2007 prius wont start after hybrid battery repair

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by waveposer, May 19, 2020.

  1. waveposer

    waveposer New Member

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    It all started with the red triangle and purple battery lights when first starting Prius. I read many post and took out hybrid battery. I found and replaced 1 battery that was reading lower voltage ( 6.6) when all the rest where 7.8. I completed load test on all the batteries with a headlight bulb. Balanced battery overnight, all cells reading 7.65 or 7.66. Installed hybrid back and now I have 214 volts at the battery but car will not start, all lights on including red triangle on. Battery symbol on displays showed around 4 blue bars. Car will shift into N if that means anything. I took side cover off hybrid battery and turned car on. I am not getting any voltage past where the batteries connect to Relays ?. I don't have schematic off any kind. I am very comfortable TS electronic/electrical issue. I have not pulled any codes yet.
     
  2. JC91006

    JC91006 Senior Member

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    You probably forgot to lock the orange interlock device on your battery

    upload_2020-5-19_22-15-2.jpeg
     
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  3. SFO

    SFO Senior Member

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    Welcome to PriusChat!!

    Can you post some pictures of the HV battery, including the relay/ecu area.
     
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  4. waveposer

    waveposer New Member

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    Orange jumper in
     
  5. waveposer

    waveposer New Member

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    upload_2020-5-20_16-56-14.png
    here is picture
     
  6. JC91006

    JC91006 Senior Member

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    Looks like you haven't bolted the battery down to the car chassis. You need at least a couple bolts in
     
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  7. SFO

    SFO Senior Member

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    Only one exposed hole there, and I was still playing where's waldo :rolleyes:
     
  8. Phillip Griffith

    Phillip Griffith Junior Member

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    Having seen your post ;I dont see a final answer. Any update to your problem?
     
  9. edthefox5

    edthefox5 Senior Member

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    It will throw a code if that grounding bracket is not installed across the 2 leads where they enter the battery box but maybe he took that apart just to measure dc.
    If it was bolted all up and still not starting it may have a corroded battery ecu plug or a broken or rotted temp sensor.
    Pulling the codes it’s throwing will tell u why it’s unhappy.
     
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  10. Mycaleum

    Mycaleum New Member

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    Happened to me. Push it in and then slide it down. Then cycle the ignition a few attempts and it'll sort it out.
     
  11. Phillip Griffith

    Phillip Griffith Junior Member

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    Previous owner cut the grounding strap , I will make certain that it is reconnected firmly my next attempt at starting the car. My discussion is in Prius Gen 2 "What's wrong with this procedure?"
     
    #11 Phillip Griffith, Nov 28, 2020
    Last edited: Nov 28, 2020
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  12. rodri9o

    rodri9o Junior Member

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    ....who does that....
     
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