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AM2 Fuse codes U0100 P3000 C1310 C1259

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by saviorcrash, Apr 27, 2021.

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  1. saviorcrash

    saviorcrash Junior Member

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    I have a 2009 Prius with 147k miles. It keeps blowing the AM2 fuse. I already did the Inverter pump disconnect test and still blows the fuse. I also hooked up two other inverter pumps and still blows the fuse. I put a 30 amp fuse in there and I get dash lights but no engine start and I get ready mode for maybe a half of a second then back off it goes.. I plan on changing the inverter next to see if that's what the problem is. with 30 amp fuse in and dash lights on I get codes U0100 P3000 C1310 C 1259. Anyone else ever deal with this problem?
     
    #1 saviorcrash, Apr 27, 2021
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  2. saviorcrash

    saviorcrash Junior Member

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    I am very familiar with the Prius. I have the Hybrid orange plug seated correctly. Ive checked all other fuses they are fine. The 12volt battery is new and charged, I also keep a jump pack on when attempting to power it on. If I have a 15 amp fuse in the AM2 slot, the fuse instantly blows right when the power button is pressed.
     
    #2 saviorcrash, Apr 27, 2021
  3. TMR-JWAP

    TMR-JWAP Senior Member

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    I am very familiar with the Prius.

    Have you reviewed the wiring diagram to determine all the loads supplied by the AM2 fuse? It supplies quite a bit more than just the ICWS. I think there may even be an old post here somewhere for that. hmm..that thread may have been for the DOME fuse. regardless, a wiring diagram needs to be in your future or you're probably going to spend a lot of time chasing your tail.
     
    #3 TMR-JWAP, Apr 27, 2021
  4. saviorcrash

    saviorcrash Junior Member

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    Ok that was a nightmare but I figured it out today. Thanks though
     
    #4 saviorcrash, May 1, 2021
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  5. mr_guy_mann

    mr_guy_mann Senior Member

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    #5 mr_guy_mann, May 2, 2021
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  6. Chowly

    Chowly New Member

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    Hello Saviorcrash, I am having similar symptoms after I assumed the inverter pump burnt up due to heavy mountain driving. I replaced the pump, and the AM2 fuse continues to blow, even with the pump unplugged... What did you ultimately find as a solution? I am starting to think it is possible that some of the wires somewhere else on the AM2 circuit are shorting or perhaps the Integration Relay C (82641-47020) that the AM2 fuse is located on is failing somehow.

    Any info you can provide would be greatly appreciated in helping me find a fix!
     
    #6 Chowly, Sep 15, 2022
  7. saviorcrash

    saviorcrash Junior Member

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    Did you figure it out?
     
    #7 saviorcrash, Oct 15, 2022
  8. jenesuispasbavard

    jenesuispasbavard Junior Member

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    How did you fix it? I'm getting the same codes (U0100, P3000, C1259, C1310), but my AM2 fuse is fine.
     
    #8 jenesuispasbavard, Mar 15, 2024
  9. dolj

    dolj Senior Member

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    You have more codes that just those, so whatever scanner you are using cannot read all the Prius' ECUs.

    Here is a thread that reviews several scanners and their capabilities.

    U0100 is lost comms with the ECM, so I suspect you have a power supply issue with power arriving at the ECM. Have you checked all the fuses for continuity with an ohmmeter?
     
    #9 dolj, Mar 15, 2024
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