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E36/7 Z3 (1996-2002)
E36/7 Z3 Roadster, Z3 coupe, Z3 M Roadster and Z3 M Coupe talk with our gurus here.

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  #1  
Old 10-06-2014, 08:08 AM
bdarbyups bdarbyups is offline
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Location: Arkansas
 
Join Date: Oct 2014
Posts: 3
Mein Auto: Z3
Angry Radio volume problem

Have a 2002 Z3 with Blaupunkt Business CD. The volume dial won't lower or increase the sound. Any thing I can do or do I need to replace unit?
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  #2  
Old 10-06-2014, 12:56 PM
Bob's Shoe Bob's Shoe is offline
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Location: Newport News, Virginia
 
Join Date: May 2014
Posts: 59
Mein Auto: 1996 Z3 E36(7) M44
Welcome!
It is well documented about the volume controls on the business radio and business cd. I recently had mine out because of the issue. I used Deoxit spray on the volume control. I don't know how it will hold up. I can feel and hear the difference in control it self. It has a sharper sound (clicks) when turning the control.
Some notes: Make sure you have a security code for your unit. Disconnect the battery neg terminal. The connecting wire harness will be stiff and there is a picture on to show you where to lift it up to release the connector. The top of the unit has 4 screws which will have to be removed for access. The volume control knob should come off. I took my face plate off as well. I stood the unit up on its backend and sprayed the volume control while turning it back and forth. I left it for a while standing that way so it soak in. I also sprayed underneath and from the top down.
I let it sit overnight. It is working perfectly now. Fingers crossed.
Good luck

Look at post 81
http://forums.bimmerforums.com/forum...-display/page4

Last edited by Bob's Shoe; 10-06-2014 at 02:30 PM.
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  #3  
Old 10-06-2014, 07:06 PM
bdarbyups bdarbyups is offline
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Location: Arkansas
 
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Thanks for the info, I have my code will give it a try
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  #4  
Old 10-07-2014, 02:34 PM
Alfre Alfre is offline
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Location: Charlotte, NC, USA
 
Join Date: Aug 2013
Posts: 84
Mein Auto: Z3, 635csi. R1100RT
I had previously posted of my head unit problems. After sending my HU back for warranty repair, the volume was constant. Would not go up or down. Repair shop said likely an amp problem. I couldn't see how the amp would control the volume, sent it back and they played it for me over the phone with the volume working. Sent it back to me (wasted shipping two ways) and didn't know what to do next. Was considering swapping out the amp.

I searched literally for weeks on the internet and finally ran across a post on another BMW forum (by an E39 owner) who had the same problem and corrected it by disconnecting the neg. battery cable for 30 min. and it cured the problem

I thought "hell, this ain't gonna work" but it was too simple not to try.
Disconnected the neg. cable, forgot about it for an hour and a half, went back and connected the battery, entered the radio code and damned it it didn't work!!!!!!

Try it and let me know if it works for you as well.

Alfre
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  #5  
Old 10-07-2014, 02:48 PM
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vintage42 vintage42 is offline
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Location: Louisville, KY
 
Join Date: Jun 2007
Posts: 1,584
Mein Auto: 1997 BMW Z3 1.9 5MT
Quote:
Originally Posted by Alfre View Post
... Disconnected the neg. cable, forgot about it for an hour and a half, went back and connected the battery, entered the radio code and damned it it didn't work!...
Did you disconnect the battery under the hood? If not, why?
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  #6  
Old 10-07-2014, 03:12 PM
Alfre Alfre is offline
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Location: Charlotte, NC, USA
 
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Mein Auto: Z3, 635csi. R1100RT
Yes, my battery is under the hood. So that is where I disconnected the neg. cable at the battery terminal.

Not sure I understood your question?
Anyway a simple fix to this particular amp problem.

Alfre
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  #7  
Old 10-07-2014, 04:52 PM
vintage42's Avatar
vintage42 vintage42 is offline
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Location: Louisville, KY
 
Join Date: Jun 2007
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Mein Auto: 1997 BMW Z3 1.9 5MT
Quote:
Originally Posted by Alfre View Post
Yes, my battery is under the hood. So that is where I disconnected the neg. cable at the battery terminal. Not sure I understood your question?...
My battery is in the trunk. Having looked in the trunk, it looks easier to disconnect it under my hood, I would think. That's why I asked, but you cannot answer as your battery is not in the trunk.
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  #8  
Old 10-10-2014, 05:06 PM
bdarbyups bdarbyups is offline
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Location: Arkansas
 
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Posts: 3
Mein Auto: Z3
Radio problem

Some how the volume started to work, I tried turning the button slowly and it worked, thanks for the replies.
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