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  1. #11
    PWCToday Regular OZTRAX's Avatar
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    Mar 2012
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    On the beach
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    Re: Honda Jetski ECU

    Quote Originally Posted by matt888 View Post
    My thoughts were it was a weak circuit to begin with and a lot of people run lower octane fuel or over time the fuel loses its octane then the knock sensor circuit is over worked until failure.
    Low voltage may be the killer
    and water

    pic 1
    self amalgamate tape fitted instead
    of crappy insulation tape that was
    falling off

    pic2
    CBR1100 wiring
    ECM follows aquatrax
    but plugs are reversed
    eg B is A on ours
    Attached Images Attached Images
    F12X 2007 pretty well stock
    Beat up landrover D1 to tow it
    UPDATE: 1 Small staffy dog for company
    Honda XR 200 80s vintage
    Hamilton J83 jetboat with clevo 351 V8
    9 foot inflatable achilles !!!!

  2. #12
    PWCToday Newbie
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    Feb 2017
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    Florida
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    Re: Honda Jetski ECU

    Hey guys sorry about the supper late reply. I didnt think the thread had this much activity. Well I have 3 HW3 ecu's. Two are bad and 1 is good. I will strip down all 3 ecu's and hope to see something useful.

    The goal is to extract the firmware from the microcontroller. I designed a programmer using an arduino uno that can read, write, set security, and clear security. If I do a read on the ecu I get FF's which means the ecu security fuse is set. In order to remove the security fuse you have to erase the ecu then its off. But thats not what we want to do.

    Honda offers RWD files for ecu updates. I checked the list and there is no update for this ecu. If we can get our hands on the RWD file for the ecu then I might be able to convert it to a bin file.

    Matt with your connections at Honda is this something you can ask for?

    Thanks

  3. #13
    PWCToday Regular
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    Sep 2006
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    ski Northern Mich live in IL
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    57
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    55

    Re: Honda Jetski ECU

    HI

    I have not had any issues yet with the ECU. Do you guys think its a good idea to buy one (hopefully at a lower price ) ahead of time ? Its sounds like it is inevitable if you own a Honda.

    Thanks

    Dan

  4. #14

    Re: Honda Jetski ECU

    doubtful.. the ecu pcbs are different.
    MACSBOOST!!! The Honda PWC Performance Experts. www.MacsBOOST.com
    Home of the MACSBOOST Module and the Fastest Honda PWC on the planet.
    http://www.youtube.com/watch?v=yqufmQ_8bxU
    Be our friend on facebook! http://www.facebook.com/pages/MACSBO...e/233077830901

  5. #15
    PWCToday Newbie
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    Feb 2017
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    Re: Honda Jetski ECU

    Quote Originally Posted by SuperMAC View Post
    doubtful.. the ecu pcbs are different.
    Well sorry to inform you but your incorrect.

    I've stripped down 5 ecu's and they are 100% identical.

    I also gained access to the firmware and read all 5 ecu's with my 'special' programmer and compared the bin files and Honda used the exact same firmware for all 5.

    I managed to decompile the firmware and convert the bin file to assembly but it still needs some work as this conversion process is not easy. I located tons of tables in Winols by looking in different views but have no clue what they control. It looks like the engine uses many cam angle tables with matching fuel tables.

    Things I found but not tested

    - 16bit Fuel maps 18x24
    - 8bit Ignition Maps 18x24
    - Main RPM Axis 1x24
    - Overall Rev limiter located in 3 different locations at 7200 RPMS
    - Knock sensor enable/disable
    - Checksum enable/disable

    I did manage to locate the values that enable and disable the Knock Sensor and remove the ecu checksum but dont have anymore broken ecu's that specifically have the knock sensor issue to reflash and test on. The one's I have has various issues.

    I've already invested a good amount of time dont know how much more I'll spend on it.

    Thanks

  6. #16
    PWCToday Regular OZTRAX's Avatar
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    Re: Honda Jetski ECU

    Gen-tune
    PM me and I may have some contacts in the ECU hacking community,
    Also if you can share the bin and definition files with me I wouldn't mind a look over.
    Don't exclude that the CBR motorbike is similar and there are ECUs that already have
    Def files and tables identified.

    Suffice to say I bought a F12 (non turbo ) ECU, plugged it in and it runs
    OK in my turbo F12X. Tiny miss just as it revs past 3000 rpm but no fault codes.
    Meaning the lack of boost sensor signal isn't affecting the fuel map algorithm in a negative way.

    Regards
    OZ
    F12X 2007 pretty well stock
    Beat up landrover D1 to tow it
    UPDATE: 1 Small staffy dog for company
    Honda XR 200 80s vintage
    Hamilton J83 jetboat with clevo 351 V8
    9 foot inflatable achilles !!!!

  7. #17
    PWCToday Newbie
    Join Date
    Jul 2011
    Location
    Lanexa, VA
    Age
    44
    Posts
    25

    Re: Honda Jetski ECU

    Have you read this thread? Here’s a fellow that narrowed down the fried components and was trying to fix units. If you could figure this out you would truly be a hero. I could possibly help with this, PM me if you want. Thanks.

    http://www.pwctoday.com/showthread.php?t=462337

  8. #18
    I dream skis skidoc's Avatar
    Join Date
    May 2012
    Location
    tampa
    Posts
    522

    Re: Honda Jetski ECU

    Good Luck...............
    Brian Brocksmith
    813-786-4418
    http://jetskisint.com
    Free Aquatrax Tech support
    https://www.facebook.com/pages/Jet-S...91943504243227

  9. #19
    PWCToday Newbie
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    Feb 2017
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    Florida
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    Re: Honda Jetski ECU

    Quote Originally Posted by OZTRAX View Post
    Gen-tune
    PM me and I may have some contacts in the ECU hacking community,
    Also if you can share the bin and definition files with me I wouldn't mind a look over.
    Don't exclude that the CBR motorbike is similar and there are ECUs that already have
    Def files and tables identified.

    Suffice to say I bought a F12 (non turbo ) ECU, plugged it in and it runs
    OK in my turbo F12X. Tiny miss just as it revs past 3000 rpm but no fault codes.
    Meaning the lack of boost sensor signal isn't affecting the fuel map algorithm in a negative way.

    Regards
    OZ
    Yea I'll think about releasing the firmware. I spent quite a bit of time and money opening up the microprocessor exposing the Die to unlock and extract the firmware. I am really looking to find bad ecu's that specifically have code 25 issue.

  10. #20
    PWCToday Newbie
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    Feb 2017
    Location
    Florida
    Posts
    27

    Re: Honda Jetski ECU

    Quote Originally Posted by Lightningtruck View Post
    Have you read this thread? Here’s a fellow that narrowed down the fried components and was trying to fix units. If you could figure this out you would truly be a hero. I could possibly help with this, PM me if you want. Thanks.

    http://www.pwctoday.com/showthread.php?t=462337
    Yea I've been lurking there lol. Havent posted anything yet until today. Not possible to fix the ceramic PCB and will be too much work everything to repair one. Best route is to reprogram the ecu to disable the sensor completely. Wouldn't happen to have a broken ecu or a friend that has one?

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