1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Engine water pump trouble

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Nikosak, Nov 26, 2018.

Tags:
  1. Nikosak

    Nikosak New Member

    Joined:
    Nov 26, 2018
    3
    1
    0
    Location:
    San Antonio Texas
    Vehicle:
    2010 Prius
    Model:
    III
    I had to add coolant to the reservoir and I forgot to replace the cup. and I drove for a few miles until the hybrid system was disabled. I assume the car lost coolant and overheated. I got the P261C code. Does that mean I damaged the water pump? Today I removed the water pump and it seems that I can turn the impeller with my hand easily. Is there a way I can test the pump by applying 12V and see if it turns? If so, anybody knows to which of the four leads inside the plug I should be applying voltage and the correct polarity?
     
    #1 Nikosak, Nov 26, 2018
  2. Raytheeagle

    Raytheeagle Senior Member

    Joined:
    Jul 1, 2016
    11,251
    15,476
    0
    Location:
    Bay Area, California
    Vehicle:
    2019 Prius Prime
    Model:
    Prime Plus
    Welcome to Prius Chat (y).

    I see from your profile you have a 2010, so this is in the wrong forum. I reported it for you so the Gen3 crowd will see it;).

    Some questions:
    • Any backstory to your tale?
    • How many miles on your Prius?
    • Have you checked the coolant level since the incident?
    • Do you have the pump out and if so, how freely does the pump spin?
    • Is there any binding resistance that causes it to stop rotating after a couple of revolutions?
    I’ve preventatively replaced the water pump on our 2010 with 192 k miles at 173 k miles. When I pulled it, there was some resistance compared to the replacement pump going in.

    Good luck and keep us posted (y).
     
    #2 Raytheeagle, Nov 26, 2018
    bisco and Salamander_King like this.
  3. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,781
    48,985
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    welcome!
    is this the engine or inverter coolant?
     
    #3 bisco, Nov 26, 2018
  4. Nikosak

    Nikosak New Member

    Joined:
    Nov 26, 2018
    3
    1
    0
    Location:
    San Antonio Texas
    Vehicle:
    2010 Prius
    Model:
    III
    It is a 2010 with 200K miles. I had replaced the lost coolant but the problem persisted. I removed the pump and it does spin relatively easy. Just want to apply voltage to see if it spins. Also, what voltage should I be getting from the pins in the plug that plugs in it from the car?
     
    #4 Nikosak, Nov 26, 2018
  5. Nikosak

    Nikosak New Member

    Joined:
    Nov 26, 2018
    3
    1
    0
    Location:
    San Antonio Texas
    Vehicle:
    2010 Prius
    Model:
    III
    Engine
     
    #5 Nikosak, Nov 26, 2018
    bisco likes this.
  6. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,781
    48,985
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    i guess i'm surprised at the hybrid system shut down with an overheated engine.
     
    #6 bisco, Nov 26, 2018
(You must log in or sign up to post here.)