02 745i Radio & navigation problems

*Car Problems* One night I went to start my car and the front nav screen flickered a bit. As it turned on it looked as if there was no problems. I go to accept the agreement and realize that after doing so both CD options (CD Changer/Single CD) are grayed out as well as the Radio. I scroll down to click, nothing, no sound of any sort (execpt a little crackle out of the front speakers, that happened every now and then previously). I scroll to the navigation, again nothing, just a blank screen where the nav would normally appear. Come to find out most all of the control functions dont work, with exception of the climate control. You can navigate through the menu just fine but when it comes to working nothing happens.

I as well have a 2002 BMW 745i and am having the same issue. I took the MODE BUS out for a few min and plugged back in to see if it might reset the radio or navigation, nothing. I also went to BMW and asked if I should replace the MODE BUS. One of the techs I spoke with said he didn't recommend that because he didn't think that would be the cause. So I was wondering if there might be something else I can try?

I've tried reseting the MOST BUS by pulling it out and plugging back in. I've tried cutting power to the entire and let it drain a bit (unplugged the battery). Not really to sure what to do from here. Any suggestions? Thank you!!

same exact problem im having!!

My speakers were making a cracking sound then one day my nav system screen went blank. It came back on but wouldn't let me select anything. My cd changer/cd player and radio fade in and out with the same cracking noise coming through the speakers. Any ideas??

I'm having the same problem. Did anybody find out anything?

Adam745 - I have got this problem fixed by performing some wierd steps and you can give it a try:

- remove the radio/cd fuse (usually fuse no. 76) while the car engine is turned off
- eject the CD changer box (where the CDs are inserted) from dashboard
- plug-in the fuse again
- start the car and play a CD from main CD player (it should not make that noise and should not trip to radio)
- once you check the noise is not coming after playing the CD for 5 mins or so, insert the CD changer box with CDs
- run any CD from changer now and it should work fine

I know thats wierd but it worked for me, all the best !!
Let me know if it works ?

-Sohail

did you ever get it fixed?? i have the same problem...

I am having this problem
*Car Problems* One night I went to start my car and the front nav screen flickered a bit. As it turned on it looked as if there was no problems. I go to accept the agreement and realize that after doing so both CD options (CD Changer/Single CD) are grayed out as well as the Radio. I scroll down to click, nothing, no sound of any sort (execpt a little crackle out of the front speakers, that happened every now and then previously). I scroll to the navigation, again nothing, just a blank screen where the nav would normally appear. Come to find out most all of the control functions dont work, with exception of the climate control. You can navigate through the menu just fine but when it comes to working nothing happens.

I as well have a 2002 BMW 745i and am having the same issue. I took the MODE BUS out for a few min and plugged back in to see if it might reset the radio or navigation, nothing. I also went to BMW and asked if I should replace the MODE BUS. One of the techs I spoke with said he didn't recommend that because he didn't think that would be the cause. So I was wondering if there might be something else I can try?

I've tried reseting the MOST BUS by pulling it out and plugging back in. I've tried cutting power to the entire and let it drain a bit (unplugged the battery). Not really to sure what to do from here. Any suggestions? Thank you!!

Ijust had this. I bypassed voice module and everything worked. Bought. A used one on ebay. Installed it ansnow everything. Works like new again

Sent from my MB860 using Bimmer App

thank you so m.uch for your input!! whats the easiest way to bypass voice module. this is new for me

The fiber optic need to be joined to one another. The connector going into the voice module needs to be taken apart and the input and output fiber should point to one another. If you do this with the key on and everything comes back to life then you have discovered the failed module

Sent from my MB860 using Bimmer App

Originally Posted by bghubr

The fiber optic need to be joined to one another. The connector going into the voice module needs to be taken apart and the input and output fiber should point to one another. If you do this with the key on and everything comes back to life then you have discovered the failed module

Sent from my MB860 using Bimmer App

The voice module may have been problematic on your car but may not be the problematic module on his. See the link below..scroll to page 11 and you will see a diagram on the MOST network and all the modules you may need to bypass. You will need to bypass one module at a time until the system starts to function to find your bad module.

http://www.bmwmotorsports.org/BMW_docs/mostbus.pdf

I've had the voice module on my car fail 4 times.

Seems problematic.

A simple bypass solution is to use a piece of rubber tubing that fits tightly and insert
the input and output into a short piece. This will seal tightly and the light should join the other
end nicely.

I just brought a 02 745i and I can't get my radio to work I tried a cd still nothing no sound. I haven't tryed to DVD can somebody please help what to do thanks