Gen 1 prius battery code p3030 all wires are good.

Discussion in 'Generation 1 Prius Discussion' started by jtr12345, Jan 17, 2020.

  1. jtr12345

    jtr12345 New Member

    Joined:
    Jan 17, 2020
    2
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    Location:
    RI
    Vehicle:
    2002 Prius
    Model:
    One
    Long story short......
    I just replaced a module in my gen 1 prius battery. One module was bad and the new one fixed that issue but when i reinstalled I received the p3030 and then a p3001 code. I reset the codes and started up again and only received the p3030 code indicating a hv wire has snapped. I've check continuity on all the connectors on the battery and they all seem to allow current to flow through so i'm leaning towards it not being a wire??? One of the nuts that holds the module to the case did snap off while reinstalling but i thought those were literally just to hold the modules in place? I didn't think they had anything to do with current unless they are required for grounding?

    Questions:

    1. Do the nuts that hold the modules to the case from the bottom have anything to do with continuity and could that be what is throwing the p3030 code?

    2. What is the best way to test the hv wires that monitor the battery voltages? I simply checked continuity between the crimp on the wires to the rest of the copper connecting plates and the ends of the battery terminals. Current was flowing between all of them although there were a bunch that were corroded but nothing that stopped my volt meter from sounding off.

    3 Could the p3001 code be setting the p3030 or visa versa? It's hard for me to believe the battery ecu has gone bad seeing as it has never given me any problems and was working fine up until I replaced a module.

    Any help or tips would be appreciated. Thank you!
     
  2. jtr12345

    jtr12345 New Member

    Joined:
    Jan 17, 2020
    2
    0
    0
    Location:
    RI
    Vehicle:
    2002 Prius
    Model:
    One
    Update........ Solved

    I replaced the entire bar holding the hv wires and it fired right up.

    So.....
    1. Apparently the nuts that hold the battery from underneath do just that and only that.
    2. I don't know the best way to test the HV wires because all of them tested fine with voltage and continuity from the crimp to the battery terminals but still threw the p3030. I guess it's possible one of the wires was damaged in a place I couldn't see?
    3. The p3001 code never came back so I don't know where it came from or why.
     
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