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P3125 info 304 - damaged wiring harness after inverter/converter pump failure

Discussion in 'Gen 2 Prius Technical Discussion' started by Sisterwrath, Nov 30, 2011.

  1. Sisterwrath

    Sisterwrath New Member

    Joined:
    Nov 30, 2011
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    Location:
    Indiana
    Vehicle:
    2005 Prius
    Model:
    N/A
    I accidentally necroed a thread at that location and have pasted my post here (which I believe is the correct place)

    I burnt up my inverter/converter cooling pump which then damaged the wiring harness in the main engine room (likely because I pulled an idiot move and replaced the fuse that was blown with a higher amp fuse to limp about a mile after the first fuse blew). I had the pump replaced and the wires going from the fuse box to the pump replaced, since the dealership wanted $4000 to replace the entire wire harness (the rewiring and replacement pump still ran $1000). So now I have the P3125 info 304 code. These are the only codes that it is throwing. It will start, but it shuts down after about 30 seconds. The coolant pump has been verified at the dealership to be in good working.

    I was hoping to get some direction on the possibility of repairing this myself. I do not have the funds to drop $4000 on a car that I bought used for $4000 and I would dearly love to continue driving it.

    I was confused as to what to disconnect to test this wire and exactly what the procedure would be to test it. Am I checking the wire against the body of the car or am I supposed to check it against the other wires in the bundle? If I do find that it's shorted, how feasible would it be to replace that run of wiring? I looked at some schematics and it seems like a long run from the inverter/converter to the ECU.

    Any assistance would be immensely appreciated!
     
  2. seilerts

    seilerts Battery Curmudgeon

    Joined:
    Mar 7, 2010
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    1,512
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    Location:
    Santa Fe, NM
    Vehicle:
    2005 Prius
    P3125 is a Gen 1 code. If yours is a 2005, whoever gave you the diagnosis messed up completely. Don't go back.

    Get your car down to AutoBeYours in Scottsburg. If it needs an inverter, they've got one. If it needs wiring or other repairs, they'll be able to figure it out.

    We are located at 861 S Gardner St. Scottsburg Indiana 47170
    812-752-5050
     
    1 person likes this.
  3. jelloslug

    jelloslug It buffed right out!

    Joined:
    Jun 11, 2008
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    Location:
    Greenville, SC
    Vehicle:
    2008 Prius
    You need to get a subscription to the Toyota Information Service and take a look at the wiring diagrams. They have a list of part numbers for all the connectors and pins for every connector and you can buy them individually from Toyota.