E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > E46 BMW > General E46 Forum

General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 05-29-2015, 01:52 PM   #1
46m3
Registered User
 
Join Date: May 2015
Location: chicago
Posts: 19
My Ride: E46-M3, FD-RX7, TDi
No AM or FM reception at all, please help

Hey everyone I purchased a used 2002 convertible M3 and the sound system doesn't have any radio reception on both AM and FM.

I have taken out the Business CD and on the top of it I think it said that it was from a 328ci so I'm sure someone already replaced the unit maybe because the original one was faulty. This unit only has: big plug for speakers, smaller one under that which I think is for a CD changer which I don't even know where is in the car lol. And an antenna plug, no other plugs...

Now I've read that FM could be effected by the FM booster or the diversity, but when why is both my AM and FM out? I've taken the diversity out, it has the:

BLACK plug, this should be in from real antenna thats mounted on convertibles.
ORANGE plug, this should go to the back of the radio
BLUE plug, this should be IN from the FM booster

And then it has a skinny WHITE wire. DOES WHAT? see pic at bottom

How does the diversity work if it has no GROUND, and 12V wire?

Could it be that it gets GROUND from 2 mounting bolts/nuts, and the WHITE wire give it +12Volt power from the back of the Radio?

PS could it be that the diversity is bad, or that the 328ci radio is bad, cd player part works however.

Please help, I have everything disassembles in the trunk and would love to figure it out, its driving me nuts.



.

*** Sign: 007 License Hide Plate Gadget: 007LicensePlate.com ***

Last edited by 46m3; 06-03-2015 at 07:05 PM.
46m3 is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 05-29-2015, 02:03 PM   #2
wasp9166
ima touching member
 
wasp9166's Avatar
 
Join Date: Dec 2007
Location: straight out da bronx
Posts: 5,870
My Ride: 04 330i jet black
Send a message via Yahoo to wasp9166
get sirius


reg radio is god awful
__________________

"if polarity comes from protons, does morality come from morons?"

Quote:
Originally Posted by russ330 View Post
"Mommy and Daddy are getting a divorce now because wasp9166 had to piitb with Mom."
wasp9166 is offline   Reply With Quote
Old 05-29-2015, 02:04 PM   #3
jdstrickland
Registered User
 
Join Date: Apr 2010
Location: Murrieta, CA
Posts: 8,203
My Ride: '94 325iC & '00 323i
Does the unit make music at all? Or, is only the radio side of it silent? If there is a CD or MP3 player capability that works, but the radio does not, then the unit is probably toast. The radio needs to have the antenna else it will make a hissing sound.

The car could have had an aftermarket unit installed that was removed to make the car ready for sale, and the unit that was put back in to fill the hole does not work or the system is not complete. You really haven't given very many clues.
jdstrickland is offline   Reply With Quote
Old 05-29-2015, 02:17 PM   #4
46m3
Registered User
 
Join Date: May 2015
Location: chicago
Posts: 19
My Ride: E46-M3, FD-RX7, TDi
Yes the unit plays CDs perfect, volume works, all the settings work, nothing wrong with the radio other then AM FM. From what I see all the wire in the back of the BMW business CD player is stock, unmodified in any way. Diversity unit and the FM booster are all there as well. I do not believe anyone had an aftermarket unit in there before but I wouldn't know how else to tell.

PS, tested the skinny WHITE WIRE on the diversity and it has 12V+ power when the Radio is ON, so that good news.

What happens if the diversity is dead? Would both AM and FM be effected or only FM?


.

Last edited by 46m3; 05-29-2015 at 02:20 PM.
46m3 is offline   Reply With Quote
Old 05-29-2015, 02:26 PM   #5
46m3
Registered User
 
Join Date: May 2015
Location: chicago
Posts: 19
My Ride: E46-M3, FD-RX7, TDi
Quote:
Originally Posted by jdstrickland View Post
is only the radio side of it silent?
Didn't answer this, no radio side plays static, just does not get reception on either AM/FM. Not even a little bit as far as I can hear.
46m3 is offline   Reply With Quote
Old 05-29-2015, 02:32 PM   #6
jdstrickland
Registered User
 
Join Date: Apr 2010
Location: Murrieta, CA
Posts: 8,203
My Ride: '94 325iC & '00 323i
Then you need to chase down the antenna lead. I don't know what the thing is that you took a picture of, but if the system works except for the radio, then either the radio side of the head unit is toast or the antenna is not plugged in.

I do not know what the diversity thing is, but it should affect everything, not just AM or FM, or both, but not other stuff.

Last edited by jdstrickland; 05-29-2015 at 02:33 PM.
jdstrickland is offline   Reply With Quote
Old 05-29-2015, 02:34 PM   #7
jdstrickland
Registered User
 
Join Date: Apr 2010
Location: Murrieta, CA
Posts: 8,203
My Ride: '94 325iC & '00 323i
If you are playing static in radio mode, then your antenna is not connected or the tuner has failed.
jdstrickland is offline   Reply With Quote
Old 05-29-2015, 02:35 PM   #8
jdstrickland
Registered User
 
Join Date: Apr 2010
Location: Murrieta, CA
Posts: 8,203
My Ride: '94 325iC & '00 323i
Since the tuner for AM and the tuner for FM are different, then it stands to reason that the antenna is not connected.
jdstrickland is offline   Reply With Quote
Old 05-29-2015, 02:38 PM   #9
46m3
Registered User
 
Join Date: May 2015
Location: chicago
Posts: 19
My Ride: E46-M3, FD-RX7, TDi
Yea I checked and antenna is connected both at the bottom of the antenna and back of the radio.
46m3 is offline   Reply With Quote
Old 05-29-2015, 05:45 PM   #10
46m3
Registered User
 
Join Date: May 2015
Location: chicago
Posts: 19
My Ride: E46-M3, FD-RX7, TDi
I think I figured it out for anyone in the future. I think whoever replaced the business CD, replaced it with a 2001 and older model CD player and since my car is a 2002 it need the newer model business CD since the diversity in pre 01 and 02+ were different is my understanding. So just need to buy a 2002+ business bmw CD player.

so pre 01 CD player uses older diversity
02+ use a newer diversity and they are not interchangeable... lol maybe, I'll know when I get a 02+ cd player
46m3 is offline   Reply With Quote
Old 05-30-2015, 09:35 AM   #11
markusmarkus
Registered User
 
Join Date: Jul 2008
Location: USA
Posts: 2,394
My Ride: 2001 330Ci
OP, I bet your antenna amplifier (located on the drivers side "C" pillar) is kaput. Or, the antenna amp isn't getting power.

Remove (very carefully) the "C" pillar cover by:
- remove the light and disconnect it from the wiring harness
- unbolt the 10mm (?) bolt
- gently pry the cover off

Use Gorilla Glue to fix any of the plastic parts on the cover that break!

With the head unit on the antenna amp should've getting 12VDC. Since the audio amp is working we know that the head unit is sending out 12VDC. This signal turns on the audio amp, and provides power to the antenna amp.

Check and clean the RF connections. If this doesn't work the antenna amp is most likely kaput. Make sure the new antenna amp is the same as the old one. It should be stamped "315mhz."
markusmarkus is offline   Reply With Quote
Old 05-30-2015, 09:42 AM   #12
jfoj
Registered User
 
Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 15,645
My Ride: 330CiC, M5, X5
Quote:
Originally Posted by markusmarkus View Post
OP, I bet your antenna amplifier (located on the drivers side "C" pillar) is kaput. Or, the antenna amp isn't getting power.

Remove (very carefully) the "C" pillar cover by:
- remove the light and disconnect it from the wiring harness
- unbolt the 10mm (?) bolt
- gently pry the cover off

Use Gorilla Glue to fix any of the plastic parts on the cover that break!
Markus, I think you must have partied too hard last night.

Maybe you missed this statement:

Quote:
Originally Posted by 46m3 View Post
Hey everyone I purchased a used 2002 convertible M3
__________________
Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose temp switch O-ring - BMW #13621743299
jfoj is online now   Reply With Quote
Old 05-31-2015, 07:49 AM   #13
markusmarkus
Registered User
 
Join Date: Jul 2008
Location: USA
Posts: 2,394
My Ride: 2001 330Ci
Oops! No, it's old age!!!!! I still think your antenna amp is bad, wherever it's located in your vert!
markusmarkus is offline   Reply With Quote
Old 05-31-2015, 01:40 PM   #14
jdstrickland
Registered User
 
Join Date: Apr 2010
Location: Murrieta, CA
Posts: 8,203
My Ride: '94 325iC & '00 323i
I'm with markus on this one. The antenna amp is not working, OR the tuner in the radio is dead.

I do not think it's a diversity issue. I could be wrong on this point, but I believe that the diversity is an output enhancement that is applied to all audio, including the AM/FM radio channels. Since all outputs play sound, except the AM/FM, then either the antenna is not connected -- amp is toast -- or the radio module within the head unit is dead.
jdstrickland is offline   Reply With Quote
Old 05-31-2015, 10:37 PM   #15
46m3
Registered User
 
Join Date: May 2015
Location: chicago
Posts: 19
My Ride: E46-M3, FD-RX7, TDi
Hey guys thanks for the suggestions, been busy replacing the water-pump on the m3. It was wobbly, bearings were pretty messed up.

But I ordered a Business CD player from a 2004 m3, got a great deal for $45 shipped. I will see if that fixes it, if not then I will replace the diversity aka antenna amp. My antenna amp does get 12v power on the white wire when the CD player is on, so like you guys said, either ANTENNA AMP is dead, or the RADIO TUNER inside the CD player is dead. Seeing how its a convertible car, someone could have left the top up when it rained which is pretty common so I wouldn't be surprised if the tuner is dead. Does anyone know if the antenna amp is DEAD or unpluged, do you still get at least some reception? Mine gets NONE on both AM/AF, just static.

PS on convertible M3s diversity/antenna amp is in the trunk on the driver side, right under the antenna.

Last edited by 46m3; 05-31-2015 at 10:44 PM.
46m3 is offline   Reply With Quote
Old 06-01-2015, 12:57 AM   #16
NumbaOneNewb
Registered User
 
Join Date: Jul 2012
Location: Portland, OR
Posts: 3,334
My Ride: 2003 330CI Silver
From what I know, the issue is this. Pre 2001 had the radio reception and amplifier wires built into one while 2001 and newer was two wires. Or.vice versa
__________________
Portland Metro: ECU updates, Euro tune, euro corner delete, air bag light, DSC light, cluster and any led color change, soldering work, transponders for keys, and all custom work related to computer or electronics.DIY AK90 A walk through on coding your mcu and transponders EWS3 How to make your own key (ak90 review)
NumbaOneNewb is offline   Reply With Quote
Old 06-01-2015, 12:59 AM   #17
NumbaOneNewb
Registered User
 
Join Date: Jul 2012
Location: Portland, OR
Posts: 3,334
My Ride: 2003 330CI Silver
The white wire is not the remote wire for the radio, I don't think it is. The white wire should be the remote wire for the amp
__________________
Portland Metro: ECU updates, Euro tune, euro corner delete, air bag light, DSC light, cluster and any led color change, soldering work, transponders for keys, and all custom work related to computer or electronics.DIY AK90 A walk through on coding your mcu and transponders EWS3 How to make your own key (ak90 review)
NumbaOneNewb is offline   Reply With Quote
Old 06-01-2015, 01:02 AM   #18
NumbaOneNewb
Registered User
 
Join Date: Jul 2012
Location: Portland, OR
Posts: 3,334
My Ride: 2003 330CI Silver
If you actually get static noise through your speakers, it means that the radio amplifier is turning on, there's no reaction reception. I think I had this issue before. Let me do dinner research
__________________
Portland Metro: ECU updates, Euro tune, euro corner delete, air bag light, DSC light, cluster and any led color change, soldering work, transponders for keys, and all custom work related to computer or electronics.DIY AK90 A walk through on coding your mcu and transponders EWS3 How to make your own key (ak90 review)
NumbaOneNewb is offline   Reply With Quote
Old 06-01-2015, 01:17 AM   #19
46m3
Registered User
 
Join Date: May 2015
Location: chicago
Posts: 19
My Ride: E46-M3, FD-RX7, TDi
Well I'll tell you this, the radio that I found in the car had a really big antenna plug on the back of it and a tiny plug for antenna amp, this is what pre 01 used, 2 plugs big for antenna, small for amp. But my 02 M3s actually wiring uses 1 tiny plug for the antenna, there is no other AMP plug at all. So what did is I made a custom plug just so I can plug the tiny wiring harness plug (antenna plug) into the BIGGER antenna plug on this radio which is pre 2001. After making a custom plus so I can plug my 02 wiring into a per 01 radio I still had no reception. Now I purchased a 04 cd/radio which used just 1 tiny plug that my cars wiring harness uses so when I get it I will be able to just plug it in and see what happens.

What I'm suspecting is that pre 01 radio that I have now in the car can not communicate with the 02+ antenna AMP thats in my trunk but an 02+ radio should work. If the 04 radio still gets static, then antenna amp is probably the problem. I've taking the antenna amp totally apart and didn't see any damage on the motherboard. Usually you would see traces of water or if something overheats it leaves marks on the motherboard, I didn't see any problems on the inside inside but it could still be shot.

Last edited by 46m3; 06-01-2015 at 02:52 AM.
46m3 is offline   Reply With Quote
Old 06-03-2015, 07:11 PM   #20
46m3
Registered User
 
Join Date: May 2015
Location: chicago
Posts: 19
My Ride: E46-M3, FD-RX7, TDi
Ok so just to update everyone and for anyone in the future. Business-CD player out of a 2004 e46 BMW fixed my AM/FM problem completely. Everything works fine now.

Like I suspected I do not think you can use a pre 2001 e46 cd-player in a 2002+ e46. If your e46 is 2002+ buy a 2002+ cd-player. I bought a cd-player out of a 2004 just to be safe as some early production 2002 cd-player may not work. And if you have a pre 2001 e46 then a 99-01 cd-player. Before you buy always compare that there are same amount of plugs on the back of the cd-player as the cd-player you are taking out.

PS CD-player out of a 2005+ is what you want as it has the MP3-player too, but these tent to be pricy.
.

.

*** Sign: 007 License Hide Plate Gadget: 007LicensePlate.com ***

Last edited by 46m3; 06-03-2015 at 07:15 PM.
46m3 is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Censor is ON





All times are GMT -5. The time now is 09:41 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use