2002 e46 320i -saloon help on alarm fault

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  1. 2002 e46 320i -saloon help on alarm fault 
    #1
    BMW Master
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    d9n_dk's Car Details
    Model of Car:
    535
    Year of Manufacture:
    2002
    Transmission Type:
    automatic
    Car Body Type:
    saloon
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    hi guys i know there have been a couple of theads on this but i thought id start my own as didnt want people thinking i was snatching other peoples threads

    as some of you may know my alarm on my 2002 e46 saloon has a mind of its own and can go off at the slightest movement ive tried the double clicking on the key fob to turn sensors off inside but just lately its been getting worse so much so my next door neighbours have been knocking at my door at silly 'o' clock asking me to turn it off

    ive not taken it to any garage yet as i like to try and sort things out myself so this is what ive discovered so far what do you guys think

    just lately when ive been locking the car the indicators have stopped flashing which am i right in saying this means there is an open circuit in the alarm locking system i.e door is still open? ive tried opening and closing all doors and boot lid still no good
    then it dawned on me the bonnet will have a sensor too so i opened the bonnet and clossed it again funny enough the indicators now flash and doors lock an hour passes and the alarm is going off again ive disconnected the bonnet sensor and all seems ok at the mo indicators still flash doors all locked

    does anybody know of a common fault with these bonnet sensors and do i have to replace it or can i just leave it disconnected i know with leaving it disconnected the bonnet isnt covered on the alarm any comments would be great and of much help

    thanks in advance dan
     
     

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    #2
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    d9n_dk's Car Details
    Model of Car:
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    anyone know?
     
     

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    #3
    BMW Crazed
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    colin.ab's Car Details
    Model of Car:
    530d
    Year of Manufacture:
    2002
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    Auto
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    Errmm, yes I have heard of a fault where the bonnet switch does not properly make. The best way to fix the fault is to add something to the plunger such that it is pressed in further when the bonnet closes. Yours is probably very boarderline, with a knats burp setting off the alarm
     
     

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    #4
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    d9n_dk's Car Details
    Model of Car:
    535
    Year of Manufacture:
    2002
    Transmission Type:
    automatic
    Car Body Type:
    saloon
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    yeh it is very much like that thanks for the reply
    ive had it disconnected now since sunday and the alarm hasnt gone off as far as i know do you think it would be ok to leave it unplugged,with out smashing a window and pulling the bonnet catch so it opens (which will set the alarm off anyway) its gonna be quite hard to get under the bonnet (im guessing)
     
     

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