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Thread: 3P's TCCS Disassembly/Analysis

  1. #751
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    Default Re: 3P's TCCS Disassembly/Analysis

    e43d931s-960.jpg

    JZX100 ECU test. 3 boards running 68pin denso MCUs from external RAM. 540cc injectors from Toyota Caldina. No MAF. Engine tends to stall.

    Last edited by mentat-vvo; May 2nd, 2017 at 06:36 PM.

  2. #752
    Established 1994
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    Default Re: 3P's TCCS Disassembly/Analysis

    When you get around to it...how hard would it be to switch from 550cc injectors to 680 or larger? After you produce the modified PCM.
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  3. #753
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    Default Re: 3P's TCCS Disassembly/Analysis

    There's a "magic" constant exist in the code. Works similar to the "req fuel" constant in mega$quirt.
    JZX90, 1JZ-GTE, MAP-based, also has this constant and could be tuned up to 850cc injectors. Maybe even more.

  4. #754
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    Default Re: 3P's TCCS Disassembly/Analysis

    7M-GTE code (gray connectors) for IDA with some comments
    https://yadi.sk/d/JLxfDOfH3LeLvZ
    I'm currently working on the replacement of a Karmann vortex type AFM with a "hot-wire" one from JZX100.
    Also, I'm planning to replace altimeter MAP with a MPXH6400. It is strange that internal altimeter MAP has such a priority along with other ADC channels. Although the altimeter MAP has lots of pins, only three of them are actually used.

    9f14299s-960.jpg

  5. #755
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    Default Re: 3P's TCCS Disassembly/Analysis

    I've made experimental ECU with stock AFM, equipped with my external memory module + upgrade of the MCU (7433->5B25CT-1, which has +100 bytes of RAM).
    Changes that were made:
    1) Stock barometer MAP became external; can be easily replaced by an MPXH6400 (20kPa - 400 kPa)
    2) A communication port with a bluetooth module / USB-RS232TTL for comms/firmware upgrade was attached
    3) 5-pin connector was attached for an external hot-wire AFM (5 signals: +B, VG, THA, E2, EVG); ADC6 was used for this through 47nF/2k7 RC-filter

    Stock code will be modified so that I will be able to record logs for MAP/hot-wire AFM to replace karmann vortex AFM either to a hot-wire type or to MAP.

    IMG_5548.jpg
    Last edited by mentat-vvo; August 5th, 2017 at 03:30 AM.

  6. #756
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    Default Re: 3P's TCCS Disassembly/Analysis

    So I'm back in the 7M game now is there any way I can get in on this?
    87 T 2JZ-GTE
    91 T 60k Miles
    98 SC300

  7. #757
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    Default Re: 3P's TCCS Disassembly/Analysis

    ^ Agreed

    Any options available for an 87' 7M-GTE M/T ECU?

    Pi, do you have any boards made up yet?
    I rebuild / upgrade Supra Differentials - PM me for more information.

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  8. #758
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    Default Re: 3P's TCCS Disassembly/Analysis

    Updates for this centry?
    87 T 2JZ-GTE
    91 T 60k Miles
    98 SC300

  9. #759
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    Default Re: 3P's TCCS Disassembly/Analysis

    I guess this is now a dead project. I guess the secrets of the TCCS will be lost again.
    87 T 2JZ-GTE
    91 T 60k Miles
    98 SC300

  10. #760
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    Default Re: 3P's TCCS Disassembly/Analysis

    I guess it's not dead.

    I know beta testers (I'm one of them) are not as acive as before. Personaly I've spun a bearing and no time/money/bravoure to repair yet.

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