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[2004 Honda Odyssey] Replaced IAC Valve, now experiencing electrical issues

Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › [2004 Honda Odyssey] Replaced IAC Valve, now experiencing electrical issues

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  • March 21, 2019 at 12:09 am #893046
    DannyDanny
    Participant

      My 2004 Honda Odyssey had a poor idle and was giving a check engine light, signaling an issue with the IAC. I had the light checked and it was giving me an error code related to the IAC. I ordered an aftermarket IAC (https://www.amazon.com/gp/product/B01G6NWU1G/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1) off Amazon and replaced it yesterday.
      The issue: when I put the key in the ignition, the car registers the key is in. When I turn the key to start the car, I hear a click, and then the car stops receiving power. The car responds as if the battery is completely dead.
      I can disconnect all of the electrical connections from the IAC and the car will ‘reset’, but when I turn the key in the ignition the same issue occurs.
      Any advice on how to diagnose or fix this issue? I am almost positive it is an electrical issue with the new IAC, but not sure what to do.

      Thank you

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    • March 21, 2019 at 12:33 am #893050
      Billy AndrewsBilly
      Participant

        The problem still happens if you leave the IAC’s electrical connector disconnected?

        March 21, 2019 at 12:44 am #893052
        DannyDanny
        Participant

          Yes, If I leave it disconnected I have the exact same issue.

          March 21, 2019 at 2:05 am #893054
          Billy AndrewsBilly
          Participant

            Disconnecting the IACV pretty much eliminates it as proximate cause. Right now you’re looking at a no crank condition.
            What is the battery voltage?
            When you turn the key, does the starter relay click? If so, check the battery, starter, wiring, and grounds. If not, check the relay, ignition switch, and wiring.

            March 21, 2019 at 3:00 am #893055
            DannyDanny
            Participant

              The starter relay does click. I do not have a volt meter but will check after I pick one up. This is a very helpful response I will check the battery, starter, wiring, and grounds. Thank you!

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