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Prius Died revived but brain dead

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Stanlea, Dec 2, 2019.

  1. Stanlea

    Stanlea New Member

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    Hi one of our Prius died Gen 2 2007 while driving blacked out no power, replaced inverter pump and blown AM2 fuse, car alive, turned off, to bleed cooling lines turned back on all dead again, held the start button on for 45 sec's, 12 volt power is back, no ready light, all gear selector lights flashing, no speedo but odometer, tell tale lights on, have screen, outside temp reads E, no HV battery levels, can't read OBD2, only cheep one but reads our 2004 Prius, any idea's would be helpful trying to get this going without dealership mark up's
     
  2. PriusCamper

    PriusCamper Senior Member

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    When the weather heats up, the hybrid system starts failing... There's lots of things to check and can't list them all in one post so let's get started on the initial ones...

    Did you replace the pump based on what the error codes said? Also after you did pump repair, did the error codes change?

    An important next step is to inspect your hybrid cooling fan and clean it if it's clogged or dirty...

    Make sure you have a healthy 12v via this test:

     
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  3. TMR-JWAP

    TMR-JWAP Senior Member

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    This is a very good indicator that the 12v system is weak, normally due to a weak 12v battery, but could also be due to a crappy fuse being installed. If the 12v battery is fully charged, you may want to check/replace the AM2 fuse and it's socket again.

    Plenty of car problems have been traced back to "Harbor Freight type 100 fuses for a buck" Chinese fuses. Not saying that's what you have, but it does show that not all new fuses are good fuses, and a bad connection at the fuse is no different than any other bad electrical connection.
     
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  4. Stanlea

    Stanlea New Member

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    Hello there

    never read codes before car died, replaced inverter pump because AM2 fuse blown, cant read codes now, OBD not talking to car now, cooling fan works fine inspected it when replaced cells module in traction battery 11 months ago

    Cheers, Stanlea
     
  5. Stanlea

    Stanlea New Member

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    Hi there

    the fuse replaced is Ok pump works, all 12 volt system is working, car wont talk to reader, no ready light, screen outside temp reads the temp till gear selector lights all flash, then reads E, tell tale lights are on,

    is there any way to reset the car that any body knows, apart from disconnecting 12 volt battery, or holding the start button longer than 45 seconds,
    any ideas would be very helpful

    Cheers, Stanlea
     
  6. PriusCamper

    PriusCamper Senior Member

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    Is there power going to to the OBD2 reader even when car is off? That's the first step... If you have power going to the reader, and 12v system is fine, the weak link in the system is a faulty OBD2 code reader. Can you confirm the reader is working on a different vehicle?
     
  7. Stanlea

    Stanlea New Member

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    Hi there

    Yes works fine on our 2004 Prius, say's there are no code's, but on our 2007 say's connection failed try again.

    Cheers, Stanlea
     
  8. Stanlea

    Stanlea New Member

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    Hi there thank you for moving us to a different forum hope this draws more attention to help resolve our 2007Iworkhorses problem as this car gets me to Sydney when i need to once a week 500 km's round trip and I have to take Lea's 2004 Prius, and she has to drive the ute when I go I don't like stressing her, the ute air con don't work
     
  9. PriusCamper

    PriusCamper Senior Member

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    Wow... This is a tough one.... What exactly was going on when you were bleeding cooling lines? Any strange things? Did the car sit unattended during that time? Seems like whatever happened then is the source of the problem?

    Have you checked all the fuses yet? It's always a last resort time consuming task... But...
     
  10. TMR-JWAP

    TMR-JWAP Senior Member

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    The only way you're going to reset the car is to disconnect the 12v battery while the car is off.

    The fuse that you say is ok, is that the same fuse you originally installed after the pump replacement?
    • a faulty fuse (causing a high resistance, but not open) may allow the pump to run, but at the same time significantly reduce the voltage available on that circuit. That pump uses a DC motor, which would probably run even with 6 volts. On the other hand, I've seen the dash do what you describe when that circuit voltage was around 8.5 volts.
    • if you haven't truly verified the AM2 circuit is at proper voltage, that's what I would do first.

    Here's what I would do after verifying that:

    Get a known good 12v battery or jump pack.
    Connect it to the under hood jump point as if you need to jump start the car. This will provide solid 12v power at the fuse box.
    See if the problem went away.
     
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  11. Stanlea

    Stanlea New Member

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    Hi There

    I disconnect the battery when it sits for a while, but I did notice the battery is at 12.28 volts, when I Jumped to the ute went to 13.8 but the car still wont go to all the same symptoms as before
     
  12. Stanlea

    Stanlea New Member

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  13. Stanlea

    Stanlea New Member

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    Hi There

    the AM2 voltage is 11.7 when I jump to the ute is 12.8 with volts with the ute running this is all with the Prius turned off and fuse removed

    i have also tried other 15 amp fuses all fuse have 0 resistance, when the car sits for a while I disconnect the plugs off the battery,
     
  14. bisco

    bisco cookie crumbler

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    you should load test the 12v

    how are the connections at the battery, especially neg to ground?
     
  15. Stanlea

    Stanlea New Member

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    Hi there

    yes all good, I don't have a load tester, I will remove from car and go get it tested right now, shouldn't everything be working when it's jumped to the ute though.
     
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  16. bisco

    bisco cookie crumbler

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    sometimes, the original battery is causing a short that can't be overcome with a jump.

    just a guess though, until a better idea comes along

    you can measure the voltage with the car off, then turn the headlights on and watch the drop
     
  17. Stanlea

    Stanlea New Member

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    Hi There

    I just started removing battery and its a super charge with battery indicator which is showing green which reads Ok, but i think a load test is a good idea, is there a possibility that all computers are not communicating for some reason
     
  18. bisco

    bisco cookie crumbler

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    oh yes, there are a lot of possibilities. could be a bad board, or corroded connectors
     
  19. Stanlea

    Stanlea New Member

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    so I might have to tow to toyota dealer, I was trying to be optimistic, to fix the problem with all the collective knowledge of Prius Chat and myself
     
  20. bisco

    bisco cookie crumbler

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    it could still happen, but without a known 12v and obd reader, we're grasping at straws