, but if the problem is the reader, I will just buy a very high quality reader.

EDIT: upon looking closer at Troy's photos, it appears he is using a Pris Apple SD Card reader. I will buy one of those.

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+Arbe_gtc

+Contributor

June 19, 20242 yr

Contributor

check this thread https://forum.odroid.com/viewtopic.php?t=2725.

there are some readers compatibles

Quote

+med458

+Contributor

June 19, 20242 yr

Contributor

5 hours ago, Arbe_gtc said:

check this thread https://forum.odroid.com/viewtopic.php?t=2725.

there are some readers compatibles

Thank you for your advice. I will look into some of these and buy one. Let me offer some advice, you probably already know it, but if you do not want to solder directly to the board you can use pogo pins with blank pc boards and a digital microscope to verify contact. It is safer and best if you plan to do it more than once. I will reply after I get a better sd card reader to let you know my progress. Until then, thank you for your helpful advice now and in the past, you have always been very nice to help me out always. Have a good afternoon sir (depending on your timezone).