Subwoofer causing Hybrid Failure

Discussion in 'Prime Accessories and Modifications' started by covrc, Nov 21, 2020 at 2:46 PM.

  1. covrc

    covrc Junior Member

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    I have a 2020 Prius prime. Stock stereo. I upgraded it adding separates in the front and disconnecting the rears. I have a DSP under the passenger seat and a five channel amp under the drivers Seat. The fifth channel runs to the rear hatch where I have an Audison 8” passive amp enclosure.
    Last week I started getting dashboard warning lights telling me that the hybrid system as well as all the safety features such as lane departure were malfunctioning. And, indeed the hybrid system was not functioning.
    I took it to my Toyota dealer, and $600 later I am told that the magnet from the subwoofer was impacting the heating and cooling systems of the hybrid battery. I don’t know if this is accurate or not and I guess time will tell. The subwoofer has been disconnected. I’ll see if the problem happens again. I do notice water in the charging port after rain. The dealership said this would not be causing the problem. Again time will tell.

    Has anybody else heard of anything about batteries causing troubles with the hybrid batteries?
     
  2. sam spade 2

    sam spade 2 Senior Member

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    Disconnecting it may not be enough.
    The magnet is a permanent one; no difference connected or disconnected.
    Might need to relocate it.
     
    pghyndman likes this.
  3. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

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    The subwoofer magnet is still there, you know.

    A pro stereo shop can put a dummy load across the sub output of your amp. (you might be able to DIY but it's an odd thing to have) This will cause the amp to load up and stress itself as if driving an actual speaker... just not the one in your car. That way you can learn if the amp is generating interference, or if the sub is shaking the connectors momentarily loose in that crazy wire loom on the prime battery or some other thing. Narrow it down like that.
     
  4. TMR-JWAP

    TMR-JWAP Senior Member

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    I have had only ONE call back on a job. Could never duplicate the problem, but customer had "customized" his stereo system and had quite the pair of large speakers just sitting on top of the HV battery cover panel (Gen 2). Moved them to the back seat and never experienced the problem again. Related? We'll never really know for sure, but I have a habit of not putting magnets anywhere near computer stuff.
     
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  5. covrc

    covrc Junior Member

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    I could’ve been more clear, the subwoofer was a quick disconnect now sitting on the backseat, not connected, and I’ve had no reoccurrence of the issue.
     
  6. covrc

    covrc Junior Member

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    #6 covrc, Nov 21, 2020 at 6:51 PM
    Last edited: Nov 21, 2020 at 10:28 PM
  7. covrc

    covrc Junior Member

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    I understand the perspective of putting a dummy load on, and I like that idea. I’m just gonna sit tight for now and just use the fronts with no sub. I have Hertz Millie Legends, Hertz DSP and an Audison 5 channel amp.
     
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