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  1. #31
    PWCToday.com Is My Home Away From Home JR IN JAX's Avatar
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    Jun 2003
    Blog Entries

    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
    Resident Guru
    Join Date
    Aug 2008

    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
    PWCToday Newbie
    Join Date
    Jul 2011
    Lanexa, VA

    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"?


  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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