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Smart Key Issues

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by pastorkenny, Oct 27, 2018.

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  1. pastorkenny

    pastorkenny New Member

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    2007 Prius
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    II
    Help! Here's what I got...
    • 2007 Prius with smart key system (silver logo on the fob)
    • Just changed the battery on my key fob
    • The fob locks and unlocks the doors when I press the fob buttons
    • The fob in my pocket doesn't allow me to open doors using smart key sensors
    • The fob in my pocket doesn't allow me to start the car. I have to insert the fob.
    Here's what I already tried...
    • the "key" button under the steering wheel
    Here's what I'm NOT gonna do...
    • Go to the dealer

     
    #1 pastorkenny, Oct 27, 2018
  2. bisco

    bisco cookie crumbler

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    test the health of your 12v battery

    when it starts to get low, the range decreases as you describe

    my '04 did the same exact thing. fob buttons worked, but not sks
     
    #2 bisco, Oct 27, 2018
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  3. JC91006

    JC91006 Senior Member

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    Is this car new to you? Did sks ever work? Is the button under the dash labeled SKS?
     
    #3 JC91006, Oct 27, 2018
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  4. pastorkenny

    pastorkenny New Member

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    Its not new. The SKS has worked for over two years now and only stopped when I replaced the fob battery.
     

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    #4 pastorkenny, Oct 27, 2018
  5. pastorkenny

    pastorkenny New Member

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    So the battery test says I'm getting 13.9v out of my 12v battery. Seems weird eh?

     

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    #5 pastorkenny, Oct 27, 2018
    Last edited by a moderator: Oct 28, 2018
  6. exstudent

    exstudent Senior Member

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    13.9V is likely with the car READY? READY is the equivalent of the engine running, recharging the 12V battery. If this is what you did, you are measuring the Voltage as the 12V battery is getting recharged.

    Read post #5 & #8. Is my inverter coolant pump slowly failing? | PriusChat
    Post 5-quick easy way to load test the 12V battery
    Post 8-SOC (State of Charge) chart, some smart, AGM compatible 12V battery chargers.​
     
    #6 exstudent, Oct 28, 2018
  7. exstudent

    exstudent Senior Member

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    Is the FOB battery the correct one? Test the FOB battery to rule it out.
     
    #7 exstudent, Oct 28, 2018
  8. bisco

    bisco cookie crumbler

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    if you are saying you replaced the fob, that may be the issue.
     
    #8 bisco, Oct 28, 2018
  9. edthefox5

    edthefox5 Senior Member

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    Seen a few posts about people taking there fob apart and the tiny little rfid module falls out. It’s a tiny little black piece Attached to the inside of the fob body. If rfid is not in the remote it will act like your scenario.
     
    #9 edthefox5, Oct 28, 2018
  10. JC91006

    JC91006 Senior Member

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    His works in the slot, missing sks functions. RFID chip will affect our working in the slot only

    It sounds like his sensors in the door and center console are not working.
     
    #10 JC91006, Oct 28, 2018
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