Check Hybrid System - Inverter

Discussion in 'Gen 3 Prius Technical Discussion' started by Dario Beltran, Feb 10, 2017.

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  1. Dario Beltran

    Dario Beltran Junior Member

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    Santa Isabel, Puerto Rico
    Vehicle:
    2011 Prius
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    N/A
    Several weeks ago my car (Prius 2011) turned on the hybryd system check. With the help of several You Tube videos I took out the battery, checked the voltage of each module using a 20V bulb and all were well in the range of 7.7V and 7.8V. I reinstalled the battery on January 16, 2017 and ran perfect until the 4th of February that turned on again several lights and the check hybryd system. The car kept running without any problems except all the lights on. After reading several Prius chat I decided to buy an inverter in the junker (2013) and install it. At the end of the installation, again switched on all the lights with the check hybryd system and never start the engine. I thought that the junker inverter was more damaged than the original, so I placed the original again and this time it was the same as the one I bought in the junker. All lights on, with hybryd system check message and do not start engine. I checked the main switch of the hybrid battery several times to make sure it was connected because the first time I worked with the battery, that happened and I just pressed the main switch and that's it. I added the pink liquid to full level to the inverter reserve. I know you will ask me what code I got on the OBD2 and I have to tell you that I am about to buy one OBD2 soon (any suggestion of what to buy is welcome). I used the disconnection of the 12V battery method to clear codes. I know is maybe just a detail that I missed and that's why I can't turn on my car. Any ideas what else can I do to turn on my car?
     
    #1 Dario Beltran, Feb 10, 2017
  2. jdcollins5

    jdcollins5 Senior Member

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    Be sure that you get an OBDII reader that can read Prius specific codes. Most will only read the engine and emissions codes and not the specific codes for the HV Battery and associated equipment.

    Techstream is the gold standard and you can find the mini-VCI but you will need a laptop.
     
    #2 jdcollins5, Feb 11, 2017
  3. Dario Beltran

    Dario Beltran Junior Member

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    2011 Prius
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    I got the following codes from OBDII: P0A09, P0A0D, U0110. Now with that information, any idea what's wrong with my car? Thanks
     
    #3 Dario Beltran, Feb 11, 2017
  4. jdcollins5

    jdcollins5 Senior Member

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    P0A09 - DC/DC Converter Status Circuit Low Input
    P0A0D - High Voltage System Inter-lock Circuit High
    U0110 - Lost Communication with Driver Motor Control Module

    Most likely your orange Safety Switch is not closed properly. After rotating 90 degrees you have to slide it to lock it and to make the control switch.
     
    #4 jdcollins5, Feb 11, 2017
  5. Dario Beltran

    Dario Beltran Junior Member

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    I finally got it. It was a plug with a lot of cables that the inverter has it at the left side, was not properly connected. I just opened a gray cover then connected and snap it. That was it. I'm running my car again. Thank you so much.
     
    #5 Dario Beltran, Feb 11, 2017
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  6. jdcollins5

    jdcollins5 Senior Member

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    Glad you have it running again!
     
    #6 jdcollins5, Feb 11, 2017
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  7. fopoku2k2

    fopoku2k2 Member

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    Location:
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    I have got the same codes after swapping a new engine. can you give me a detailed instructions on how you fixed it?
     
    #7 fopoku2k2, Mar 21, 2017
  8. Garyprius

    Garyprius New Member

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    Hi i have the same problem U0110, that location of this plug with a lot of cables?
     
    #8 Garyprius, May 1, 2018
  9. SirParker77

    SirParker77 Junior Member

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    2010 Prius
    Model:
    ----UK----
    I've got the same problem, but the plug won't click into place on the new (used) inverter.
    Going to try putting the old one back on to test if it's a fault with the new inverter connection.
    Is there a special way to install this plug?
    Mine pushed in and the grey bar? Doesn't clip in and then the plug is loose.
     
    #9 SirParker77, Aug 21, 2023
  10. SirParker77

    SirParker77 Junior Member

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    Just been out to the car and the harness doesn't clip into place as the grey clip has snapped, so not locking.
    Does anyone know what this is called to try and get a replacement?
     
    #10 SirParker77, Aug 21, 2023
  11. SirParker77

    SirParker77 Junior Member

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    Just been out to the car and the harness doesn't clip into place as the grey clip has snapped, so not locking.
    Does anyone know what this is called to try and get a replacement?
     
    #11 SirParker77, Aug 21, 2023
  12. gallagher2201

    gallagher2201 New Member

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    I have the same exact problem. Did you ever solve the broken clip issue?
     
    #12 gallagher2201, Nov 30, 2024
  13. rzk

    rzk Junior Member

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    hi? i am having the same issue. i removed the inverter to replace pump and now can doesn't' want to start. i have same ecu codes.

    please what is the trick to put back that grey plug until it lock or latch or click. please share which method you used or how you went about it and how it fixed your problem
     
    #13 rzk, Apr 1, 2025
  14. Brian1954

    Brian1954 Senior Member

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    See post #5.
     
    #14 Brian1954, Apr 2, 2025
  15. rzk

    rzk Junior Member

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    Hi? I have open that grey cover. At times when you open it, it will stock and not wanting to come back to it neutral position. It's not snapping like it is in place.
     
    #15 rzk, Apr 3, 2025
  16. papah

    papah New Member

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    Three
    update on the grey clip. in order to install that clip until it snap in place. make sure you remove all bolts or plastic push down holding that bundle of wire. when the entire wires are free and lose, pull the grey clip handle all the way away from the adapter where the cable are in . now push the adapter into the inverter and push in the grey clip toward the inverter and you will hear it snap. that clip has two sliding tab that must slide into the groove in the inverter for it to snap in place. the grove is on the right side. there are two adapters, the big one and small one. the grove are on the side where the small head goes into. I fixed my car and it now running.
     
    #16 papah, Apr 6, 2025
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