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Engine won't shut down

in 912 / 914 Technical Questions 11 years ago
I have a 912 UL with electronic module # 965358 and 4 pin connector. I have a 5 position ignition switch. The last time I turned the engine off, the rpm dropped about 100, but continued to run for about 30 seconds and then quit.I checked the single pin connections coming out of the A and B modules that goes to the ignition switch and they checked ok. I disconnected the module single pins from the switch and read the resistance between the modules single pins and ground with my digital meter. Module "A" reads 1.0 (no flow) while module "B" reads 0.29 ( some flow). Does anyone know what it should read? Should both read 1.0 or 0.29?
Any help would be appreciated.

Gene

  • Re: Engine won't shut down

    by » 11 years ago

    Hi Gene,

    Usually this can be caused by a loose ground wire from a module to the ignition switch. Make sure all the wires on the back of the ignition switch are tight. (Common area to have a loose wire) Check at the modules for a bad pin in the connector and make sure you have a good grounding between battery, engine and your main ground bus.

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

      
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  • Re: Engine won't shut down

    by » 11 years ago

    Hi Roger,

    Thanks for your reply.
    Everything that you mentioned, I had already checked and all was good. I have taken the modules off the engine and, of course, I get the same readings ( 1.0 and 0.29 ). That's why I suspect one of the modules is bad. I just don't know which one. Should they both read 1.0 or 0.29 or some other number.

    Gene
      
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  • Re: Engine won't shut down

    by » 11 years ago

    Gene

    This is common on the 4 pin modules. Pull the wires and you will find one will probably stretch. The inner core has broken but the outer PVC cover is still intact.


    IMG_1372_2012-04-11_2014-06-07.JPG (You do not have access to download this file.)
      
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