Z4 2004 Airbag Module Wanted!!
- Thread starter Zoomer04
- Start date
Attleborough, Norfolk
I have spoken to them. They can erase crash data from the centre modules. They were a little hazy about whether they could do the satellite ones, but I would assume it must be similar.Mike6 said:
The issue the pre-facelift cars are having is that these modules are failing due to other reasons:
Left and right satellites seem to succumb to damp.
Centre one (SIM85), occasionally due to damp but also spikes from jump starts. I have seen a few where the step-up converter inside has failed.
Sometimes they just stop talking to each other for no apparent reason. It is difficult to diagnose when they no longer interact with the scanning tools.
I currently have one of each sat with the software boffins at Lotus (my wife used to work there). I suspect replacing a step up converter will be well within their reach, but no idea how they start to fix the satellite modules that refuse to talk to anyone. However, we have to try at least.
Well done enuff. A facinating but frustrating problem. Have you taken one of the satellite modules apart. Be interesting to see what is inside, if you could post a pic.
Presumably BMW didnt manufacture them but purchased from a supplier. Is there any markings on the units, might be able to track them down etc.
Presumably BMW didnt manufacture them but purchased from a supplier. Is there any markings on the units, might be able to track them down etc.
They do some different things. The plugs are identical but the wires into them are all different. The modules communicate with each other using the fibre-optic connections.paul__mck said:
Also, only found out recently that the three modules send each other check messages at defined intervals. If one of them doesn't hear from another one in the correct time scale then it registers a 'time-out' fault and puts the airbag light on.
So you scan it and find that, for example, the right module has registered a fault to say that it hasn't heard from the left module. So the fault code is for the right module but in fact it is the left module that has the issue.
I should point out that my entire engineering career has been engines and airframes. I am doing my best to understand all this ethereal software malarkey, but this old dog is struggling with the new tricks.
If I can pick up a pre-facelift as a breaker I may spend a bit of time trying rights in lefts etc. What could possibly go wrong? :roll: