2002 E46 320d se - airbag light on for 2-3 months now inpa will not clear fault

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Thread: 2002 E46 320d se - airbag light on for 2-3 months now inpa will not clear fault

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  1. 2002 E46 320d se - airbag light on for 2-3 months now inpa will not clear fault 
    #1
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    Bmw320d se's Car Details
    Model of Car:
    320d se
    Year of Manufacture:
    2002
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    I have a 2002 bmw 320d se. The airbag light was on in the instrument cluster when i bought the car. When i first had the error codes read the fault was the passenger seat occupancy sensor. I bought a bypass on fleabay and fitted it and the light went out. airbag light came on again 2-3 months later and has been on ever since. I checked the faults tonight with inpa and it said:

    11 Ignition circuit zk10 / safety battery switch 1

    error frequency:1

    error currently present
    resistance too small
    error not sporadic

    i have searched google and every forum i can find relating to this error and have yet to find a fix :-(

    can anyone help me work out what the fault is and if i can fix it myself or do i need to leave the car in?

    i have attahced a snap shot of the inpa results - i tried clearing the error with inpa but the error comes back within a few seconds.

    thanks in advance!
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    #2
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    bmw325coupe's Car Details
    Model of Car:
    325 coupe
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    found this, could this be the problem?

    It's part of the cable from the battery in the boot. The idea behind it is when the airbags deploy, the car knows you have probably had an accident and disconnects the battery from the car. Could be that when you connected up the seats you left the sense connector off.

    Check under the seats and also check the actual switch box which is a black box connected to the battery by a red wire.
     
     

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    Bmw320d se (12-07-2012)

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    #3
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    What exactly is it that I'm checking for? All I did under the passenger seat was connect the bypass unit. Not sure what I'm looking for at the battery
     
     

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    #4
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    here is a picture of the battery in my car.
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    Got up this morning and stripped my boot down and followed the cable from the positive battery terminal... There was a little yellow switch and the catch had broken and the switch wasn't fully closed.closed the switch and taped it up, cleared the error and the airbag light went out :-))) all thanks to inpa for giving me that idea...seeing as the fault logged was battery switch 1 lol.glad that's finally sorted!
     
     

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    #6
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    And thanks to Bmw325coupe for explaining about the BST !!
     
     

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    It's part of the cable from the battery in the boot. The idea behind it is when the airbags deploy, the car knows you have probably had an accident and disconnects the battery from the car. Could be that when you connected up the seats you left the sense connector off.
     
     

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    glad you got it sorted. sorry i should have explained in more detail, i got called away just after i posted above.
     
     

  12. Same problem 
    #9
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    AuldBM's Car Details
    Model of Car:
    318i ES
    Year of Manufacture:
    2003
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    Manual
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    Hi,

    I have this exact problem on a 318i ES (2003). IPNA threw up the error and I can clear it for a second. I'd hoped the yellow switch mentioned above would be the root cause. I've had a look and all seems well.

    switch1.jpgswitch2.jpgswitch3.jpg

    Can anybody give me an idea where to look now?

    I also have another couple problems that may be related.

    Keyfobs not working or programing (FZV wiring?) & a terrible AM radio reception.

    thanks
     
     

  13. Same error. What could be the problem? 
    #10
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    frankge973's Car Details
    Model of Car:
    Cooper S R53
    Year of Manufacture:
    2003
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    I have a Mini Cooper S R53 year 2003 and I've the same problem of airbag light on.
    I checked with Inpa and reports the same error.
    Where I can look at? My mechanic says that battery was completely covered by water entered from back door, he dried all contact and applied some grease to battery contacts, but the error stays there.
    I tried to clear, but after few minutes comes up again.
    What can I check? under seats yellow and blue cable for seat airbag ?
    My mechanic says that probably it needs to be wiped under the floor completely because it is humid.
    Could be this the problem?
    Thanks
     
     

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