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Sometimes my car door doesn't unlock when I touch it.

Discussion in 'Gen 2 Prius Main Forum' started by macmaster05, Nov 15, 2009.

  1. macmaster05

    macmaster05 Senor Member

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    I've noticed this happen a few times recently, about 1 out of 10 times that I approach my locked car, it doesn't unlock when I touch the driver's door. If I press the button on the handle, it beeps once and still doesnt unlock. I have to take the key FOB out of my pockcet and press the unlock button. What is going on? Is something broken? I don't think my FOB battery is low, I just bought the car 2 months ago. How can I check if my battery is low?
     
  2. SureValla

    SureValla Member

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    same thing happens with my car door. No clue why this happens. I've taken the door off to check it out and can't get to the stuff that might be causing the problem.

    Ive heard suggestions that its the solenoid but i dont have the equipment to check it out.

    I've also heard it could be a wiring issue.

    I called a dealership and since im not under warrenty they want 95$ to just check it out and then more if they need to replace parts.

    For the moment I'm dealing with it. It sucks but I dont think they deserve 95$ for fixing a wiring problem if that ends up being the cause.

    Let me know if you figure out how to fix it.
     
  3. Rokeby

    Rokeby Member

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    I'm having trouble following exactly what is being questioned here. I
    believe that the '09 is the same as the '08. Here's my experience with
    my '08:

    1. When the doors are locked, place your hand in the space between
    the driver's door handle and the door, it isn't necessary to touch either
    the handle or the door. The car beeps twice, the head and tail lights
    blink twice, and the door(s) unlock.

    2. When exiting the car, touch the square black rubber-like pad on the
    drivers door handle. The car beeps once, the head and tail lights blink
    once, and the doors Lock. FWIW, once the door is Locked, you can't
    unlock it for ~3 seconds.

    3. If you grab the handle and push the black pad at the exact same
    moment, you're sending both the Lock and unlock commands.
    The car is justifiably confused, and defaults to the Locked condition.
    Take your hand away from the handle and start again.

    Is your experience different than this?

    (I have no idea what the Lock/unlock sequence is when using the FOB.
    In the nearly two years we've driven Amapola, we haven't used it,
    even once! :eek: )
     
  4. qbee42

    qbee42 My other car is a boat

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    If you press the black button on the handle, you are *locking* the doors, not unlocking them. Make sure your fingers reach around inside the handle when unlocking, and keep away from the black button. If you do both at the same time it confuses the system.

    If nothing else, check the battery in your fob. The fob battery is easy to replace.

    Tom
     
  5. macmaster05

    macmaster05 Senor Member

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    I'm assuming all those conditions are normal, correct? I've tried #1 and #2 of course, but have never tried #3.

    My problem is that #1 intermittently doesnt happen. When I put my hand between the handle and simply try to open it with the FOB in my pocket, nothing happens! It remains locked. It's frustrating and embarassing when I have to press unlock on the FOB.

    P.S. - I do NOT press the black button at the same time I'm pulling the handle back. At least I don't think so, unless the black button is super sensitive and doesn't need to be clicked to be activated.
     
  6. qbee42

    qbee42 My other car is a boat

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    Do you carry anything else in your pocket? Keeping the fob in the same pocket as a cell phone can cause interference.

    Tom
     
  7. macmaster05

    macmaster05 Senor Member

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    Nope. It happened this morning at the gas station and I had nothing in my pocket except my wallet and keys.

    I'm actually on the phone with my dealer ATM. Will tell you what he says.

    EDIT: Ok the service rep had never heard of this problem and suggested I take it in. Problem is, it's only happened a few times and might be hard to reproduce. So for now I'll wait and just keep an eye on it and if it happens any more times this week I'll probably bring it in later. Still would like to know if anybody has any other suggestions. Thanks so far.
     
  8. okiebutnotfrommuskogee

    okiebutnotfrommuskogee Senior Member

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    I have never experienced your problem, in fact, my door handles are so sensitive that all I have to do is brush the back of my fingers over the outside of the handle to unlock the door. No joke.
     
  9. BAllanJ

    BAllanJ Active Member

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    Well, the keys may affect the signal strength....and your wallet may have credit cards with rfid tags that may also interfer.
    I've noticed slightly slower response if the key is in the pocket such that my body is between the key and the door.... understandably weaker response.
     
  10. dogfriend

    dogfriend Human - Animal Hybrid

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    Yep. I notice this with the hatch release - if I am turned so that my body is between the fob and the car (the hatch antenna is beneath the bumper cover), the hatch sometimes won't unlock. Then if I turn so that the fob has a clear shot, it works normally. It might be the fob battery losing strength - my car will be 3 years old in Feb and I use one fob exclusively.
     
  11. macmaster05

    macmaster05 Senor Member

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    Well I kind of doubt that. When I said I have my keys in my pocket I meant only 1 actual key - my house key and Prius FOB. Yep that's all that's on my keychain.

    Also my "keys" are always in my pocket or as you said "on my body", yet the response is usually strong with the ocasionally annoying exception that this thread is about.
     
  12. qbee42

    qbee42 My other car is a boat

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    How about the location? There have been cases where radio signals interfere with the fob, such as near a military base.

    Tom
     
  13. macmaster05

    macmaster05 Senor Member

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    I'm not sure if the location matters since it's random. Nope, not near a military base either. Anyways, Tom, thanks for some possibilities. Like I told my dealer, I'll pay more attention to when and where it happens this week, and let you know what my results are. Mythbusters style.
     
  14. cwerdna

    cwerdna Senior Member

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    Are you touching the black strip on the back of the door handles (only the front doors have it)? Putting your hand between the handle and door aren't necessarily sufficient. Touching the strip should always unlock the doors as long as you have the fob in your pocket and the its battery isn't dead.

    Don't screw with or press the black button when you're trying to unlock the doors. Pressing the black button LOCKS the doors.

    Do you have a cell phone on you? Is it near or in the same pocket as your fob? If so, what if you move it to your other pocket/other part of your body? It's possible your cell phone might be interfering.
     
  15. richard schumacher

    richard schumacher shortbus driver

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    Start simple:
    - Cell phones, coins, anything electronic or conductive in the same pocket or anywhere between the fob and the car handle can interfere.
    - Check the fob battery. Press any button on the fob (you do not have to be near the car). A small red LED should flash in one corner. If not the $4 fob battery is dying.
     
  16. macmaster05

    macmaster05 Senor Member

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    Of course I'm touching the black part on the back of the handle. How else would I open the door, telepathically?? Again I carry almost nothing in my pocket.
     
  17. qbee42

    qbee42 My other car is a boat

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    No reason to get snippy. The handle sensor is a capacitive switch. You don't have to physically touch it for activation, which is why it will work through gloves. Making contact improves the signal, which is why the poster asked this question.

    Please try to remember that you are the one with a problem, and you asked for help. It is surprising how often the solution to a problem turns out to be an obvious step that was missed up front, so please be patient when people ask obvious questions.

    Tom
     
  18. zenMachine

    zenMachine Just another Onionhead

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    I recently discovered that if you lock the car by pressing the lock button on the FOB, you have to use the FOB to unlock, i.e. touching the handle doesn't unlock in that case.
     
  19. Sp33dy_gr33n

    Sp33dy_gr33n New Member

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    try your other hand - I have noticed that my wedding ring may be causing the problem.
     
  20. Frayadjacent

    Frayadjacent Resident Conservative

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    I'd replace the battery in the fob and see if it keeps happening.