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Check hybrid system

Discussion in 'Gen 3 Prius Technical Discussion' started by Massimo Pirrone, Sep 5, 2022.

  1. Massimo Pirrone

    Massimo Pirrone Junior Member

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    Hello I recently swapped the engine on my Lexus ct200 which is identical to the gen 3 Prius. Everything went good and it drives well but I am now getting a “check hybrid system” message along with my AC not working. Any clue what it could be?
     
    #1 Massimo Pirrone, Sep 5, 2022
  2. JC91006

    JC91006 Senior Member

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    there should be codes you can pull up, it'll point you closer to the problem than using a crystal ball
     
    #2 JC91006, Sep 6, 2022
  3. bisco

    bisco cookie crumbler

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    see if there's any movement in the inverter coolant reservoir
     
    #3 bisco, Sep 6, 2022
  4. Massimo Pirrone

    Massimo Pirrone Junior Member

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    P0AA6-526-614 Is the code
     
    #4 Massimo Pirrone, Sep 7, 2022
  5. Massimo Pirrone

    Massimo Pirrone Junior Member

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    P0AA6-526-614 Is the code so it has something to do with the inverter is there a chance it got damaged during the installation
     
    #5 Massimo Pirrone, Sep 7, 2022
  6. bisco

    bisco cookie crumbler

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    Could be a pinched wire or loose connection
     
    #6 bisco, Sep 7, 2022
  7. bisco

    bisco cookie crumbler

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    #7 bisco, Sep 7, 2022
  8. ChapmanF

    ChapmanF Senior Member

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    That was a Gen 2-specific thread, and this is a Gen 2-specific diagram, but for Gen 3 it is still close enough to show which parts of the system are implicated by the 614 code.

    [​IMG]

    As you can see, 614 covers everything from the load-side terminals of the main relays in the battery to the boost converter and DC busses in the inverter assembly.

    What changes in Gen 3 is the A/C inverter moves out of the inverter assembly and into the A/C compressor itself. So the 614 area also covers the cable running over to the compressor, and 611 would only involve components internal to the A/C compressor.

    526, as you can see, refers to everything; it is just the "whoops, there's leakage somewhere" code that the car sets before it figures out where and sets the other code.
     
    #8 ChapmanF, Sep 7, 2022
  9. Massimo Pirrone

    Massimo Pirrone Junior Member

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    Update: I couldn’t figure it out ended up taking it to a hybrid specialist over here in San Diego. He tried replacing the inverter and the code still showed. He said he’s going to try to replace the A/C compressor and if that’s not it, maybe the frame wire got messed up during the engine installation. I’m over it
     
    #9 Massimo Pirrone, Sep 8, 2022
  10. ChapmanF

    ChapmanF Senior Member

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    A shop that didn't want to proceed by swapping and reswapping of parts would ordinarily use a megohmmeter to look for the problem, in the area covered by code 614, and then repair the problem that's found.
     
    #10 ChapmanF, Sep 8, 2022
  11. Massimo Pirrone

    Massimo Pirrone Junior Member

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    Update 2: changed the A/C compressor everything seems good now no lights as of yet drove a decent amount. And the AC is nice and cold. Was a lot weaker prior to everything happening. Wish me luck ($1000 total) let’s see how it goes.
     
    #11 Massimo Pirrone, Sep 9, 2022
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  12. bisco

    bisco cookie crumbler

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    all the best!(y)
     
    #12 bisco, Sep 9, 2022
  13. Massimo Pirrone

    Massimo Pirrone Junior Member

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    long term update : 20k miles with the new engine and everything is working great.
     
    #13 Massimo Pirrone, Feb 11, 2023
    CR94, bisco and ASRDogman like this.
  14. bisco

    bisco cookie crumbler

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    congrats!
     
    #14 bisco, Feb 11, 2023
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