BMW Universal Bluetooth Manual page 19

Connector Pin Assignments
The 54-pin connector of the ULF Control Module utilizes the following pins on X01185
PIN
1
11
15
17
19
21
22
27
28
32
33
34
35
36
43
44
45
51
52
The following pins on X4545 are utilized when the eject box is connected
PIN Description
1 Cradle Key +
2 KL 31
3 58G
5 KL 30
13 Cradle On/Enable
Note: The pairing button used on the E46 only utilizes pin 1, 2 & 3 of X4545
Description
Microphone +
Cradle On/Enable
I-Bus
KL 30
Microphone -
Microphone Shield
Hook
Programming
Programming
Cradle Key +
Telephone On
Telephone On (pin 33)
KL R (Ignition)
KL 31 (Ground)
Programming
Programming
Programming
Telephone Mute
KL 58g (illumination)
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