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Prius alarm system

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Fxeharley, Mar 23, 2015.

  1. Fxeharley

    Fxeharley New Member

    Joined:
    Mar 23, 2015
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    Location:
    Arizona
    Vehicle:
    2007 Prius
    Model:
    II
    I have a 2007 Prius and everytime you go to start it the horn blows twice. It never did it when we first bought it. I called the dealer and they said it had something to do with the alarm settings. Does anyone know how to fix it?
     
    #1 Fxeharley, Mar 23, 2015
  2. nh7o

    nh7o Off grid since 1980

    Joined:
    Dec 10, 2011
    1,686
    338
    0
    Location:
    Hawaii
    Vehicle:
    2009 Prius
    Model:
    II
    How old is the 12V battery? Please check to make sure it is functional:
    Weird stuff happening? MPGs dropping? Test The Battery | PriusChat

    From the manual, it shows that the alarm system can go into "alarm sounding state" upon reconnection of the 12V battery. If the battery is bad, it might cause a transient glitch at startup which could do that also.
     
    #2 nh7o, Mar 23, 2015
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