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  #1  
Old 05-30-2006, 10:45 AM
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NAVIGATION and Stereo not working

Hey all,

My 2000 4.4 has a navigation and premium sound system that is not working. At first the navigation started to blink off and on when entering in destinations but the stereo was fine. Had it at the stealer and they told me like $3000 to relpace the computer module? Now the stereo stopped working (at least the sound anyway) I can turn it on and scroll through the stations but no sound comes out of the speakers? The other thing is that the car battery gets drained completely even if the car is turned off. There is a sound coming from the navigation cd changer like it is cycling for a disk even with no disk inside. I took the fuses out so my battery will not drain. Any ideas on how I can fix this problem for less than the dealer price? Or am I better to just get a new stereo and nav system? Help me X5 Family!
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  #2  
Old 05-30-2006, 11:10 AM
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You have a very strange set of symptoms, but I am guessing that the dealer's diagnosis is correct. Here is some quick background to help further diagnose. Then I have some more questions and suggestions...

The DSP amp is dependent on the nav computer to operate. It expects to receive control messages from the nav computer, and if it does not see them, the DSP amp will shut itself off after about 30 seconds. However, if you switch the radio off and then back on, you will get audio for another 30 seconds or so, before the amp turns off again. This is typically what you will see in a car when the nav computer has failed.

So, for my first question: is your navigation system original to the car (it should be a MKII version computer and the 4:3 screen)? If not original, is it an upgrade or retrofit? What components do you have?

Next question: Do you ever get sound in the car? For example, if you turn it off and then back on, will it play for about 30 seconds? If so, this points to a dead nav computer.

Normally, when a nav computer fails, you will lose the screen entirely. You may be able to use the radio knob to turn the radio on and off, switch channels, raise and lower volume, etc. But the screen will be dark and none of its functions other menu functions will work at all. (And of course, if you have DSP, the radio will turn off after 30 seconds.) It sounds like your screen is working, but no sound. Is this correct? If so, what menu options are you seeing on your screen?

Last question: are you seeing any other odd symptoms, like turn signals not clicking or flashing on the instrument cluster, while they work outside? Or, is your central locking acting strangely at times?

If you are seeing other odd symptoms with components on the I-Bus, then it could be your car's bettery behind the problem or any other I-Bus component causing problems. Although, on the surface, it sounds like your navigation computer is probably dead.

Try this first. Disconnect your battery's positive and negative cables. Then short them together for about 30 minutes. This will completely reset and reboot the car. (DO THIS WITH THE BATTER TOTALLY DISCONNECTED FROM TEH CAR.) Then, reconnect everything and see if the nav computer and discharge problems continue.

Next, remove the navigation computer from the car. This will not fix the stereo, but if the battery discharge problem goes away, you can probably be confident that the nav computer is the cause. If the car still discharges with the nav computer removed, then your problem is either the battery or another component.

If your battery is original to the car, I would put pretty good odds on the fact that the battery is the cause.

If it is the navigation computer, than you can buy a new (used) one on eBay for probably $200 - $300. Or, you could take this as an opportunity to upgrade to a newer and faster MKIII or MKIV BMW navigation computer for a few dollars more.
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  #3  
Old 05-30-2006, 05:47 PM
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more info on the NAV problem

Thanks for your reply Brian. Here is some more info on the problem.

1) My NAV system is original to the vehicle- I purchased it new when I purchased the X5 From the dealer back in 2000 - I am the original owner.

2) I do not get any sound in the car now. I used to get sound when my NAV started 'blinking". I would enter in an address int he NAV and then when it went to calculate the directions it would reset back to an empty address. This happened at first then eventually i could not get into the NAV GPS menus without the screen turning black and then coming back on again. That it what the system does now if I put the fuses back in. I should mention that when this started to happen the stereo worked fine. As time progressed I think the stereo started to cut out a you mentioned until eventually now there is no sound at all. Is there a way to get the sound back without replacing the NAV unit at the moment? Can I bypass the NAV unit so the DSP AMP will work?

3) I have had some other odd symptoms like the turn signal flashing fast even though the bulbs are fine. It flashes fast and then works normally. Also, once in a while the hazzards will flash for no reason (that only happens about twice a year).

4) My originaly battery was replaced by the dealer about 2 years ago so I think it is ok.

Finally, you said to disconnect the battery +ve and -ve cables from the battery (where is the battery in the X5???) Sorry for my ignorance but it seems to be hidden in the trunk maybe?

Thanks Brian
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Old 05-30-2006, 06:03 PM
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Remove your spare tire and you'll see the battery...
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  #5  
Old 07-05-2006, 11:55 PM
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No sound from Stereo with Nav MKIII and DSP

Well now I just replaced the Nav Unit to (an ebay special) MKIII and while my screen works (computer and Navigation menus) my stereo still just tunrs on with the button and I can cycle the stations switch to tape or CD but there is no sound at all through the speakers. Not sure if I needed to do anything special when I installed the MKIII unit. I had a standard MKII unit in my 2000 X5 originally. Is there any software upgrade or other installation things I need to do other than plug in the red, blue, and black connectors along with the small skinny wire?

Also, when I first installed this new MKIII unit the options for DSP and phone were available on the menu but now after about 30 minutes of being hooked up those two options are no longer on the menu?

Anybody know why?

Thanks,

Jay
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  #6  
Old 07-07-2006, 08:53 AM
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First, the thing where you say the DSP and phone option on the new MKIII is somewhat normal. The MKIII will show whatever menu options it had the last time it was connected to a car. Then, it will re-scan its current environment some time after turn-on and update the menu.

However, what is a little troubling is that you have the DSP option in your car, so that should not have disappeared. (Do you have phone?)

Anyway, if the nav computer can not find the DSP amp, it will remove it from the menu. That means that the DSP amp is not communicating with the rest of the car. That would explain why your radio does not have any sound. I suspect that your DSP amp has failed also, which means you have multiple, coincidental component failures.

I would inspect your trunk area very carefully for signs of water entry. Plus, give your old nav computer a careful look too, and check the DSP amp. If you had multiple parts fail at about the same time, then I suspect water damage caused it.
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