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Reading the Sirius 32N ecu with Galletto v54 (With Video)

By on July 13, 2018
bdm tool for cars










Hi folks!

After I received lot of questions about a tricky cable set of the China-clone Galletto V54 ECU programming tool, from the internet, from people with who I hang out etc. I decide to make a video and release it on Youtube.

Reading the Sirius 32N ecu with Galletto v54

The Galletto V54 tool is a nice tool for r/w the memory ( flash IC ) content of the desired ecu. The tool can be used on some cars through OBD2 connector, this is the easiest way to r/w the ecu.

But this is not the safest way. The Galletto V54 also deals with so called “Boot mode” r/w and BDM r/w too. This is the Galletto V54:

Galletto V54

Sometimes people make some mistakes when they talk about r/w the ecu. They think this and such a tool can read the firmware of the uC from the ecu, but that is not true. Every ecu has a kind of flash memory inside, where all the setups of the car are programmed and the uC will use that infos.

So, with this kind of tool we can r/w the setups of the cars. Something like the ignition setup, EGR reacting setup, immobilizer setup etc…

If you think you can with such of tool read the firmware and hack it and write it back than you are wrong and pls. don’t buy this kind of tool. You probably need some programming tool for the desired uC. As I wrote above, this and lot tools this kind have the ability to r/w through several type of communication connection and protocols.

I will list 3 most common types:

– OBD2 connector

– Boot mode

– BDM connector

The OBD connector is fitted in the car and you will connect the r/w tool to it and do the job. Most tools won’t read out the complete content of the flash, just a part of it, where the so called MAP’s are are located. The maps are the setting of several parameters of the behavior of the engine.

Like the map for injection, the EGR map etc…

The BOOT MODE is a type of communication where the targeted ecu must be set in a stage so the r/w tool can access the flash memory content, and do the desired operation. The ecu must be opened and poked around some test point’s, set some extra wirings to set some needed signals so the ecu will/can go to boot mode. This is a dangerous proccess and the ecu can be toasted if something goes wrong, or by usind wrong wirings.

The wrong wires labeling in the documentation of the r/w tool was the inspiration to make this video.

The BDM type of reading is maybe a safer way to r/w than the Boot mode but also with high risk to damage the ecu. Actually, you must also open the ecu but in this case you will use some connectors for the desired ecu which will come with your tool and you don’t must digging around the test points etc. But there are also feeding some extra signals but you also have the place where you must put the tip from the r/w tool…

This is a set of BDM tool for r/w:

bdm tool for automobiles



The safest way to make a good backup of the ecu flash memory is through BDM reading. The second option is the Boot mode and the last one is the reading through OBD connection.

In that case, you must have a big acknowledge about ecu repairing, so you can decide is the content ok or not after read out the content through OBD.

If you wish to be safe, every time use BDM programming mode, this is actually the factory type of programming of the ecu’s and that is the reason why you can find that connector on the PCB of the ecu. Watch the video here and you will see how to set up in boot mode the Siemens Sirius 32N ecu.

I hope you enjoy this tutorial and will save lot of repair time.

This article was prepared for you by Christian Robert Adzic from Novi Knezevac-Serbia.

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  1. Parasuraman

    July 14, 2018 at 12:02 am

    Beyond me!

  2. Albert van Bemmelen

    July 14, 2018 at 1:17 am

    A very interesting article for car-owners Christian! But it seems to me that if car manufacturers do not share their firmware with car owners (like VW kept everyone in the dark concerning the Volkswagen emissions scandal etc.) modifying or reading of ECU technology and understanding the firmware must be hard. I heard from my neighbour that his car easily can be firmware upgraded by the Car-Dealer, making the same cheaper bought car more powerful by increasing the power of the engine (and obvious also increasing the fuel exhaust emission). Because apparently the car was officially degraded by firmware to make the same powerful engine run more environment friendly and so making its purchase much cheaper (strange politics that do not work).

    • Christian Robert Adzic

      July 14, 2018 at 6:52 pm

      Thank you for supporting my articles.
      A very good concept of writing in your comment. 😉

      So, the thinks are these:
      We have to learn several relations when we talk about programming an ecu or bsi or abs ecu etc.

      1. we almost never do a firmware update, there is not need, especial on a really high ranked car maker.
      2. the car makers never make his own electronics, so in my VW Polo is an Italian electronic system. The maker of the electronics in my are is Magneti Marelli.

      2. The dealers and repairers are talking and mixing up thinks.
      They always talk about "firmware upgrade" but in real situation that is the MAP update in the ecu.
      A MAP update has nothing to do with firmware update.
      The firmware controls the hardware based of the setup parameters in the MAP files of the flash ic.

      Any parametric changes made in the car are changes in the flesh ic.
      - torque
      - speed limitation
      - immobilizer infos
      - egr, O2 sensors etc. etc... these are all setup in the flash ic and not in the firmware...

      Sometime the manufacturer release a new version of firmware, that's true, but then you have a big problem because I would never trust a car maker who sell his cars and after a while they release several firmware update.
      That would mean their cars electronics are crap...

      This is just a very small portion of the reality, I could write and write and write... 🙂

      • Albert van Bemmelen

        July 15, 2018 at 7:53 pm

        Thanks for your comprehensive reply Christian. When manufacturer's indeed do write dangerous firmware, no pedestrian will be safe on the streets anymore. Especially when cars drive without human intervention and kill people already. Even if the car's firmware works flawlessly, still the sensors made by other firms can be defective. And yesterday another scandall about electronic sensors was revealed on Dutch tv. It was about farmers who were forced to install expensive aircleaning systems in their pigfarms. And after recent inspection by the authorities it was a stated fact that almost none of the aircleaner installations worked because of bad sensors or work done by unqualified workmen. Also by false regulations that made possible that anyone even without qualifications could install those aircleaner installations.

  3. Robert Calk Jr.

    July 14, 2018 at 5:37 am

    Nice work, Chris. Thanks for sharing with us!

  4. Mark

    July 14, 2018 at 10:51 am

    Hey Chris,

    Well done, especially with the video. I look forward to future articles and videos 🙂

  5. Justice

    July 16, 2018 at 3:00 pm

    Its a wow article and educational, thanks.

  6. Andrea Del Corso

    July 19, 2018 at 11:54 pm

    Thank you for this excellent article.


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