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Inverter pump contol valve burned out

Discussion in 'Gen 2 Prius Main Forum' started by Phoenix300, Aug 13, 2023.

  1. Phoenix300

    Phoenix300 New Member

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    Hello. First post. But i don't thin anyone has covered this.
    I recently replaced my engine and inverter water pumps along with the control vale at 160000mi. I put some coolant in it and drove to a local place a few block to do a coolant flush because i didn't want to mess up bleeding the system. Didn't double check the technician work and after i drove a bit the check engine light came back on and i saw only the engine tank had been refilled. I put new coolant in the inverter side and bleed the system my self after this.

    its been about 50mi since than and the check light hasn't gone off with code p1121. Is there a way to tell if I burned out the new part already? Its my fault mostly because I didn't check but it is frustrating to think my neglect burned out a part that can last 150kmi in a day right.
     
  2. Tombukt2

    Tombukt2 Senior Member

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    Clear code .. run car get it warm then see if you got coolant valve working ? If it's blown get a used from LKQ or such . 20 bux..
     
  3. dolj

    dolj Senior Member

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    Driving the car a few blocks likely didn't do anything adverse.

    You need to clear the code. If it comes back you need to look into it further but most likely once you clear the code, everything will be golden.
     
  4. ChapmanF

    ChapmanF Senior Member

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    Just so future readers don't get the wrong idea: there is no such thing as an "inverter pump control valve".

    The engine cooling system and the inverter/transaxle cooling system are separate. There is an inverter pump, part of the inverter system, and a coolant control valve, part of the engine system. The two things are near each other, over behind the left headlight, but if you follow the hoses, they have nothing to do with each other. They belong to separate systems.
     
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  5. Tombukt2

    Tombukt2 Senior Member

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    No but while you are here I thought it was interesting to note that the output of my inverter pump that hose goes up to the little spa pump looking thing right next to the brake accumulator and pump on my generation too and from there it shoots over to I don't know where so the output of the inverter pump goes to the input of this other pump which is about 8 in away semi uphill and then it's pumped out of that pump to I'm not sure I didn't follow the hose so then when does the upper pump next to the brake affair come in and out what controls it so I guess it moves the water faster than the inverter pump does when something tells it it needs to?
     
  6. pasadena_commut

    pasadena_commut Senior Member

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    Running the inverter pump with no coolant will damage it eventually. The fluid cools it - no fluid and it can get really hot, maybe even melting inside. Not sure if "a few blocks" would be long enough to do catastrophic damage, but I wouldn't expect to get a long life out of that pump now. Also not clear from your post if the inverter loop was empty going to the shop or coming from it.

    In any case, P1121 isn't the inverter pump, it is the 3 way valve.
     
  7. ChapmanF

    ChapmanF Senior Member

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    Either you fooled yourself trying to follow that hose, or someone has worked on your Gen 2 and royally mixed up the hose routing.

    In the inverter/transaxle cooling circuit, there is only one pump, the one near the headlight.

    The pump up closer to the brake business is part of the engine cooling system. It's the one that keeps heat flowing to the cabin heater when the engine's not running (because your Gen 2 engine water pump is belt-driven).

    There is no hose connection between those two systems, unless somebody has messed yours up.

    There is a hose from the coolant control valve (also down there by the headlight) going back toward the heater. That's how it's supposed to be. The coolant control valve is part of the engine cooling system.
     
  8. Tombukt2

    Tombukt2 Senior Member

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    Okay that's interesting I'll take some pictures I have an '05 and '09 and now a new 07 and I'm swearing to God all three of them are the same I know two of them are I just had them apart and I put them exactly back together like I took them apart. And I just replaced the ladies break actuator on an '05 while I had the mess apart I took a picture of that one too same pump same hose I thought it was extremely weird and I'll take a few pictures in the junkyard but it usually pretty complete when I get there as far as I know I'm going to go out and look right now actually.
     
  9. Tombukt2

    Tombukt2 Senior Member

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    I got some pictures I would love to send you copies of all five of these cars they're not mine only three of them are mine are connected I believe just like this I'm going out to look at the car I have a part right now just to make certain and I swear to God I'm not fooling myself I'm using the magenta paint that's on the hose to follow it and it's clearly attached to the firewall You just run your finger along the thing there's nothing in its way It just drops right down to the inverter pump and I believe it's being pumped right to that other pump I'm yeah okay.
     
  10. Tombukt2

    Tombukt2 Senior Member

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    Welp I guess it's routed wrong then holy be Jesus