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

TPMS Wake-up from the Reset Button

Discussion in 'Gen 3 Prius Technical Discussion' started by Jonny Zero, Dec 5, 2014.

  1. Jonny Zero

    Jonny Zero Giggidy

    Joined:
    Jun 22, 2012
    1,388
    351
    0
    Location:
    Austin, TX
    Vehicle:
    2012 Prius
    Model:
    Five
    On a typical, non-Toyota car, the TPMS sensors do not report pressures, until the wheels are spinning for a few minutes.

    I am wondering how does the RESET function work on the Prius. Does the TPMS ECU send a wireless signal to wake up the sensors? Or do they read and record the golden pressures the next time the car is driven?
     
    #1 Jonny Zero, Dec 5, 2014
  2. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,673
    38,210
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    I'm thinking it must be reading pressures at the time you do the reset procedure, it's just the only thing that makes sense to me, reading through the instruction.
     
    #2 Mendel Leisk, Dec 5, 2014
  3. Jonny Zero

    Jonny Zero Giggidy

    Joined:
    Jun 22, 2012
    1,388
    351
    0
    Location:
    Austin, TX
    Vehicle:
    2012 Prius
    Model:
    Five
    So you think there are means for the TPMS ECU to wirelessly "WAKE" the sensors without having to spin them?

    BTW I am still jaded that every other car offers the ability to read the PSI values off the tires, but not the Prius.:mad:
     
    #3 Jonny Zero, Dec 5, 2014
  4. David Beale

    David Beale Senior Member

    Joined:
    Jul 24, 2006
    5,963
    1,981
    0
    Location:
    Edmonton Alberta
    Vehicle:
    2012 Prius
    The Prius reads the PSI values, it just doesn't tell YOU what they are. Only if they more than 20% below the "set value".
     
    #4 David Beale, Dec 7, 2014
  5. Easy Rider 2

    Easy Rider 2 Senior Member

    Joined:
    Aug 5, 2014
    1,584
    257
    0
    Location:
    Ocala, FL
    Vehicle:
    2013 Prius c
    Model:
    Three
    Well that is just simply wrong.
    I recently had a Hyundai that didn't report individual wheels and neither does my "high end" Ford Fusion.

    Of course they all "read" them, they just don't report them to the driver.
     
    #5 Easy Rider 2, Dec 7, 2014
(You must log in or sign up to post here.)