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2005 prius weird behavior. It won't start.

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Fedejunin, Aug 21, 2019.

  1. bisco

    bisco cookie crumbler

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    can you jump it from another car to see what happens? your battery is close to failing, so it would be smart to eliminate it as a possibility, before diving headfirst into the hybrid battery
     
  2. Fedejunin

    Fedejunin Junior Member

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    Ponte Vedra
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    2005 Prius
    Model:
    ----USA----
    Battery was checked at the shop. It shows good voltage. Also o tried to jump it from another car and nothing happens.
    I have a agm battery charger, so I diddid cha it to 100% last night. Nothing changed.
     
  3. bisco

    bisco cookie crumbler

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    it looks like some sort of short, maybe a loose wire or bad solder joint behind the dash?
     
  4. Fedejunin

    Fedejunin Junior Member

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    I don't know. I am trying to find a guy that share inia forum the same problem years ago, unafortunatel he didn't post how he solve it.
     
  5. Fedejunin

    Fedejunin Junior Member

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    ----USA----
    2 Toyota's retired mechanic saw the car, they couldn't identify the problem, at least they didnt charge me anything. Tomorrow the car will have a full inspection at the Toyota dealer. I tried everything but take it to the source. I know they will want to replace everything electronic just to be sure. I will post what was the problem next week. No one, absolutiley no one in 3 differents Toyota pages have hear of a problem like I have.
     
  6. Patrick Wong

    Patrick Wong DIY Enthusiast

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    Vehicle:
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    Two
    The following are the suspect areas since the Prius will not become IG-ON:

    Power source control ECU
    AM1 fuse
    AM2 fuse
    IG1 relay
    IG2 relay
    Wire harness
     
    donbright likes this.
  7. TMR-JWAP

    TMR-JWAP Senior Member

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    The way everything is flickering it sure does sound like it could be a relay chatter type issue. Would be nice if that's all it is.
     
  8. Fedejunin

    Fedejunin Junior Member

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    ----USA----
    To everyone. Finally I have the car running again. The problem was the ecu, it was fried. Main reason OBD didn't work. I bought a used ecu from.ebay ($25) . replaced it. I had to reset it and the car just started. After that I had errors with brake, abs and vtc. A mechanic wanted to charge me around $2000 to replace all the brake system, trying to sell me that this is a comĂșn problem. I did not pay for that, instead I used my foxwell nt520 and I reinitialized the brake system. No more warning lights, car drives perfect.
     
    chaosphere, donbright and bisco like this.
  9. bisco

    bisco cookie crumbler

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    wow, congrats and well done!(y)
     
  10. chaosphere

    chaosphere Junior Member

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    What was the procedure to reset the ECU please ?
     
  11. Archway

    Archway Junior Member

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    Vehicle:
    2005 Prius
    Model:
    ----USA----
    I had the boxes also and tried replacing the ECU and it didn't work. For future people with similar problems, be sure to check easy stuff like the AM-2 fuse before pulling apart the whole dashboard to get out the ECU like I did. o_O