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  #1  
Old 08-26-2012, 01:53 PM
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Bluetooth TCU pairs, but no audio

I just completed a bluetooth install on my 2001 530 with a TCU. My problem is that I have no audio. I have the antenna installed under the rear shelf in a location where there is no metal to interfere with signal coming into the cabin, and connected straight to the TCU. Pairing was successful. I can see my phone book on the mid. I can call another phone and the call will connect, but I cant hear then and they can't hear me. They can see my caller ID. I can even go through the menu on the mid and see signal strength. I don't have any sound. I can call from the mid, but cant hear anything. I have tried it with the SES jumper and without. No luck. I sure would appreciate some help. The only connections I have are the antenna and the 25 pin to 54 pin adapter cable to the TCU. Could it be a bad or incompatible TCU? I also have the upgraded mic in the stock location.
TCU part number is 4109120843
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Old 08-27-2012, 01:05 AM
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this is strange TCU number... i would think that BT module would start with a 65 number... does E39 call for a pairing cradle and connections in the center console, to send the audio back to trunk? I think E53 needs something in the console looped back to trunk... check with people from bimmernav - Martin should know about it...
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Old 08-28-2012, 07:29 PM
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I ended up jumping some pins in the 18 pin connector under the armrest. Now I have sound, and can make calls and hear the other party clearly, but they cant hear me. I have DSP, does it make a difference?
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Old 08-28-2012, 09:00 PM
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well, it seems that you looped back the audio portion of the sound, now you need to loop back the mike portion... I did this om my E39 about 8-10 years ago, so i don't remember a thing... but, i know that i used info from the forums, so, you need to search old forums for the pinout of the 18-pin connector... or, check the WDS...
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Old 08-28-2012, 09:13 PM
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Thanks. I will continue searching. I jumped pins 11 and 14 on the 18 pin ejectbox connecter to get the sound. Hopefully I will be able to get the mic working without blowing up any electrics!!
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Old 08-28-2012, 09:24 PM
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this is from BMWTIPS.COM

Posted by Andrew Papanikolas on December 20, 2000 at 00:06:25:

1) Remove the armest and roll-top box.
2) Locate the RJ45 connector
3) wire up a male RJ45 with the following config:

PIN 1 -> Constant +12V on car kit
PIN 2 -> Switched +12V on car kit
PIN 3 -> Ground on car kit
PIN 4 -> Radio Mute on car kit
PIN 5 -> Speaker + on car kit
PIN 6 -> Speaker - on car kit
PIN 7 -> Microphone + on car kit
PIN 8 -> Microphone - on car kit

4) connect your male RJ45 to the connector in the console.
5) On the left side of the trunk above the wheel well find the DB25 connector.
6) Using a male DB25 make the following jumper connections:
PIN 1 -> PIN 5 (switched +12V)
PIN 3 -> PIN 24 (Ground)
PIN 4 -> PIN 6 (constant +12V)
PIN 8 -> PIN 14 (MIC +)
PIN 10 -> PIN 18 (Radio Mute)
PIN 11 -> PIN 19 (Speaker -)
PIN 12 -> PIN 25 (Speaker +)
PIN 14 -> PIN 23 (MIC +)

7) Connect your jumper to the DB25 in the trunk.
8) If your car kit has an antenna output connect it to the antenna wire under the console, connect the two antenna wires together in the trunk, and connect your antenna to the wire in the headliner.
9) If you have DSP you may need to apply +12V to the "cell phone present" signal on the DSP amp. My NAV site details the wiring for this, but I don't have the DB25 PIN assignment for that at this time. If the wire isn't obvious when you do the install then shoot me an email and I'll tear into my connector and let you know.
That should just about do it. Your radio should mute when you are on the phone, and your car kit should use the factory audio. BTW the microphone is in the headliner next to the sunroof switch. -Andrew
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Old 08-28-2012, 09:25 PM
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here is more from the same source:

Explanation of E39, E38, E46 Car Phone Wiring
=============================================

Description of Female DB25 Connector
------------------------------------
Location: Trunk left side
To connect: You need a DB25 male

Pin 1 RJ45-Pin 2
Pin 2 Not Used
Pin 3 Ground
Pin 4 Unswitched 12V (+)
Pin 5 Ignition 12V (+)
Pin 6 RJ45-Pin 1
Pin 7 Not Used
Pin 8 RJ45-Pin 7
Pin 9 Not Used
Pin 10 Radio Mute (Provide Ground to Mute)
Pin 11 RJ45-Pin 6
Pin 12 RJ45-Pin 5
Pin 13 Not Used
Pin 14 Microphone (+)
Pin 15 Microphone (-)
Pin 16 Ground
Pin 17 Unswitched 12V (+)
Pin 18 RJ45-Pin 4
Pin 19 Speaker (-)
Pin 20 Ground for Microphone
Pin 21 Not Used
Pin 22 Not Used
Pin 23 RJ45 Pin 8
Pin 24 RJ45 Pin 3
Pin 25 Speaker (+)


Description of RJ45 Connector
-----------------------------
Location: Under console
To connect: You need a RJ45 male


Pin numbers are for male RJ45

||
========
12345678


Pin 1 DB25 Pin 6
Pin 2 DB25 Pin 1
Pin 3 DB25 Pin 24
Pin 4 DB25 Pin 18
Pin 5 DB25 Pin 12
Pin 6 DB25 Pin 11
Pin 7 DB25 Pin 8
Pin 8 DB25 Pin 23

Antenna Cable (mini UHF - RG-58 Cable)
--------------------------------------
Location: Left side of trunk

There are two (one male + one female) cables in the trunk. Use the male if
you mount your cellular transceiver in the trunk. Connect the male
and female together if you intend to mount the transceiver near the console.

Location: Console
There is a male cable under the console which can be used by following above
instructions.






AndrewP
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