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Keyless start problem

Discussion in 'Gen 2 Prius Technical Discussion' started by casta, Nov 1, 2008.

  1. casta

    casta New Member

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    Where is the receiver for keyless start? When I try to start with fob in pocket, I get the key error light on the dash. If I put the fob in the slot, I could start the car.

    I took apart the console today and was wondering if this is the reason why the keyless system would not allow the car to start with the fob in my pocket.

    Thanks for the help.
     
  2. justlurkin

    justlurkin Señor Member

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    Sounds to me like the battery inside your key fob needs to be replaced.

    When the keyfob's battery dies, I think one of the symptoms is the car can't detect it unless you insert it into the slot.
     
  3. rigormortis

    rigormortis Active Member

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    or u have the switch turned off
     
  4. richard schumacher

    richard schumacher shortbus driver

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    Or you have other stuff in the pocket that interferes with the signal: a cellphone, or a big mass of coins or metal keys.
     
  5. krmcg

    krmcg Lowered Blizzard Pearl Beauty

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    When mjy iphone is in the same pocket as my fob, many times the car does not recognize it.
     
  6. pewd

    pewd Clarinet Dude

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    he did say he took apart the console....
     
  7. lenjack

    lenjack Active Member

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    Did you have any parts left over when you put it back together?
     
  8. rigormortis

    rigormortis Active Member

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    diagnosing smart keys

    does the wireless lock and unlock buttons on the actual key lock and unlock doors?
    yes - key is fine go to next step
    no - stop , replace key battery, replace key



    does the key in smart mode open the three doors?
    lock car
    open hatchback with hand on door handle
    lock car
    open passenger door with hand on door handle
    lock car
    open drivers door with hand on door handle
    lock car

    yes it worked - your key is fine go to next step
    no - try a different key, verify the 'key button is not disabled
    go to your dealer, replace the battery in the key

    can you turn the car on, sitting in the drivers seat?
    yes - key is fine
    no - if the key will lock and unlock doors but the engine will not start, then you
    probably will need to go to the dealer to have the antenna checked. i believe this is located in the console box, heh

    **** advanced step ****

    If you are nervous about locking your keys in the car, then it is ok to roll a window down

    this step requires the use of two smart keys. ( or one smart key and the mechanical key)
    do not use the mechanical key to lock the doors, just to fetch your key
    another way to check key detector is to lock the car with a key in it.
    using the mechanical key is not valid for this test.
    using the remote control key lock/unlock is not valid for this test
    leave the key in the 5 detection zones and try to lock the car with the power door lock
    on the inside of the door handle and slam the door.

    drivers seat
    passenger seat
    left rear passenger seat
    right rear passenger seat
    hatch back door

    this may or may not lock your keys in your car!!!! but it is a good step in diagnosing
    problems if the antennas are good then the car should automatically unlock itself when you try and lock the car with the keys in it if any of the antennas are bad then you will lock your keys in the car



    *** advanced smart door test ***
    place key in hatch back area
    close all doors
    lock with mechanical key
    walk away
    come back with no keys and put hand on door handle
    all doors should unlock
    YES - key is fine, rear door sensor is fine
    NO - smart door turned off by the dealer, bad key, bad key battery, bad sensor





    the repair manual states that the #1 first step in diagnosing the smart key, is to simply check
    the voltage on the 12v battery. if it reads 11 to 14 volts, then continue checking other things

    the # 2 step would be to check for dtc codes with a engine scanner / scan guage

    if those two steps are fine, there are no codes, and the battery reads > 11 volts
    and the key is not turned off, or the battery is fine in teh key, then take it to the dealer

    keep quiet and pray that he does not charge you for busting it when you took apart the
    console box