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P2601 troubles coolant storage pump

Discussion in 'Gen 2 Prius Technical Discussion' started by Ice D, Sep 28, 2018.

  1. Ice D

    Ice D Junior Member

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    2005 Prius.

    So my coolant strorage pump was leaking coolant. I replaced it with a new dorman unit. Pump will still not run. I need help identifing the pins to jump at the relay and where the fuse for the relay is located.
     
    #1 Ice D, Sep 28, 2018
  2. SFO

    SFO Senior Member

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    Pretty sure this is what you're looking for :

    https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/Prius%20Service%20Manuals%202004/%E4%BF%AE%E7%90%86%E6%89%8B%E5%86%8C/04pruisr/05/2054m/cip2601.pdf

     
    #2 SFO, Sep 28, 2018
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  3. Ice D

    Ice D Junior Member

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    Ok,found the fuse, it was seemingly hiden only identified by an asterisk. Fuse was blown.
     

    Attached Files:

    #3 Ice D, Sep 28, 2018
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  4. Ice D

    Ice D Junior Member

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    Swapped the fuse with highbeam fuse. I think pump is running. I would like to bleed the system since I had a leak. Which pins do I jump to run the pump.
     

    Attached Files:

    #4 Ice D, Sep 28, 2018
  5. Ice D

    Ice D Junior Member

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    I found different pictures online and a video but had a hard time seeing the pins being connected.
     
    #5 Ice D, Sep 28, 2018
  6. Ice D

    Ice D Junior Member

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    Anyone know what connections to jump to run the coolant storage tank pump?
     

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    #6 Ice D, Sep 28, 2018
  7. SFO

    SFO Senior Member

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    Though @TMR-JWAP already answered this in your other thread.

    In the past I've power cycled the vehicle off, listened for the 'Coolant Heat Storage' pump to turn on and eventually stop (seconds later), then power the vehicle back on, rinse and repeat until satisfied.
     
    #7 SFO, Sep 29, 2018
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  8. Ice D

    Ice D Junior Member

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    So the pump runs when I jump the relay. But the pump doesn't operate during normal circumstances. I swapped the coolant pump relay with the heater relay thinking the relay was bad. But pump is still not running at all. Kinda stumped.
     
    #8 Ice D, Sep 30, 2018
  9. Ice D

    Ice D Junior Member

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    What now? Do I test the circuit from ecu to relay?
     
    #9 Ice D, Sep 30, 2018
  10. SFO

    SFO Senior Member

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    Are there any thrown DTCs?

    Do you have a copy of techstream which will allow you to view the freeze frame data?

    Without knowing more, I would start from the beginning of the above posted PDF and follow as much of the workup as possible. Including checking and testing the relay, the connectors and the CHS coolant tank outlet temperature sensor.
     
    #10 SFO, Sep 30, 2018
    Last edited: Sep 30, 2018
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  11. Ice D

    Ice D Junior Member

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    I have no techstream data.

    So I reset the p2601 code after changing the pump Friday. The system is not ready yet, "insufficient temperature". Could the cooling system need to be filled and bled for temperature to register. I'll try test the temp sensor.
     
    #11 Ice D, Sep 30, 2018
  12. audiodave

    audiodave Active Member

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    If there's a air pocket on the sensor that would affect the reading.

    Posted via the PriusChat mobile app.
     
    #12 audiodave, Sep 30, 2018
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  13. Ice D

    Ice D Junior Member

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    Good to know I will bleed the system
     
    #13 Ice D, Sep 30, 2018
  14. Ice D

    Ice D Junior Member

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    I don't know if the 3way valve is opening. Ran the car with heat on, burping the hoses and cycling the storage pump. There is still air in the system but its slow going. Temp is around 150°. Is the a bleed valve to open to make this quicker?
     
    #14 Ice D, Sep 30, 2018
  15. Raytheeagle

    Raytheeagle Senior Member

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    There is a bleed valve on the drivers side of the radiator at the top:).

    You’ll need an Allen key to open it, but it’s there and you can see the hole to get the Allen key in once you remove the black plastic shroud on the radiator;).

    Good luck and keep us posted (y).
     
    #15 Raytheeagle, Sep 30, 2018
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  16. Ice D

    Ice D Junior Member

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    Thanks
     
    #16 Ice D, Sep 30, 2018
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  17. Ice D

    Ice D Junior Member

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    Just fluid came out of the bleed valve. Took it for a spin to check temps. Got up to 195° under load down to 180° cruising. Going to see if more air will bleed out

    Posted via the PriusChat mobile app.
     
    #17 Ice D, Sep 30, 2018
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  18. Ice D

    Ice D Junior Member

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    Obd is still saying"insufficient temperature". Running in open loop.

    Posted via the PriusChat mobile app.
     
    #18 Ice D, Sep 30, 2018
  19. Ice D

    Ice D Junior Member

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    Any trick to opening the 3way valve?
    I'm stumped why is there insufficient temperature?
    After the drive, coolant in the top hose and radiator cap were warm but not hot.

    Posted via the PriusChat mobile app.
     
    #19 Ice D, Sep 30, 2018
  20. SFO

    SFO Senior Member

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    How many miles do you have on this vehicle?

    A couple of forum members found blocked coolant systems from prior neglect or wrong fluid replacement, might be something to consider.

    Do you have a code reader that is Toyota Hybrid compatible?

    Did you have a chance to check the CHS temp sensor or run through the workup contained in the above PDF ??
     
    #20 SFO, Oct 1, 2018
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