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Old 05-12-2019, 07:00 PM
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Location: Vancouver, WA
Car: 750i
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Default SRS box swap out question, '02 E39

Do I need to do some sort of SN write when changing out my SRS control
box? I need to swap mine out as a test and recall, vaguely, seeing something
about having to write the SN to the IKE? so that it will see the box? If so, what
is this process called?

I've traced my occupancy seat signal implausible fault code to the box, meaning
that the signal goes from the seat to the SRS box, but I still get the error. It's
the only error in the SRS module. I've taken the box apart to look at the input
terminal, but found nothing obvious. By tracing the signal, I mean that I've
connected my oscilloscope to the white/red wire just at the box and get a good
signal. It appears that the box is not seeing the signal internally. I've tested my
signal with another known-good car and see the same signal on both cars.

I would like to swap out the box with another as a test, hopefully gaining some
more insight.

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Old Today, 03:04 AM
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I've done some more research about coding a new VIN and mileage to the new
SRS box using BMW Scanner 1.4 It doesn't look too difficult.
Can anyone verify, or have experience with, reprograming a swapped-out SRS box?

Thank you
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