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Burning Smell + Main Relay + Help? Photos!

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Bigbob22, Jul 27, 2021.

  1. Bigbob22

    Bigbob22 New Member

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    Location:
    santa rosa, california
    Vehicle:
    2005 Prius
    Model:
    N/A
    So here is the deal--

    1. Burning smell most pronounced when driving uphill. Bad electronic burning smell. Took hybrid battery all apart to inspect everything and everything looked good (no burnt electrical connections). Put it back together but removed the rubber vent tubes (some people said that might be causing it and that they don't do anything.
    2. Drove for a couple more weeks and now started to smell burning smell again.
    3. Got a check engine code today. Car still drives good with good power but the check engine code makes it so it won't go into drive only neutral unless I clear the code.
    4. Codes I got: (see photo).
    5. Took hybrid battery apart again and noticed a fried connection at one of the power relays.

    Do you guys think just replacing the power relay might fix my problems? Or do I have bigger fish to fry?
     

    Attached Files:

    #1 Bigbob22, Jul 27, 2021
  2. Bigbob22

    Bigbob22 New Member

    Joined:
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    Location:
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    Vehicle:
    2005 Prius
    Model:
    N/A
    2005 prius

    codes and problem area attached. Any words of wisdom? Is this a transaxle failure?
     

    Attached Files:

    #2 Bigbob22, Jul 27, 2021
  3. JC91006

    JC91006 Senior Member

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    Wow did you take this apart before and didn't tighten the part down? Loose electrical connections can cause fires.

    I have a spare part with all the electronics (minus the ECU). $50. Hopefully that can solve your problem.
     
    #3 JC91006, Jul 27, 2021
    Last edited: Jul 27, 2021
    Raytheeagle likes this.
  4. rjparker

    rjparker Tu Humilde Sirviente

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    I declare you Master of the Obvious
    2A5BD26C-671A-4202-8047-7A6642D96E22.jpeg
     
    #4 rjparker, Jul 27, 2021
  5. PriusCamper

    PriusCamper Senior Member

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    I made this mistake once... Was juggling three different battery packs with two different cars while explaining Prius to person I was doing repair work for and forgot to tighten the bolt down, which popped off on the drive home. Soon as you swap out that bad relay, you should be ok.

    And maybe the relay was what went bad, not your lack of a tight connection?
     
    #5 PriusCamper, Jul 27, 2021
    Last edited: Jul 27, 2021
    BuildingInspectorBrian likes this.
  6. PriusCamper

    PriusCamper Senior Member

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    I replied to your other post about this...
     
    #6 PriusCamper, Jul 27, 2021
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