Airbag SRS codes 2002 E46 325ti sport

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  1. 2002 E46 325ti sport Airbag SRS codes - can i fix myself ? 
    #1
    BMW Master
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    mrwhite's Car Details
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    Hi

    Ive had the airbag light on since purchase a few weeks ago and purchased a autel code reader and a separate bmw srs reader

    Ive done the scan with the srs have gotten the following codes


    Table 10

    2 Firing Circuit, Belt Tensioner, driver side
    3 Firing Circuit, Belt Tensioner, passenger side
    70 Seat Occupancy sensor
    50 Supply voltage

    Are the issues something i can resolve simply myself and is the occupancy the passenger (common fault) or driver (there is in the guide 71 which is seat occupancy seat sensor II but that didnt show on my scan) ?!

    ps if any one local wants the use of the tools im happy to let them free, if they come to me.
    Last edited by mrwhite; 05-09-2011 at 19:59.
     
     

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    #2
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    joylove's Car Details
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    First clear the codes and see which ones return.

    Second BMW sell a repair cable for the tensioners. You will need to cut and solder the new wires in, keeping them the same length.

    Check your seat multiplug and the delicate little plug on the SRS tensioner. It is usually these that are the faulty parts.
     
     

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    mrwhite (06-09-2011)

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    #3
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    I cleared them and they all came back again, sorry forgot to mention that.

    Ive read elsewhere, that the tensioner could be a false reading and that cleaning it with rubbing alcohol may work ? any one else heard that or similar
     
     

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    No mate, it's a red herring. The fault is shit connections, made worse by the seat moving.
     
     

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    mrwhite (06-09-2011)

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    #5
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    update:

    fitted occupancy sensor bypass module from ebay to the passenger seat and rescan with srs tool

    all have now cleared except oddly

    3 Firing Circuit, Belt Tensioner, passenger side

    have noticed the seatbelt not plugged in light is coming on a start up now which it didnt used to at all, then goes out after a few mins.


    might have a wiggle with the cables under the passenger seat and if no joy, will look at getting the repair loom.
     
     

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    #6
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    mrwhite's Car Details
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    wiggled the cables about under the seats and eventually got the fault cleared after about 20 mins

    has been airbag light free since, and no need to change any wiring looms
     
     

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