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Am2 fuse blown, p3018 and p0420

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Mahal, Sep 14, 2020.

  1. Mahal

    Mahal Junior Member

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    I was driving and p3018 code pop up, I already were dealing with the hybrid battery modules, so I imagine I didn't replace all the modules were bad. But when I was parked suddenly the prius shut down and the power button didn't do anything, the am2 fuse was blown so, I wanted to know if the hybrid battery dead could be the cause the damage fuse.

    Posted via the PriusChat mobile app.
     
    #1 Mahal, Sep 14, 2020
  2. SFO

    SFO Senior Member

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    #2 SFO, Sep 14, 2020
    Raytheeagle, bisco and Mahal like this.
  3. Mahal

    Mahal Junior Member

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    .
     
    #3 Mahal, Sep 14, 2020
  4. Mahal

    Mahal Junior Member

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    Well, I can't even start the car.
    And, last year I change the coolant pump
    Posted via the PriusChat mobile app.
     
    #4 Mahal, Sep 14, 2020
  5. bisco

    bisco cookie crumbler

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    did you replace the fuse?

    was it an oem pump?
     
    #5 bisco, Sep 14, 2020
  6. Mahal

    Mahal Junior Member

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    I haven't replace it, yet
    Yes, it is oem pump
    Posted via the PriusChat mobile app.
     
    #6 Mahal, Sep 14, 2020
  7. bisco

    bisco cookie crumbler

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    make sure it is workong per sfo above
     
    #7 bisco, Sep 14, 2020
  8. SFO

    SFO Senior Member

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    Using a voltmeter/multi-meter, what does the 12v battery voltage read?

    You may need to charge the 12v to get the vehicle to turn on, which will then allow the HV battery to start the ICE.
     
    #8 SFO, Sep 14, 2020
  9. Mahal

    Mahal Junior Member

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    I just buy a new 12v battery two weeks ago
    I ask before if the car can start with de Hybrid battery under 200v, and people answer me that, it will not start. But I want to be sure if a fuse could be burnt for saving the battery from damage. Just to discard other problems.
    Posted via the PriusChat mobile app.
     
    #9 Mahal, Sep 14, 2020
  10. SFO

    SFO Senior Member

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    Disconnect the inverter coolant pump (picture below), and then replace the AM2 fuse, does the vehicle start?

    Be sure to replace and reconnect the inverter coolant pump before driving again.

    [​IMG]
     
    #10 SFO, Sep 14, 2020
    Mahal and Raytheeagle like this.
  11. Mahal

    Mahal Junior Member

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    Yes, it was the coolant pump...again.
    But, I'm upset because It's the second time it happens.
    What can I do to prevent it burn again?

    Thanks for your help
    Posted via the PriusChat mobile app.
     
    #11 Mahal, Sep 19, 2020
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  12. SFO

    SFO Senior Member

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    Not sure there is anything you can do, beyond using OEM parts and purging the inverter coolant loop of air.

    That failed pump should be covered by a one (1) year warranty at the dealership, get a free replacement.
     
    #12 SFO, Sep 19, 2020
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