The car is a 2002 bmw 330 ci conv. The indash navigation, tv, radio, cd, and screen not working. All controls on head unit are dead and the screen is blank. The hand controls on the steering wheel work the radio and the blue tooth. All fuses are good in trunk and in glove compartment. BMW dealer wants $4,000.00 to replace both front head unit and trunk unit. It can't be both. How do I tell whats wrong? Any good ideas?
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Re: mk4 head unit not working
Thats an interesting one. My first suggestion would be to look at the DVD navigation unit in the trunk, does it have any sign of life, i.e will it eject the map dvd is there a blinking redlight etc, if there is nothing then thats most likely your problem if there life in it then I would suggest having a closer look at all the connections in the trunk. You need to remove the side cover in the trunk and check the connections.
If the above doesn't help, my guess would be your head unit has the fault.
The cheapest way to get this repaired is by process of elimination. If you think the DVD unit in the trunk is faulty I would buy one from ebay if you find this doesn't solve your problem you can always resell it on ebay without losing money and the same with your head unit.
Hope this helps. Good Luck.
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ECU means Emission Control Unit. This is the computer and you need the OBDII to read the code. That code itells you where is the problem of your car. Only mechanic has this device. You can get your own too. Its only $65.00. Shop to online more cheaper. It is neccessary to have this device so that you know what you are telling when you go to the mechanic. They can not cheat you You can use this too to reset the computer. So very usefull for the cars. ok.
Hi , it is posable to change the language on the display , it can be tricky to change , unless you can translate german , other than that you should be able to visit a dealer to solve this problem . regards mark
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Dude, i had the same problem. I tightened up the relay from the positive terminal on the battery that sits right next to the terminal, i took off the negative and put it back on, and unplugged the wires that go from amp to speakers and plugged them back in. started working fine. It would be your best bet to reset the comp by taking off neg. and putting back on.
Had the same problem with my '03 330xi. Navigation worked fine but radio and CD did not work at all. I opened the fuse box located in the glove compartment to check the three fuses associated with the navigation system and radio. #7, #39, and #41. All three fuses were intact so I put them back in. I then put the key into the ignition, turned it to position 2 and miraculously the radio came to life. I guess it acted as some type of reset?