306 Ultrasonic alarm sensors: How to fix ?

Discussion in 'Peugeot 306' started by tom saffell, Nov 13, 2004.

  1. tom saffell

    tom saffell Guest

    I have a '97 (new model) 306 GLX.

    The alarm has been randomly going off recently (sometimes within 5
    minutes of arming, sometimes hours). I have followed the instructions
    for de-arming the US sensors (found on this group - thanks) and when I
    do that, the alarm never goes off, so I'm fairly sure its the US
    sensors. I've searched this newsgroup, but I can't find answers to the
    questions below - sorry if I missed them.

    Problem is, I'd like to have them armed the whole time, so:

    Anyone know how to fix them ?

    Can anyone give an account of how they work ?

    Is it possible to trim their sensitivity ?

    Can they be triggered by slow continuous changes in air pressure, for
    example, when the car is in direct sun light, or a very cold evening ?

    Does it make any difference if their is lots of stuff in the car ?

    FYI - the problem first happened on a cooling summer's evening with
    bikes inside the car, and parked next to a Fiat with known alarm
    problems.

    thanks

    tom saffell
     
    tom saffell, Nov 13, 2004
    #1
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