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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 09-17-2010, 10:26 AM
JohnStufflebeem JohnStufflebeem is offline
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Mein Auto: '03 745Li
Cool 03 745Li - Stereo troubleshooting

Newcomer to Bmr'fest as new owner of '03 745Li E66 in USA. Need help troubleshooting OEM audio problem. When listening to radio or CD, right side speakers occasionally drop out with audible electronic buzz coming from left speakers. No rhyme or reason for drop out, e.g. not related to hard turn, accel, decel, or bumps. Also not related to use of navi system. Don't use in-car BMW phone. Problem comes and goes as it wishes; does not appear to be temp related. Cycling fuse has no effect. No apparent problems with iDrive, e.g. all functions work normally. Any ideas? Thanks in advance.
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  #2  
Old 09-18-2010, 12:18 PM
NCwhiteout NCwhiteout is offline
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Location: Charlotte, North Carolina
 
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Mein Auto: 02 745Li
no expert here but it sounds like you have a loose wire somewhere or something of that nature??
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  #3  
Old 09-23-2010, 01:05 PM
umbcumcp umbcumcp is offline
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Did you fix it?

I have exact same problem...Did you fix it?
I have 02 745i...
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  #4  
Old 09-23-2010, 04:10 PM
irokdastar383 irokdastar383 is offline
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is it happeneing to the front speaker on the right side , rear or both? also does it sound like someone is unplugging the power and its going in and out i might know what it is .
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  #5  
Old 09-23-2010, 08:23 PM
Keif Keif is offline
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If your front door speakers are some of the ones dropping out, you likely need a new ASK (audio system kontroller, the single-disc CD player in the center console). Look up the Logic 7 wiring diagram on the DIY board to help determine what goes to the ASK and what goes to the amp, and narrow it down from there.
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  #6  
Old 09-23-2010, 10:05 PM
irokdastar383 irokdastar383 is offline
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keif since your here i got a question . were can i find a switched 12v source in the trunk. can just connect a wire to the sunroof fuse?
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  #7  
Old 09-23-2010, 11:21 PM
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mj745 mj745 is offline
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Quote:
Originally Posted by irokdastar383 View Post
keif since your here i got a question . were can i find a switched 12v source in the trunk. can just connect a wire to the sunroof fuse?
irok why don't you use the dome light (the center ceiling light)? It has 12 volt power and ground.
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  #8  
Old 09-24-2010, 11:03 AM
umbcumcp umbcumcp is offline
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front speaker right side only...
Rear speaker seems fine...
You know what it is?
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  #9  
Old 09-24-2010, 01:23 PM
TechFreak TechFreak is offline
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Originally Posted by mj745 View Post
irok why don't you use the dome light (the center ceiling light)? It has 12 volt power and ground.
Because it's not switched from the ignition like he wants to do ....all interior lighting is connected to the 'Power Module' which switches the power off after 16 mins.

The only switched +12v source is the 'Brake Light' cable in the drivers footwell.

Just fit a manual switch.
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Last edited by TechFreak; 09-24-2010 at 01:28 PM.
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  #10  
Old 09-24-2010, 01:33 PM
TechFreak TechFreak is offline
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Quote:
Originally Posted by umbcumcp View Post
front speaker right side only...
Rear speaker seems fine...
You know what it is?
Keif is correct ....problem is ASK-CD unit.
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  #11  
Old 09-24-2010, 03:06 PM
Keif Keif is offline
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Quote:
Originally Posted by umbcumcp View Post
front speaker right side only...
Rear speaker seems fine...
You know what it is?
Well, if you narrow it down to a single speaker then maybe you do indeed have a blown speaker or loose wire...multiple speakers involved and you're likely looking at a new ASK. Hopefully you'll educate us all and find out the left buzzing is just part of a weird load on the right side or a protection mechanism in the ASK for when something starts shorting out. Again, if the main issue is with one speaker, try poking around there first.
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Last edited by Keif; 09-24-2010 at 03:09 PM.
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  #12  
Old 09-26-2010, 10:29 AM
boyer357 boyer357 is offline
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Question

I have the exact problem on only the front passenger side door-
-sound cutting off on, crackling, hear a hissing sound with stereo not on -- Took the ask out..felt for loose wires--nothing-then took door panel off(thanks Keifer) tested speaker while installed with multimeter--appears random power issue-to speaker
and took speaker out --tested it with 9 volt-it ping'd-appearing good-then left that speaker un-hooked---Then jammed the stereo no problem--everything works fine without speaker--
Two questions:
is it the ASK unit-best place to find a used one?

Air Bag light on-i am showing a passenger air bag fault -how do I fix?

any other questions, suggestions and comments are welcome--

Loyal fan of the fest
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  #13  
Old 09-26-2010, 11:27 AM
TechFreak TechFreak is offline
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This is gonna sound odd..........

All those with intermittent front popping or crackling speakers........when the problem is NOT there and the sound is fine......Press your horn.......does it make the problem come back ?
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  #14  
Old 09-26-2010, 12:31 PM
boyer357 boyer357 is offline
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Horn made no difference when then speaker was in or not--
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  #15  
Old 09-26-2010, 03:36 PM
TechFreak TechFreak is offline
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Quote:
Originally Posted by boyer357 View Post
Horn made no difference when then speaker was in or not--
Reason i ask is ...i have a problem when it's cold outside .....my right front door speak buzz's until things have heated up a bit....but i can bring the problem back when i push my horn.....

I don't get it that often as it's not that cold here just now.

I suspect my ASK-CD unit doesn't like the cold.
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Last edited by TechFreak; 09-26-2010 at 03:40 PM.
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  #16  
Old 09-27-2010, 10:11 AM
irokdastar383 irokdastar383 is offline
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Quote:
Originally Posted by TechFreak View Post
Because it's not switched from the ignition like he wants to do ....all interior lighting is connected to the 'Power Module' which switches the power off after 16 mins.

The only switched +12v source is the 'Brake Light' cable in the drivers footwell.

Just fit a manual switch.
i really dont want to start running wires front to back its a hassle plus i got to remove the rear seats. i am thinking about this and see if it will work. what if i hook the 12v switched wire to the sunroof fuse . i dont care that it shuts off after 16 min. what do you think.
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  #17  
Old 09-27-2010, 01:02 PM
TechFreak TechFreak is offline
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Quote:
Originally Posted by irokdastar383 View Post
i really dont want to start running wires front to back its a hassle plus i got to remove the rear seats. i am thinking about this and see if it will work. what if i hook the 12v switched wire to the sunroof fuse . i dont care that it shuts off after 16 min. what do you think.
Sunroof will be a pain to get to.....you could try any of the interior lights ....think they shut off after 16 mins to ....
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Last edited by TechFreak; 09-27-2010 at 01:32 PM.
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  #18  
Old 09-27-2010, 01:23 PM
irokdastar383 irokdastar383 is offline
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why? the fuse for the sunroof is in the trunk
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  #19  
Old 09-27-2010, 01:34 PM
TechFreak TechFreak is offline
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Quote:
Originally Posted by irokdastar383 View Post
why? the fuse for the sunroof is in the trunk
You could give it a go ...just i like connecting to somewhere on a circuit that i know is a circuit on it's own.

If you mess with the fuse box and disturb something else then it could be a real headache.
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  #20  
Old 09-27-2010, 01:37 PM
irokdastar383 irokdastar383 is offline
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no i was thinking of hook it up to the fuse it self that goes to the sunroof.
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  #21  
Old 09-27-2010, 10:05 PM
Keif Keif is offline
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Location: Houston, TX
 
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Mein Auto: 2007 Alpina B7
Quote:
Originally Posted by boyer357 View Post
I have the exact problem on only the front passenger side door-
-sound cutting off on, crackling, hear a hissing sound with stereo not on -- Took the ask out..felt for loose wires--nothing-then took door panel off(thanks Keifer) tested speaker while installed with multimeter--appears random power issue-to speaker
and took speaker out --tested it with 9 volt-it ping'd-appearing good-then left that speaker un-hooked---Then jammed the stereo no problem--everything works fine without speaker--
Two questions:
is it the ASK unit-best place to find a used one?

Air Bag light on-i am showing a passenger air bag fault -how do I fix?

any other questions, suggestions and comments are welcome--

Loyal fan of the fest
Maybe attach another speaker to those wires and see if it has the same effect? So, that would let you say that maybe the voice coil is shorting a bit occasionally within the speaker, or maybe the speaker is fine, and it's either the ASK, the wiring, the door module, etc.

Regarding the airbag fault...I think you can drop battery power and it'll clear (assuming the fault is no longer there), though maybe TechFreak or one of the other guys can chime in here and correct me or verify.
__________________
 
Black 2007 Alpina B7
Tension strut bushings
 
White 2007 Alpina B7
Supercharger clutch/bearings, replaced exhaust valve/pulled head, sunroof seal, 6000K angel eyes
 
Black 2002 BMW 745Li (sold)
KW v3's, blue angel eyes, 8000K headlights & HID fogs, rebuilt alternator & mounting bracket gasket, sunroof seal, CCVs, plugs, sway bar bushings, timing & valve cover gaskets, valve stem seals, guibo joint, mechatronic sealing sleeve, trans fluid, sanded headlights...

Last edited by Keif; 09-27-2010 at 10:11 PM.
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