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[HOW TO PATCH] MIB2 MST2 ZR/PQ Technisat/Preh NON GPS UNIT Patch

ash9949

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Location
Poland
Car(s)
golf 7

About units​

There are two types of MIB2 PQ units:

Discover Media in short DM (With navigation/2 SD Card slots) – xxx 035 680 (xxx is 5C0, 7N5, 7N0…)

Composition Media in short CM (Without navigation/1 SD Card slot) – xxx 035 200 (xxx is 5C0, 7N5, 7N0…)



DM is possible to do without disassemblying – with SD card hack

CM need to disassembly and read emmc.



 

Attachments

  • MST2_PQ EmMc_Tutorial.pdf
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ash9949

Ready to race!
Location
Poland
Car(s)
golf 7


TechniSat/Preh MIB2 STD ZR eMMC read/write

#About​

This repository contains some scripts and documentation how to Watch also the nested documents for upgrade the MIB2 firmware to a different HW train (e.g.: 02xx -> 03xx, 04xx). Or The documentation is for the Technisat MIB2 STD unit without navigation. It describes how to patch the swdownloadbinary, that the unit accepts updates for a higher HW train.
In addition to this repository it's required to have access to theMIB Solutions folder on MEGA.nz (Link can be found in various forums and is changing from time to time. Just google for it). There you find the firmware updates and tools to patch the swdownloadbinary. Such an update is was not intended by the manufacturer.
You will loose your warranty and there is a chance to brick your device. Everything you do is by your own risk.

#Limitations of the MIB2 STD without navigation​

For MIB2 without navigation it's currently not possible to patch the swdownload binary with the Update-Approval_SOP4_signed method, because of the different CPU (cpuplus instead of cpu). To patch the swdownloadyou have to dump the eMMC, exchange the binary and write everything back to the unit.
The eMMC of the MIB2 with navigation can be read with an adapter from the second SD card reader. For the model without navigation the only way to read the eMMC is to connect to the through-hole plating on the PCB. This can be done by soldering very thin wires to the holes or contact them with probes.


#Upgrade procedure​

  1. Connect a SD card reader to the eMMC through-hole plating (soldering or probes). For me the connection was only stable with DATA0 connected and DATA1-3 unconnected (-> slow read & write)
    • eMMC pinout:


      alt text
      alt text



    • See this image for a SD card pinout

    • example of probes soldered to a USB SD card reader (alternative pinout)


      alt text
      alt text

  2. Dump the eMMC content to your Linux Host and convert it to a *.vmdk file. Execute this script to do it.
  3. Start your QNX VM (image can be found in the MEGA folder) and add the vmdk file as virtual hard disk.
  4. Copy the swdownload binary from the vmdk file to your host. In the QNX VM you find it under following path /fs/hd1-qnx6/tsd/bin/swdownload/tsd.mibstd2.system.swdownload. You can use SSH to copy it from QNX VM to your host.
  5. Patch the swdownload binary with the python scripts or SWDLPatcher.exe from the MIB Solutions folder on MEGA.
  6. Rename the patched swdownload binary to the origin name, copy it the QNX VM and overwrite the origin one in the vmdk.
  7. Shutdown the QNX VM.
  8. Convert the vmdk file back to a raw disk dump and write it to the eMMC. Execute this script to do it.
  9. Get the CPU ID of your MIB2 unit.
    • Power it up, press menu button for 10 sec., select FW -> version -> current version -> cpu or cpuplus.
    • The CPU ID is the number in braces.
  10. Take the firmware to which you like to update and patch the metainfo2.txt file.
    • In this file you have to add links to your CPU ID and set RequiredVersionOfDM to RequiredVersionOfDM = "0"
    • Find a section which starts with cpu and get the used CPU ID in that firmware (e.g.:[cpu\audioservice\36\default\Application] --> CPU ID: 36)
    • Execute this python script to patch the metainfo2.txt file. (e.g.: your CPU ID: 18; target firmware CPU ID: 36 --> python3 metainfo_parser.py metainfo2.txt metainfo2_patched.txt 36 18
  11. Rename the patched metainfo2.txt file to the origin name and overwrite the one in the firmware folder.
  12. Format a SD card with FAT32 and copy the firmware to it (metainfo2.txt must be in top level on the SD card).
  13. Put the SD card in your MIB2 card reader and start the update.
Maybe you will get a SVM Error after the update. Follow this instructions to remove it with VCDS or OBD11.


#Useful References​


#Reference:​

https://github.com/Feserich/mib2std-zr-firmware-upgrade
 
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