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12-21-2012, 07:02 AM | #1 |
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Airbag Light - Z4M
Guys
My airbag light comes on intermittently, I have taken my car to the local BMW fours times now. They have done the following: 1 - Said that the software was upgraded. 2 - Upgraded the firmware. 3 - Replaced the ignition unit. 4 - Replaced the control unit. Two days now after replacing the control unit, the light is back on. What should I do now? |
12-22-2012, 09:43 AM | #6 | |
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You have replaced every component except the most failure prone.. the Passenger Seat Occupancy Sensor Pad.
The seat occupation mat that changes its electrical resistance as the weight load increases is located under the seat cushion. The seat occupancy electronics evaluate these changes. The signal ”seat occupied” or ”seat not occupied” is forwarded by the seat occupation electronics to the airbag control module. As of a weight of around 12 kilograms, the seat is recognized as occupied. The BMW INPA software that your independent mechanic should have, is able to monitor in 'realtime' the status of that sensor pad. If the sensor pad is faulty it will set a code in the SRS control module and any good vehicle (not ODB-II) software that can read the SRS module would have been able to read that code and let you know the specific issue. Quote:
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12-22-2012, 10:01 AM | #7 |
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12-24-2012, 03:51 AM | #9 |
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I drove the car for nearly 200km with no issue thus far. It came on for a few seconds 4 days ago at the time of this post and since then nothing! ..
BMW have asked that I bring the car in if it comes on again. I will look at the passenger sensor as discussed in this forum and if it comes on again .... will let you know. |
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12-24-2012, 07:09 AM | #10 | |
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Are you sure the issue is not something with the instrument cluster? Since you have already replaced the control module and reflashed software, and the problem is still there and it is intermittent, this tells me that it is not error in the SRS system and it might just be an indication issue. . |
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