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Alarm randomly going off at 3am

Discussion in 'Gen 4 Prius Care, Maintenance and Troubleshooting' started by raspy, Sep 23, 2017.

  1. raspy

    raspy Senior Member

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    I was woken up to the sound of what seemed to be my pride and joy being stolen. I ran outside and there was nobody around yet the alarm was blaring out at 3am.

    This is the first time this has ever happened in 1 year since new. The windows were all closed. Has anyone else had this with their Gen 4?
     
    #1 raspy, Sep 23, 2017
  2. Mendel Leisk

    Mendel Leisk Senior Member

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    Someone (or thing, say a cat?) took off as soon as the alarm sounded?
     
    #2 Mendel Leisk, Sep 23, 2017
  3. raspy

    raspy Senior Member

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    Maybe. I was quite sleepy so didn't see if there was anyone running down the road.
     
    #3 raspy, Sep 23, 2017
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  4. bisco

    bisco cookie crumbler

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    is the alarm system any different than past generations?
     
    #4 bisco, Sep 23, 2017
  5. alanclarkeau

    alanclarkeau Senior Member

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    I didn't realise it had an alarm. Another thing I learned today.
     
    #5 alanclarkeau, Sep 24, 2017
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  6. RCO

    RCO Senior Member

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    Not required beyond the black stump! :ROFLMAO:

    N.B. The Australian expression 'black stump' is the name for an imaginary point beyond which the country is considered remote or uncivilised, an abstract marker of the limits of established settlement.
     
    #6 RCO, Sep 24, 2017
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  7. raspy

    raspy Senior Member

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    So I figured out the cause when I unlocked the car in daylight. I have a label on the steering wheel attached with sticky tape, and it appears that at 3am that had fallen off the steering wheel and landed on the driver's seat. Once the car is locked, the alarm is armed and the ultrasonic sensors (those two holes just near the dome light in the ceiling) would have detected the label falling off, and hence triggered the alarm. So now I know my alarm works (as do my neighbours).

    Reading through the manual, it cautions on 'hanging' anything in the car such as a wind chime which might trigger the sensors through movement.
     

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    #7 raspy, Sep 24, 2017
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  8. alanclarkeau

    alanclarkeau Senior Member

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    I think I've worked out that mine hasn't got an alarm - my Manual (nor the USA Manual) doesn't talk about it either, whereas the UK/Euro Manual has lots of mentions of an alarm.

    ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

    BLACK Stump - when I drove a VOLVO - 12 years ago:

    upload_2017-9-25_13-39-52.png

    upload_2017-9-25_13-41-22.png
    upload_2017-9-25_13-41-57.png

    upload_2017-9-25_13-42-48.png
     
    #8 alanclarkeau, Sep 24, 2017
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  9. kithmo

    kithmo Couch Potato

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    We also have double locking, which prevents unlocking/opening the door from inside, so if a thief breaks a window they have to climb in through it to get inside the car.
     
    #9 kithmo, Sep 25, 2017
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  10. RCO

    RCO Senior Member

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    Isn't that how everybody gets in and out of cars in cars in California, or have I been watching too much TV?
     
    #10 RCO, Sep 25, 2017
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  11. KV55

    KV55 Member

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    My Gen 4 alarm went off some months back after a long journey, hasn't done it since and I assumed that something moved within the car but nothing was obvious eg the tonneau cover was still in place. I still get regular cat paw prints from front to rear (why they can't just walk around I don't know) so I don't think a cat can set it off - unless locked inside.
     
    #11 KV55, Sep 25, 2017
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  12. RCO

    RCO Senior Member

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    Ah yes, the local cat burglar! Usually leaves offensive packages in my front and back yards.
     
    #12 RCO, Sep 25, 2017
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