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

battery FAN problem

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by tomy, Jun 16, 2019.

  1. tomy

    tomy Junior Member

    Joined:
    Jan 7, 2016
    20
    1
    0
    Location:
    europe
    Vehicle:
    2006 Prius
    Model:
    N/A
    hellow, my battery fan work just when connected OBD with hybrid assistant app, if not connected fan is sleep. outside temperature 30C, what is problem can you help?
    and car battery internal resistance is 0.023-0.027ohm its normal?
     
    #1 tomy, Jun 16, 2019
  2. jerrymildred

    jerrymildred Senior Member

    Joined:
    Oct 28, 2016
    11,518
    14,128
    0
    Location:
    Tampa, FL
    Vehicle:
    2017 Prius
    Model:
    Two
    Sounds normal to me. The fan is controlled by an ecu that is monitoring the battery temperature. How hot is the battery?
     
    #2 jerrymildred, Jun 16, 2019
    Dxta likes this.
  3. Dxta

    Dxta Senior Member

    Joined:
    Nov 7, 2016
    1,932
    767
    0
    Location:
    Lagos
    Vehicle:
    2008 Prius
    Model:
    II
    As long as you don't see the red triangle light, when you removed the obd2 with the fan "sleeping", the car's ECU would take care of the rest.
    But from the resistance vues, appears the battery is getting hot already.
     
    #3 Dxta, Jun 16, 2019
  4. tomy

    tomy Junior Member

    Joined:
    Jan 7, 2016
    20
    1
    0
    Location:
    europe
    Vehicle:
    2006 Prius
    Model:
    N/A
    Battery temp. Is a 35-41 C
     
    #4 tomy, Jun 16, 2019
  5. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
    56,686
    39,234
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    On my third gen, pretty sure the fan was coming on, maybe speed one or two, around 35C battery temp. It's been a few years since I monitored, so not sure.

    There's some blower motor troubleshooting info in the attached. I've only skimmed, but hopefully will help.
     

    Attached Files:

    #5 Mendel Leisk, Jun 16, 2019
  6. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    110,156
    50,059
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    how are you determining if the fan is coming on or not? don't go by sound
     
    #6 bisco, Jun 16, 2019
(You must log in or sign up to post here.)