Re: Z4 Sat Nav Screen

Jeff Strickland wrote:

Let's say there is a spec for a clearance somewhere. The mechanics are within the spec, but +/- spec of the slide parts is causing a tighter than expected fit resulting in the drive from the software is insufficient. They can fiddle with the software to affect the neccessary change. I suspect the software (firmware, actually) engineers simply did not write the code for the strength of the motor. They under-engineered the pulse width they needed to get the job done. The problem probably comes from the maker of the system that BMW bought and installed in your car, it is not symptomatic of BMW at all.

Wow. Thanks for the detailed info. I can only agree with you completely as everything you have described here would fit in with how my motor is working and makes perfect sense. Also there is a button on the left of the screen which if you tap it moves the screen up or down in single step increments which further supports your pulse motor description. This also works intermittently.

After all of that, have you had the software upgrade AND still have the problem? Your symptom set seems to match the problem identified in the service bulletin.


Yes. After I read the service bulletin I was quite excited that I may have solved the problem - but it doesn't make it any better. Over time it is definitely getting worse which leads me to believe that somehow the current is getting weaker although occasionally it works fine.

Faulty connection to the motor perhaps?

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Sam
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