Cluster EEPROM modifications

Discussion in 'Gen 3 Prius Technical Discussion' started by d4vit, Jan 20, 2025 at 5:55 PM.

  1. d4vit

    d4vit Junior Member

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    Hello everyone.
    I tried to find some threads or articles about this but i had no luck so i decided to post it here.
    So long story short, how to change MPG to 100km/l and other metrics to europian from USA cluster and dash
    i know that i should do it by reading eeprom from cluster which is no problem for me just what should i change in dump which byte on which address to change it.

    image as example
    upload_2025-1-21_2-55-48.png
     
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  2. bisco

    bisco cookie crumbler

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    if you can do it, you'll be the first. all the best!
     
  3. MAX2

    MAX2 Member

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    You have already written before.
    Any way of chaning MPG to 100KM/L on dash | PriusChat

    The photo shown is of a Japanese panel.
    In Japan, consumption is measured in km/l

    You need to install a European panel.
     
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  4. Tombukt2

    Tombukt2 Senior Member

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    Yeah why would you try and attempt or do all this computer wizardry and nonsense when you can literally just possibly get a panel that goes in a car or they do all those measurements but yeah I'm sure you can and all of that how you're going to find out how the buses work and where you need to be and what you need to be looking at I couldn't tell you buddy That's what reverse engineering is all about You're supposed to have an idea of how that works if that's what your attempting to do I guess back in the old days of Toyota mods my god these guys spent months sometimes years on silly conversions that seem silly to me but apparently they were very something to them I'm talking about redoing wiring harnesses to fit skyline engines and the old funky Toyotas and vice versa and all of this kind of stuff It was crazy and then reading text from these people that are doing these things and trying to figure out more things to do and oh my God it was just unbelievable.
     
  5. d4vit

    d4vit Junior Member

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    OMG, I have information about the non-restyled Prius bytes that I need to change, and I just want to know which ones i need in restyling(2013+).

    Also, in my country, I don't have access to European Priuses to buy locally, and if I buy one from eBay, I would still need to correct the mileage. This means I have to remove the EEPROM and change the data. Additionally, it will cost me five times more than a US cluster would in my country. So, please, if you have an answer to my question, provide it; if not, let's not waste time typing or reading a lengthy comment that doesn't offer the information I need.
     
  6. d4vit

    d4vit Junior Member

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    I know it's a Japanese cluster, and I see that it calculates consumption in L/km. This image is just a showcase to make the thread more engaging. As for the second cluster, it will cost me five times as much as a USA cluster in my country because all cars here have USA clusters. I would have to buy it from eBay or a similar platform, which in total will cost me around four to five times more.
     
  7. d4vit

    d4vit Junior Member

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    To change Fahrenheit to Celsius, you should remove the climate dashboard and read out the EEPROM (S93C86), then change byte 49 to 43 and B6 to BC.
     
  8. ChapmanF

    ChapmanF Senior Member

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    Sweet! I drive a US gen 3 in the US, and have always wished I could change that to Celsius. Never had the determination to work out what bytes to poke.
     
  9. d4vit

    d4vit Junior Member

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    this website is international or only for US members only?
     
  10. Prodigyplace

    Prodigyplace 2025 Camry XLE FWD

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    It is international, but the information you need is Toyota proprietary information. Most people here are from the US, some from Canada, and fewer from other countries around the world. .
     
  11. ChapmanF

    ChapmanF Senior Member

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    and now seems to be in post #7 also. (y)
     
  12. Prodigyplace

    Prodigyplace 2025 Camry XLE FWD

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    Partial information, perhaps. Still nothing on the speed though.
     
  13. Tombukt2

    Tombukt2 Senior Member

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    What is GE I don't know that country or any of that I got a US cluster sitting right here I could about ship it anywhere in the world probably for who knows I shipped a similar part to Greece and it was only $130 was an MFD for a generation too which is no bearing here let me know if it interests you I'd really like to get it out of my hands.
     
  14. Prodigyplace

    Prodigyplace 2025 Camry XLE FWD

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    I think it is the country of Georgia.
     
  15. Tombukt2

    Tombukt2 Senior Member

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    Like aruddia Georgia . Dannon yogurt commercial in 80,s old people in add.live forever he he to bad Gen3 won't
     
  16. MAX2

    MAX2 Member

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    The memory dump contains important information about the car's mileage. Therefore, the manufacturer does not distribute such information in the public domain. Those specialists who are constantly engaged in reflashing various devices and equipment know what needs to be changed in which microcircuits, but this is their income and they will not post information on the Internet for free.