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How do you enter the 2012 Prius C diagnostic mode?

Discussion in 'Prius c Main Forum' started by Phil 29 Palms CA, Aug 16, 2014.

  1. Phil 29 Palms CA

    Phil 29 Palms CA Member

    Joined:
    Oct 19, 2012
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    Location:
    Twentynine Palms, CA.
    Vehicle:
    2012 Prius c
    Model:
    Two
    I learned it is possible to monitor the condition of the 12 volt battery by evaluating its voltage under electrical load when in the battery diagnostic mode. My research on this subject said. - To enter the diagnostic mode put the ignition system in the READY mode, Press and hold the SETUP BUTTON while turning the headlight switch on and off 3 times. My question is - Where is the SETUP BUTTON.? Is the answer to use the DISPLAY BUTTON to select the setup screen display on the monitor. When the setup option screen is shown then press and hold the DISPLAY BUTTON while turning the headlight switch on and off 3 times? Has any reader of this thread entered the 2012 Prius C diagnostic mode. Please reply and describe the switch to hold while turning the headlight switch on and off 3 times! Where is this switch located.

    THANKS...
     
    #1 Phil 29 Palms CA, Aug 16, 2014
  2. ROLOPR

    ROLOPR Member

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    Location:
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    Vehicle:
    2012 Prius c
    Model:
    Two
    As i understand that is for touch screen radios only.
     
    #2 ROLOPR, Aug 16, 2014
  3. priusengr

    priusengr New Member

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    Denver, Colorado
    Vehicle:
    2014 Prius c
    Model:
    N/A
    I am new in this forum. I do not know how to create a new post or I do not have permission to start one. Sorry to revive this thread beforehand. I have a 2014 Prius C. I am getting "shift to p position when parked ". I was reading somewhere that it has to do with 12v battery getting old. I thought I would check the diagnostics about the voltage. But how do I get the diagnostics? My prius C does not have 'CAR' button nor POWER button. Please help..
     
    #3 priusengr, Jan 12, 2021
  4. sam spade 2

    sam spade 2 Senior Member

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    Vehicle:
    2017 Prius c
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    Four
    That method has proved to be somewhat confusing and unreliable.
    A $10 multi-meter is a better tool for the task.

    OR if the battery still is the original and 6-7 years old, just replace it.
     
    #4 sam spade 2, Jan 13, 2021
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