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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > AUDIO/VIDEO + BLUETOOTH + Electronics/Alarm/Software > Radio n SOS issue



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      02-21-2013, 12:29 AM   #1
mightye90
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Radio n SOS issue

Alright so the other day I got in to my car pushed the cluch pedal an started it . In a couple of seconds the SOS light on my dash popped up an had a cross threw it so I thought maybe the fuse. So I turn on the radio. It's runs fine xm am fm cd but no audio is playing out of them I look in the trunk the amp is not turning on. So I looked Around the forms an there's to many different subject about it. One of them is the amp went out. Or the fuse . Or something with a wire. An the some relay issues ext.. I really would like to here from u you guys. Maybe a DIY ? Thanks all
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      02-21-2013, 12:49 AM   #2
ctuna
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What kind of sound system do you have?

What kind of sound system do you have?
If its L7 the amp is connected to the most bus .
Anything bad on the most bus breaks the Most Bus Loop.
And that makes all the devices on the Most Bus look bad.
Depending on the year of your car an options there
could be several devices in the loop. TCU , sdars , bmw assist are some of the common ones.
The TCU is the telephone control unit.
The thing that most commonly fails is the L7 amp.


http://www.e90post.com/forums/attach...2&d=1260829447

http://www.bawarec.ru/manuals/3er/e9...3er-e90-12.pdf

There are some places to get the amp repaired.
Repair resources
http://www.e90post.com/forums/showthread.php?t=635672
http://www.bmwgm5.com/Logic7_6941681.htm
http://cgi.ebay.com/ebaymotors/BMW-C...ioQ5fVideo#ht_
http://www.diyparadise.net/bmw_cd73_repair.html
http://www.bmwradiorepair.com/?gclid...FccbQgodIEn0Cg

Last edited by ctuna; 02-21-2013 at 12:55 AM.
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      02-21-2013, 03:25 AM   #3
mightye90
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It's a 07 325i with the logic 7 it think it's a big silver amp in the trunk. I believe it's the logic 7 one sounds amazing
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      06-22-2017, 10:21 PM   #4
triax37
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For those that struggle with the pictogram relay+fuse box in the glove compartment, this page has pretty helpful info (and helped me find a blown fuse #34 that had turned my amp off):

http://fusesdiagram.com/bmw/fuse-box...bmw-3-e90.html

In case the website gets taken down:

Pre-3/2007 (I think)


R1 Windscreen wiper motor relay
R2 Heated rear window relay
R3 Rear screen wiper relay
R4
R5 Headlamp washer pump relay
R6 Secondary air injection (AIR) pump relay

F1 (15A) ^08/05: Transmission control module (TCM)
F2 (5A)Aerial selection control module
F3
F4 (5A) Ignition switch control module
F5 (7,5A)
F6 (15A) Transmission control module (TCM)
F7 (20A) Auxiliary heater control module
F8 (5A)
F9 (10A) Cruise control distance range control module
F10 (15A) Tow bar retract control module
F11 (10A) Audio unit
F12 (20A)
F13 (5A)
F14
F15
F16 (15A) Horns
F17
F18 (5A) CD changer
F19 (7,5A)
F20 (5A)
F21 (7,5A)
F22 (10A) Cruise control distance range control module
F23 (10A)
F24 (5A) Tyre pressure monitor control module
F25 (10A)
F26 (10A)Telematics
F27 (5A)
F28 (5A)
F29 (5A)
F30 (20A) bmw e90 cigarette lighter fuse
F31 (30A) ^08/05:ABSsystem
F32 (30A)
F33 (30A) Electric front seats
F34 (30A) Audio unit output amplifier
F35 (20A) ^08/05 Engine management
F36 (30A)
F37 (30A) Electric front seats
F38 (30A)
F39 (30A) Windscreen wipers
F40 (20A)
F41 (30A)
F42 (30A)
F43 (30A) Head lamp washers
F44 (30A)Trailer control module
F45 (20A)
F46 (30A) Heated rear window
F47 (20A)
F48
F49 (30A) Heated front seats
F50 (40A)
F51 (50A) Ignition switch control module
F52 (50A)
F53 (50A)
F54 (60A) Engine management
F55
F56 (15A) Central locking system
F57 (15A) Central locking system
F58 (5A)
F59 (5A) Steering column function control module
F60 (7,5A) AC control module
F61 (10A)
F62 (30A) Rear electric windows
F63 (30A)
F64 (30A) Rear electric windows
F65 (40A) ABS system
F66 (50A)
F67 (50A) AC/heater blower control module
F68
F69 (50A) Engine coolant blower motor
F70
F71 Spare
F72 Spare
F73 Spare
F74 Spare
F75 Spare
F76 Spare
F77 Spare
F78 Spare

Post-3/2007 (I think)


R1 Rear screen wiper relay
R2 Windscreen wiper motor relay
R3

F1 (10A) Roll-over bar control module
F2 (5A)
F3
F4 (5A) Ignition switch control module
F5 (20A) Fuel pump(FP)
F6 (15A)^08/07:Transmission control module (TCM)
F7 (20A) Auxiliary heater control module
F8 (20A) Audio unit output amplifier
F9 (10A) Cruise control distance range control module
F10 (15A) Tow bar retract control module
F11 (10A)^08/07: Audio unit
F12 (20A)
F13 (5A) Tyre pressure monitor control module
F14
F15 (5A) AC Intake air purity sensor
F16 (15A) ^08/07:Horns
F17 (10A)
F18 (5A) Aerie selection control module
F19 (7,5A) Alarm system
F20 (5A)
F21 (7,5A)
F22 (10A) Cruise control distance range control module
F23 (10A)
F24
(5A) Tyre pressure monitor control module
F25
(10A) Seat belt presenter control module
F26
(10A) Telematics
F27 (5A)
F28 (5A)
F29 (5A) Seat heating
F30 (20A) bmw e90 cigarette lighter fuse
F31 (20A) Multimedia control module
F32 (30A) Seat adjustment control module, left front
F33 (5A)
F34 (5A) CD changer
F35 (30A) ABS system
F36 (30A)
F37 (10A)
F38 (30A)
F39 (30A)
F40 (7,5A)
F41 (30A)
F42 (40A)
F43 (30A) Head lamp washers
F44 (30A) Trailer control module
F45 (40A)
F46 (30A) Heated rear window
F47 (20A) Trailer socket
F48
F49 (30A)^08/07:Seat adjustmentcontrol module, right front
F50 (10A) Engine control module (ECM)
F51 (50A) Ignition switch control module
F52 (20A)
F53 (20A)
F54 (30A) Trailer control module
F55
F56 (15A) Central locking system
F57 (15A) Central locking system
F58 (5A)
F59 (5A) Steering column function control module
F60 (7,5A) AC control module
F61 (10A)
F62 (30A) Rear electric windows
F63 (30A)
F64 (30A) Rear electric windows
F65 (40A) ABS system
F66 (50A)
F67 (30A) AC/heater blower control module
F68 (40A)
F69 (50A) Engine coolant blower motor
F70
F71 (20A) Trailer socket
F72
F73
F74 (10A)
F75 (10A)
F76 (20A/30A)
F77 (30A)
F78 (30A)
F79 (30A)
F80
F81 (30A) Trailer control module
F82
F83
F84 (30A) Head lamp washers
F85
F86
F87
F88 (20A) 08/07 Engine management
F89 Spare
F90 Spare
F91 Spare
F92 Spare
F93 Spare
F94 Spare
F95 Spare
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