2015 Prius V electronic key lost transmission with the vehicle

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by AVN, Jul 29, 2019.

  1. AVN

    AVN New Member

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    Jul 29, 2019
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    Vehicle:
    2015 Prius v wagon
    Model:
    III
    The electronic key stopped working after the car was not used for 5 weeks. The key is not detected. How to determine whether the transmission between the key and the vehicle is being blocked, or the key battery is dead? How to restore the key-vehicle transmission?
     
  2. hchu1

    hchu1 Active Member

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    Vehicle:
    2014 Prius v wagon
    Model:
    Two
    Get a multi-meter and check the voltage on the battery.

    Do you have another functioning key? Try it out for function check.

     
  3. fuzzy1

    fuzzy1 Senior Member

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    (1) Try using the dead-fob-battery method of opening and starting the car. Use mechanical key (in fob on keyring loop) to open the door. To start engine, press brake to wake up the electronics, hold fob to the start button so that the very-short-range RFID detection works, then start car. If this works, then a dead key fob battery is the most likely explanation. (the multi-meter mentioned above is better, but not everyone has it available.)

    (2) Did someone turn off the Smart Key System detection before the trip? Check, and turn it back on if necessary. This is done from the vehicle setup menu on the big screen of my Liftback, but your 'v' would have different menus.
     
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  4. sam spade 2

    sam spade 2 Senior Member

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    Most likely that the 12 V battery has gone dead in the car.
    Have that tested first.

    If you do NOT have a second remote key, GET one soon.
    If you lose both......or both go bad......it is a VERY expensive thing to fix.
     
  5. bisco

    bisco cookie crumbler

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    welcome to PriusChat!
     
  6. msg4life

    msg4life Junior Member

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    You might have to pair it again. I think you have to hold it on the push start button. There is a tutorial I think I'm the manual.
     
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