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    I'm busy nearly 24/7 coding for my own projects

    I'm busy nearly 24/7 coding for my own projects
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    It's part of OBD specs that ecu could output...

    It's part of OBD specs that ecu could output particular address contents, but it works for restricted address range. It helps scan tool determine what data sets and active tests are supported by a...
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    p/s well the tom's ecu was not entirely useless...

    p/s well the tom's ecu was not entirely useless actually
    OTP memory chip, the one in socket, is not encoded and contains maps
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    I got it from Yahoo Auction in Japan, searched...

    I got it from Yahoo Auction in Japan, searched for quite a while
    And it wasn't worth it
    Get 3UZ and send it to me to get ramapped, that's it
    I support any 3UZ ecu ever produced
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    cheap standalone like the MS would be cheaper and...

    cheap standalone like the MS would be cheaper and more efficient
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    8-bit ecus seem to have been cracked locally to...

    8-bit ecus seem to have been cracked locally to me
    16-bit ones might be supported in future
    Having personally tested Tom's ecu for 1uz-fe vvti I can't see too many reasons one might want it, or...
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    MarkT...

    MarkT
    https://www.youtube.com/watch?v=vUFxl9f9X88
    that's regarding the jap kit
    Regarding stock 1uzfe vvti
    My car is 1570kg complete with driver, makes 0-100kph in low 6's , I can't depress the...
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    MarkT If you try looking at the throttle you...

    MarkT
    If you try looking at the throttle you will notice it acts instantly. Also, the japs have already made a kit that lets you kill the transmission by not allowing ECU to close the throttle if...
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    Jeff Lange quick example 89540-50111 is...

    Jeff Lange
    quick example 89540-50111 is abs/vsc/trc controller for '1999 toyota celsior / lexus ls400 , dbw, vvti and separate trc computer.
    other cars, same story

    the combined abs/vsc/trc...
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    traction control is a separate unit in any sc400

    traction control is a separate unit in any sc400
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    The results would be barely useful in practice...

    The results would be barely useful in practice anyway
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    ok! I will probably do some tests before winter...

    ok! I will probably do some tests before winter
    I found out that engine control processor can be interchanged between "similar" ecus
    I want to try trans control processor from tom's to determine...
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    Sparkie, I can donate what I have by next winter

    Sparkie, I can donate what I have by next winter
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    MarkT ECU dead, putting effort to newer...

    MarkT
    ECU dead, putting effort to newer toyota/lexus models
    The ECU is like to have been dead all the time we tried to figure out how to go on with the firmware
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    Wow that's already quite something! I'm...

    Wow that's already quite something!
    I'm temporarily busy with my main activities, but I still wait for the order of EPROM socket to arrive soon.
    I may be slow at reading the 2nd chip but I'll...
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    ok, sorry I can sometime response slowly due to...

    ok, sorry I can sometime response slowly due to my main activities
    Currently I'm waiting for the socket that I ordered from my local supplier
    Will try to read the other chip later this week

    p/s...
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    well I could only figure out that 28F102 's...

    well I could only figure out that 28F102 's vendor is STM, and that it can be replaced with 29F102, no much luck after that moment :wink:

    PLC44 cradle: turned out extremely hard to find one with...
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    Oscilloscope - yes, 2-channel, but it's only...

    Oscilloscope - yes, 2-channel, but it's only 20MSamples/sec, without storage
    Logic analyzer - 8channels, up to 20M samples/s
    EPROM reader - yes, I have already read the non-soldered chip, but I...
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    Well the part numbers on the two "big" chips are...

    Well the part numbers on the two "big" chips are grinded
    However I have a collection of photos for JDM ECUs of this type

    Such ECUs are not Toyota thing but rather a small-scale production of...
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    https://a-a.d-cd.net/ae1b972s-960.jpg...

    https://a-a.d-cd.net/ae1b972s-960.jpg
    https://g-a.d-cd.net/bfeb972s-960.jpg
    https://c-a.d-cd.net/a7eb972s-960.jpg

    The ECUs of interest typically run a couple of 9000 series CPUs and one another...
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    Sparkie, do you ever plan to work on newer ECUs?...

    Sparkie, do you ever plan to work on newer ECUs?
    I have factory tuned 1UZ VVTi ECU (1997-2000), it's still based on Toshiba 9000 series CPU, which is still mask ROM based, I believe (though I may be...
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