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  1. #1

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    GTX beeps with lanyard off and DESS disconnected

    I've searched for answers for the past two weeks and can't find anything. MY 2005 SEADOO GTX SC BEEPS WITHOUT THE KEY ON THE DESS!!!!!! I've disconnected the connector that leads to the DESS and the start/stop switch, and the ski still beeps, AND the instrument cluster turns on.

    ALSO, the TOPS solenoid keeps cycling on/off ALL WHILE THE KEY IS OFF AND DESS DISCONNECTED. What gives?

    Things I've done:
    -Checked the two connectors on the MPEM and found corroded MPEM, so I replaced it.
    -Checked DESS post with an ohmmeter: works like it's supposed to.
    -Disconnected DESS and on/off switch connectors under the steering cover (right above the rectifier)

    And the Instrument cluster still turns on and TOPS solenoid cycles on/off!?!?!?!?!

    Anybody ever run into this?


  2. #2
    boost junkie skidoochris's Avatar
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    Mar 2012
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    correct mpem?
    the tops valve/dash will always come on with ecu wakeup

  3. #3

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    I purchased MPEM is off an 04 GTX. it's the correct one. Same part number.

  4. #4

    Join Date
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    Quote Originally Posted by klemb View Post
    I purchased MPEM is off an 04 GTX. it's the correct one. Same part number.
    It might be different, same part number but different programming. I would suspect your problem is in the mpem.

  5. #5

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    I checked compatibility through this forum and one of the moderators stated 2002-2006 mpems for the gtx are interchangeable. Even though the MPEM was replaced, i'm still experiencing the same problems with the same code (p1611).

  6. #6
    Strange electrical stuff like what you're describing is often the result of a poor ground somewhere. Make sure that each and every ground is cleaned and lubed with dielectric grease.

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