Help understanding fault codes

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  1. Help understanding fault codes 
    #1
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    Dave Spalding's Car Details
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    Hey folks. Looking for a bit of information on these faults with my E39 M5.

    John from this forum very kindly read the codes for me but just looking for a bit of info on where to start to solve them.

    Below are screen shots of the laptop using IMPA



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    Thanks for looking.

    Dave
     
     

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    #2
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    Front airbag, side right (which should be the one in the driver's door) has a problem, the resistance is too high, but only seen once.

    The ebox fan is a small PC fan that sits in the ECU box to keep them cool, again, only seen once and very recently, so if you've been fiddling with wires, that might be the casue.
     
     

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    #3
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    Dave Spalding's Car Details
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    Ive not touched anything but cleared faults to see what re appeared. Had one to do with passenger occupancy sensor too but thats been done to death on various forums.

    There was also a fueling one which showed up in German on a different laptop.

    will get the details of it again though.

    where is the ebox fan boot? footwell? Should it run all the time with the engine on? Is it worth replacing it?
     
     

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    #4
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    It's in the engine bay, under the pollen filters. I forget which side, but there's should be a plastic box under the filters near the bulkhead where the ECUs are fitted, and inside is a a few electrical bits, a temp sensor, and a fan.

    Error frequency 1 and Logistic counter 40 means it has only been seen once, and it was the last time the car was either switched on, or driven.
    It might be some sort of glitch, so ignore it for now, and if it keeps coming back, you might want to look into it. I can't see it being too vital or critical, I've never heard of anyone having problems from an overheating ECU.
     
     

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    #5
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    thank you. so regarding the air bag. should i just replace it?
     
     

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    #6
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    Yes, although maybe try getting to it first, and reseating the plug incase there is a bad connection.
    If it doesn't reset, get a s/h one, they will plug in without anything else needed, and I'm sure they were fairly cheap too.
     
     

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