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  1. #31
    PWCToday.com Is My Home Away From Home JR IN JAX's Avatar
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    Re: Attempting to solve Code 25.

    Except for the bumps inside of it, it looks like a standard bar resistor which could be expected to be in that circuit.
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  2. #32
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    Re: Attempting to solve Code 25.

    Looks to me that it is an analog filter network along with maybe some signal conditioning or analog/digital conversion encased in the ceramic. If that is the case and the fault is inside that ceramic module, then there is no hope in fixing or repairing these ECU's.

  3. #33
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    Re: Attempting to solve Code 25.

    I'm new here. Lurking and reading all I can on these Honda skis. I recently bought an '05 F12X that does not have this problem (yet), and am very interested in the final outcome. I have an extra ECU given to me by a friend.....it had a Code 25.....and am completely game for de-potting and fixing stuff to keep for when mine does fail.

    Was the voltage regulator the root cause of the problem? Or was it that "ceramic thing"?

    Thanks,
    Kevin

  4. #34

    Re: Attempting to solve Code 25.

    The problem is corrosion. The potting fails and cracks. WaTer seeps in and corrodes. The knock sensor is a piezo microphone and the ecm expects a certain amplitude signal for a given rpm. This problem is near impossible to fix. My advice is to get a new ecm vs swimming against the current back to the dock.

    Sometimes the problem is the knock sensor. I would replace that first as they are cheaper. If you can swap in a good ecm to test that is a good way to check the ecm. The knock sensor is a bit harder to get to.
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  5. #35
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    Re: Attempting to solve Code 25.

    Thanks.

    I'm interested in digging the potting away like the other fellow and find out what corrodes, and if it is fixable. Maybe it isn't, but I'd love to try.

    That all said, my buddy's ECU was not from a turbo ski after all, so I'm looking for one now. Anyone out there have a toasted ECU with Code 25 that you want rid of?

    Thanks,
    Kevin

  6. #36
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    Re: Attempting to solve Code 25.

    Quote Originally Posted by SuperMAC View Post
    The problem is corrosion. The potting fails and cracks. WaTer seeps in and corrodes. The knock sensor is a piezo microphone and the ecm expects a certain amplitude signal for a given rpm. This problem is near impossible to fix. My advice is to get a new ecm vs swimming against the current back to the dock.

    Sometimes the problem is the knock sensor. I would replace that first as they are cheaper. If you can swap in a good ecm to test that is a good way to check the ecm. The knock sensor is a bit harder to get to.
    I don't think this is correct. The failure appears to be in the ceramic filter network, which is impervious to water.

  7. #37
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    Re: Attempting to solve Code 25.

    I’m game to investigate this further. I’ve got a buddy that’s an Electrical Engineer and develops EFI and DI systems for recreational and marine OEMs. He has a good handle on ECUs and circuit design, although not necessarily Keihin. If I could get a dead ECU and de-pot it, I could take that, a knock sensor, and a wiring diagram and I’ll bet he gives some insight. Maybe it’s the same conclusion as yours.....I’m willing to ask him.

    Also - I’d love to hear back from the other fellow that opened his up and see if the voltage regulator solved his issue.

    Thanks,
    Kevin

  8. #38
    I dream skis skidoc's Avatar
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    Re: Attempting to solve Code 25.

    NO FIXXIE>>>>>>> You cant Repair the Honda ECM.
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