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

Honking twice quickly upon startup

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by outomyelement, Oct 30, 2010.

  1. outomyelement

    outomyelement New Member

    Joined:
    Sep 12, 2009
    4
    0
    0
    Location:
    ca
    Vehicle:
    2005 Prius
    Model:
    V
    It doesn't happen every time we start the car, but sometimes, we start the car (foot on the break, e-brake on -- I think) and it honks twice quickly.

    We can't figure out what's going on because we can't replicate it!

    Anyone had a similar issue?
     
    #1 outomyelement, Oct 30, 2010
  2. Rokeby

    Rokeby Member

    Joined:
    Jan 21, 2008
    3,033
    708
    75
    Location:
    Ballamer, Merlin
    Vehicle:
    2008 Prius
    Your car may have a case of the infamous "Barking Brakes."
    Here's a thread to read all about it: http://priuschat.com/forums/gen-ii-...19051-my-brakes-barking-me-2.html#post233606]

    If the sound can be reproduced reliably to your dealer/service tech,
    there is a TSB on it. (Technical Service Bulletin) See post #53.
    No cheating now! Reading the whole thread is very
    interesting/informative.

    If it persists, or you complain loudly/longly enough, there is even
    a chance that it might be fixed for free. :cheer2:

    Hope this helps.
     
    #2 Rokeby, Oct 30, 2010
  3. andyprius

    andyprius Senior Member

    Joined:
    Feb 21, 2005
    2,212
    188
    0
    Location:
    Sacramento, California.
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    There was a case just two years ago about a owner complaining of horn going off and of windshield wipers working for no reason, at the very least, complain often and save the documentation, it could be a precursor of a more serious computer problem.
     
    #3 andyprius, Nov 1, 2010
  4. outomyelement

    outomyelement New Member

    Joined:
    Sep 12, 2009
    4
    0
    0
    Location:
    ca
    Vehicle:
    2005 Prius
    Model:
    V
    Awesome. Thanks for the response, sorry for my delay in responding. This work stuff is killing me!!

    Yes, we're still experiencing the issue, although no issue with the windshield wipers. When we take the car in for that new recall for our year, i'll talk to them about it. I don't think it's the brake issue.

    Thanks for the info!
    Kevin
     
    #4 outomyelement, Dec 17, 2010
  5. SolarDude

    SolarDude Junior Member

    Joined:
    Nov 17, 2011
    3
    0
    0
    Location:
    Colorado
    Vehicle:
    2005 Prius
    Model:
    N/A
    Have you learned anything about honking on startup? My car does that as well. Not always, but just sometimes.
     
    #5 SolarDude, Nov 17, 2011
  6. cwerdna

    cwerdna Senior Member

    Joined:
    Sep 4, 2005
    12,544
    2,123
    1
    Location:
    SF Bay Area, CA
    Vehicle:
    2006 Prius
    Is it an actual honk or the brakes barking as described above?

    If it's the brake bark, there is a TSB but since you're out of warranty, I highly doubt it's worth it to pay to get it fixed. IIRC, some folks have solved the problem getting the brakes bled, but that (IIRC) requires Toyota Techstream or equivalent.

    I have the brake bark and I don't care, due to the above.
     
    #6 cwerdna, Nov 17, 2011
  7. seilerts

    seilerts Battery Curmudgeon

    Joined:
    Mar 7, 2010
    3,326
    1,512
    38
    Location:
    Santa Fe, NM
    Vehicle:
    2005 Prius
    Check your 12V. Yours being a 2005 SolarDude, if it is original, you are way overdue. On startup, the 12V initially sags under the weight of the boot procedure, and the body computer can do weird things in a low voltage state, like running the wipers or honking hte horn.
     
    #7 seilerts, Nov 17, 2011
    3 people like this.
  8. richard schumacher

    richard schumacher shortbus driver

    Joined:
    Mar 27, 2004
    7,663
    1,038
    0
    Location:
    United States
    Vehicle:
    2004 Prius
    Model:
    N/A
    #8 richard schumacher, Nov 19, 2011
(You must log in or sign up to post here.)