BMW Universal Bluetooth User manual

Initial Print Date: 02/04
Table of Contents
Subject Page
BMW Universal BluetoothTM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
What is BluetoothTM? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Communication/Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Data and Voice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
BluetoothTM Enabled Phones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Advantages of the ULF System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
ULF Control Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Oddment Tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Pairing Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
BluetoothTM Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Initial Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Pairing Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Indicator Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Adopting Telephone Book . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Placing a Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Receiving/Accepting a Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Conducting a Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Ending a Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Transfer Active Call From Phone to ULF . . . . . . . . . . . . . . . . . . . . . . . . .13
Transfer Active Call from ULF to Phone . . . . . . . . . . . . . . . . . . . . . . . . . .14
Linking Several BluetoothTM Mobile Phones . . . . . . . . . . . . . . . . . . . . . .14
Deleting Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Technical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Voice Recognition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Coding ULF Control Module to Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . .16
Function Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
BMW Universal BluetoothTM
Revision Date:

Subject Page
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Connector Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

BMW Universal BluetoothTM
Introduction
The BMW Universal BluetoothTM Hands-
Free System (ULF) utilizes BluetoothTM wire-
less technology to enable a wireless con-
nection to be established between a
BluetoothTM enabled mobile phone and the
ULF Control Module installed in the vehicle.
The combination of these components
results in a new generation of in-vehicle
phone system.
The ULF Control Module forms an interface
that allows a mobile phone with the embed-
ded BluetoothTM wireless technology feature
to be wirelessly integrated into the vehicle.
For the first time BMW is introducing a new generation hands-free telephone system kit
that provides the customer with the option of using various BluetoothTM enabled mobile
phones (a list of recommended phones is available from your BMW Center).
What is BluetoothTM?
The name BluetoothTM is derived from the Danish King Harald Bluetooth who lived in the
10th century. He was well known for his ability to unify his kingdom and today lends his
name to a wireless technology standard that can connect/unify various electronic devices
that are BluetoothTM enabled and located within a short range (approx. 10 m or 32.8 ft) of
each other.
BluetoothTM wireless technology is
a short-range radio frequency tech-
nology standard that allows several
devices to communicate with each
other simultaneously. The standard
indicates that up to seven simulta-
neous connections can be estab-
lished and maintained at one time,
as long as the connected devices
are within a range of 10 m (32.8 ft).
Note: The ULF system will
allow four phones to be paired
to the system at a time and only
allow one phone to be connect-
ed at a time.
3
BluetoothTM
5 Series (E39) - With Oddment Tray

Communication/Security
The system uses the license-free, global Industrial Scientific Medical band (ISM) at 2.45
GHz. This frequency range from 2.402 GHz to 2.480 GHz is subdivided into 79 channels
with a 1 MHz bandwidth.
Signals transmitted through the airways can be scrambled and unscrambled to enhance
communication security. With BluetoothTM technology, communication frequencies are
changed 1600 times per second to reduce the risk of interference or interception of the
transmitted signal. The relatively small operating range of approx. 10 m (32.8 ft) also
enhances the security of this technology, since tampering with the transmitted data is
only possible when inside the 10 m (32.8 ft) wireless "network".
To further enhance the security of this short-range wireless network the ULF system
requires a pairing procedure to be carried out for each device that will be introduced into
the network. As part of this procedure a required passkey must be entered once (during
the initial pairing procedure) to establish a secure connection between the phone and the
ULF Control Module.
Data and Voice
BluetoothTM was developed for the transmission of both voice as well as data. A band-
width of approx. 1 MB/s is available for this purpose.
BluetoothTM Enabled Phones
Ideally all phones that are BluetoothTM enabled should work with the ULF system, howev-
er not all phones utilize the same profiles and therefore may not be recognized by the
ULF System. A list of recommended BluetoothTM enabled phones is available from your
BMW Center.
Advantages of the ULF System
• Once a phone is paired to the system it will be able to automatically connect to the
BluetoothTM wireless network of the vehicle, the next time it is introduced into the
vehicle and the vehicle ignition is on.
• Up to four different BluetoothTM phones can be paired to the system at one time,
although only one phone can be wirelessly connected at any time.
• The phone does not need to be inserted into a phone specific cradle in order to be
integrated into the vehicle.
• The phone can remain in a briefcase, purse, glove box, etc.; as long as it is turned on
and located within the interior of the vehicle.
• The MFL buttons on the steering wheel can be utilized to place or receive a call, to
scroll the phone book and select a number or activate voice recognition in order to
dial a number via voice command.
4
BluetoothTM

• A voice recognition system is integrated into the ULF control module and can be
activated by depressing the send/receive button.
• The communications protocol of BluetoothTM wireless technology is standardized
irrespective of the manufacturer, this therefore allows various mobile telephones that
utilize BluetoothTM wireless technology and a recognized profile to be connected to
the ULF System.
System Overview
A ULF system consists of a control module, microphone, BluetoothTM antenna, a stand-
alone pairing (send/receive) button, or eject box with a coin tray insert.
ULF Control Module
The ULF module forms the interface between the BluetoothTM mobile phone and the
electronic system in the vehicle. The mobile phone with the embedded BluetoothTM
wireless technology is the transceiver, this requires that the phone be activated, paired
and present within the vehicle network in order to place or receive a call in the vehicle.
5
BluetoothTM
ULF System Overview

Oddment Tray
The oddment tray, which is connected to the
ULF control module via the vehicles wiring har-
ness, serves the purpose of:
Housing the send/receive or pairing
button, which must be depressed to activate
the pairing procedure between the phone and
the control module.
Pairing Button
A stand-alone send/receive or pairing
button is supplied for the 3 Series in order to
retain the cup holders. The button provides the
same function as the send/receive but-
ton on the steering wheel, plus is the button
that must be depressed to activate the pairing
procedure between the phone and the control
module.
BluetoothTM Antenna
The BluetoothTM antenna operates on a frequency of 2.45 GHZ and is installed in the
interior compartment of the vehicle. This antenna provides the wireless interface
between the BluetoothTM enabled phone and the ULF Control Module.
System Operation
Initial Operation
Prior to using the system for the first time, the BluetoothTM mobile phone that is to be
used must be paired with the ULF control module. This pairing procedure is necessary
in order to assign the digital code of the mobile phone to the ULF control module
installed in the vehicle. The pairing procedure is only required when a new phone is
introduced to the ULF system for the very first time or the list of paired devices is cleared
form the memory of the ULF module, it does not need to be performed every time the
phone is used with the system.
After pairing, the mobile phone is recognized automatically by the ULF control module
within 45 seconds after it is introduced into the vehicle and the ignition is turned on.
6
BluetoothTM

Note: Depending on the mobile phone manufacturer, particular care must be
taken prior to initial operation to ensure that no headset is coupled with the
mobile phone. Various devices may interpret the ULF control module as a
headset and request deactivation of the headset. Please refer to the operating
instructions of the mobile phone for detailed information.
Pairing Procedure
The pairing procedure that must be initiated through the phone will differ corresponding
to the different menu configurations of the various BluetoothTM mobile phones on the
market. The user's manual of the phone manufacturer should always be referenced for
specific steps on how to activate the BluetoothTM feature and to pair/link devices.
The following steps are generalized steps that should help in activating the BluetoothTM
function of most phones:
IN VEHICLE:
1. Depress the send /receive (pairing) button located in the center console, for at
least 1 second prior to switching on the ignition and continue to hold the button
down for approximately 2-3 seconds after the ignition is turned on.
2. Release the button.
Note: The send/receive (pairing) button in 5 Series and X5 SAV is
located on the oddment tray assembly in the center console.
7
BluetoothTM

3. Shortly after releasing the button on the
Radio or Display Screen, the following
message should be displayed:
a. Display Screen:
"Bluetooth Pairing" displayed.
Green, Yellow and Red LEDs on the right
side of the unit are flashing which indi-
cates that the ULF is waiting for a signal
from the BluetoothTM device to be paired.
b. Radio Display (5 Series and X5 SAV)
"Bluetooth Pairing" display which indi-
cates that the ULF is searching for
available BluetoothTM devices.
Green, Yellow and Red LEDs on the right
side of the unit are flashing which indi-
cates that the ULF is waiting for a signal
from the BluetoothTM device to be
paired.
c. Radio Display (3 Series with CD
or Cassette)
"BT Pairing" display which indicates
that the ULF is searching for available
BluetoothTM devices.
4. Activate the search function of the
phone as indicated below.
ON PHONE:
1. Locate the connection/settings menu and select BluetoothTM.
2. Select the response that will activate the BluetoothTM feature of the phone.
3. Next select a menu option that will allow you to "Discover" or "Search" for active
BluetoothTM devices.
4. If the phone identifies/finds a device (named "BMW" followed by 5 digits) select it
and follow the indicated steps to complete the pairing process.
5. Once the phone is successfully paired to the device cycle the vehicle ignition
switch off and back on and the devices should wirelessly connect within 30
seconds. When the connection is established the phone will display a connection
symbol.
8
BluetoothTM

The following steps are an example of the pairing procedure that must be initi-
ated to pair the Sony Ericsson T68i phone to the ULF Control Module.
1. Press the menu button.
2. Select "Connect".
3. Select option 3: "Bluetooth".
4. Select option 4: "Options".
5. Select option 1: "Operation mode" and set to "On" or "Automatic".
6. Go back one step by pressing the red phone button several times.
7. Select option 3: "Discover".
8. Mobile phone display shows 'Searching'
9. Select "BMW ……" in upcoming list.
10. Select option 1: "Add to paired".
11. Enter the password (= ULF passkey) located on ULF Control Module that
is in the rear of the vehicle or on the Passkey Reference Card.
• Mobile phone display shows 'BMW …… Pairing'
• Mobile phone display shows 'Pairing Successful'
• Display screen shows 'Pairing succeeded' for 3 seconds
12. Enter device name or accept the name that is automatically displayed.
13. Mobile phone display shows "Added to paired devices".
14. Exit menu by pressing the red phone/NO button.
15. Once the phone is successfully paired to the device cycle the ignition switch off
and back on.
16. The devices should wirelessly connect within 30 seconds. The connection is
established when the phone displays the symbols indicated, on the right side of
the screen.
Note: Shortly after turning on the ignition and the
BluetoothTM connection is identified, the phone may dis-
play a message asking if the connection should be estab-
lished/accepted. The connection authorization request
will always occur unless the setting on the phone is modi-
fied to allow automatic connection every time, please refer
to the user's manual of the phone to determine how to
change this setting.
9
BluetoothTM

System Functions
The mobile phone must always be activated, paired and present within the BluetoothTM
network in order to place or receive a call through the vehicle.
Indicator Lamps
The indicator lamps show the following:
Active call (green light)
No mobile phone in range
(steady red light)
No network (flashing red light)
Adopting Telephone Book
Depending on the type of BluetoothTM mobile phone, the telephone book is either trans-
ferred automatically (ex. Nokia 6310, Sony Ericsson T68i) or manually (depending on
software version of phone) by the user to the ULF control module. The address book is
stored temporarily for the purpose of accessing/displaying stored phonebook information
using the steering wheel controls or telephone menu selections available on the display
screen or some radio displays.
If a manual transfer of the address book must be made, the ULF must be in setup mode
for manual transfer. The corresponding data can then be transferred. If phonebook data is
modified while the phone is wirelessly connected to the vehicle the changes will not be
displayed in the vehicle if the phonebook is scrolled via the steering wheel or display
screen, changes will only be transferred the next time the ignition is cycled.
Placing a Call
A call can be placed in several different ways:
1. Using the keypad or address book of the mobile phone and depressing the send
button on the phone.
Note: Some phones may ask if the call is to remain within the phone. Refer to
the users manual of the phone for specific instructions on disabling this fea-
ture.
2. Depressing the R/T button on the steering wheel, then scrolling (using the or 
buttons) through the address book of the phone that is linked to the ULF, until the
desired number is displayed on the radio or display screen and then depressing
the send/receive button on the steering wheel or center console to place
the call.
10
BluetoothTM

3. Depressing the button on the steering wheel until an audible "beep" is
heard through the vehicle speakers, at this point a call can be placed by using the
following voice commands:
• "Dial number" or "Dial phone"
• After the system asks for a number say the number.
Example: "123 456 7890"; the system will repeat the number requested
once you stop speaking momentarily, the number may also be displayed
depending on the vehicle and equipment/accessories installed.
• "Dial"
Note: Once the dial command is given the number will be displayed on the dis
play screen or radio; plus it will always be displayed on the mobile phone
after a call is placed.
4. Briefly depressing the button on the steering wheel will redial the last
number dialed.
For more information on using voice commands refer to the "Owner's Manual for Voice
Input System. The Convenient Alternative to Manual Control" (P/N 84 11 027 942)
Receiving/Accepting a Call
The call ringer in the BluetoothTM mobile phone is audible when an incoming call signal is
received. At the same time, the signal is sent via the BluetoothTM interface in the mobile
phone to the BluetoothTM antenna in the vehicle. The ULF receives the incoming ring/call
signal via the BluetoothTM antenna and mutes the radio. The incoming ring/tone signal is
then also transmitted to the vehicle speakers.
The following options are available for accepting a call:
3 Series without Display Screen:
• Press send/receive button on MFL (Steering Wheel)
• Press send/receive button in the center console
• Press send/receive key on mobile phone
5 Series and X5 SAV without Display Screen:
• Press send/receive button on MFL (Steering Wheel)
• Press send/receive key on radio
• Press send/receive button on the oddment tray (Center Console)
• Press send/receive key on mobile phone
11
BluetoothTM

Vehicles with Display Screen:
• Press send/receive button on MFL (Steering Wheel)
• Press send/receive button on the oddment tray (Center Console)
• Select the green phone symbol on the Display Screen
• Press send/receive key on mobile phone
Conducting a Call
If the call is accepted by pressing the send/receive key on the Radio (5 series and
X5 SAV), Display Screen, steering wheel or center console, it will be conducted via the
hands free microphone and vehicle speakers.
If a call is accepted by pressing the send/receive key on the mobile phone, the reaction
will depend on the type of handset. In the majority of cases, however, the question
appears:
"Do you wish to use the mobile phone?"
Please refer to the operating instructions of the mobile phone for a detailed description of
the operating procedure of the phone.
The hands-free function is activated after pressing the send/receive key. The incoming
call is encoded (scrambled) via the BluetoothTM interface in the mobile phone and sent to
the BluetoothTM antenna in the vehicle. The call is received by the ULF control module
and output via the radio to the audio speakers.
Since the ULF system provides a digital full-duplex hands-free operation, it is possible to
simultaneously speak and listen to calls. An echo cancellation function prevents feedback
when speaking into the microphone. The microphone audio signal is sent via a hardwire
connection to the ULF control module. In the ULF module the received audio signal is
scrambled via the BluetoothTM module and transferred via the BluetoothTM antenna to the
mobile phone. The mobile phone then transmits the call via the phone antenna.
12
BluetoothTM

Ending a Call
The following options are available for ending a call:
3 Series without Display Screen:
• Press send/receive button on MFL (Steering Wheel)
• Press send/receive button in the center console
• Press send/receive key on mobile phone
5 Series and X5 SAV without Display Screen:
• Press send/receive button on MFL (Steering Wheel)
• Press send/receive key on radio
• Press send/receive button on the oddment tray (Center Console)
• Press send/receive key on mobile phone
Vehicles with Display Screen:
• Press send/receive button on MFL (Steering Wheel)
• Press send/receive button on the oddment tray (Center Console)
• Select the green phone symbol on the Display Screen
• Press send/receive key on mobile phone
Transfer Active Call From Phone to ULF
If a call is received or placed via the handset, it can be transferred into the vehicle once
the phone is within the active BluetoothTM network of the vehicle.
Call transfer procedure:
1. Ignition must be on.
2. BluetoothTM connection must be established.
3. Briefly depress the send/receive button located in the center console.
13
BluetoothTM

NOTE: Some phones may automatically display a statement asking the user
if the active call should be transferred to the ULF system shortly after the
BluetoothTM connection is established. If the request is acknowledged the
call is automatically transferred into the vehicle/ULF system without having to
depress the send/receive button
Transfer Active Call from ULF to Phone
If you are currently in an active call and you need to leave the vehicle the call can be
transferred into the handset in several ways.
1. Ignition is turned off and you walk away from the vehicle. Once outside the 10 m
(32.8 ft) range a message may be displayed on the phone asking if the current call
should be maintained or ended, by maintaining the call it will be transferred to the
handset.
2. Depending on the model of phone being used the call can be transferred to the
handset by manually disconnecting from the BluetoothTM network via the connec-
tions menu or selecting a transfer function in the settings menu of the phone (refer
to the user's manual of the phone for more information).
Linking Several BluetoothTM Mobile Phones
Up to four BluetoothTM mobile phones can be paired one after the other to the ULF con-
trol module. The pairing operation corresponds to the procedure described above.
The handset paired last has the highest priority. The telephone paired first will drop out
of the list if a fifth BluetoothTM mobile phone is paired.
Note: For incoming and outgoing calls, only the user connected first to the system can
speak via the hands-free facility.
If two users enter the network or connection range simultaneously, only the user with the
highest priority (the user last paired during the initial pairing procedure) will be able to use
the hands-free function for incoming & outgoing calls. If the highest priority phone is
turned off the phone with the next highest priority will be connected.
Deleting Devices
The paired BluetoothTM mobile phones can only be deleted as a single group from the
ULF control module.
The pairing procedure must first be activated, and then the send/receive button
on the installed eject-box or the pairing button located at the rear of the center console
must again be depressed for an additional 10 seconds after the "Bluetooth Pairing" mes-
sage is displayed on the radio in order to clear the list of paired devices from the control
module and the message "paired devices deleted" is displayed.
14
BluetoothTM

Technical Information
Not only does the Universal BluetoothTM Hands-Free System offer a means to wirelessly
integrate a mobile phone into the vehicle, it also can be diagnosed using the DISplus or
GT1.
The control module should always be coded to the specific vehicle that it is installed into
to ensure optimum system performance. Coding of the module can be done using the
DISplus or GT1 with CD33 or higher installed.
The ULF control module contains several controllers that provide the following functions:
1. BluetoothTM Control Circuit
The BluetoothTM control circuit is physically connected to the BluetoothTM antenna.
It establishes the connection between the BluetoothTM mobile phone and the
vehicle, de-scrambles the incoming call/signal from the phone, scrambles the
outgoing signal from the microphone for transmission to the phone, plus controls
all communication to paired BluetoothTM devices.
2. Hands-free Control Circuit
The hands-free control circuit in the ULF controls the input/output of audio
frequency signals in hands-free mode. The hands-free mode is designed for
full-duplex transmission. This means the user can listen and speak
simultaneously. Voice transmission takes place via a microphone located in the
interior of the vehicle.
Pressing and holding the send/receive button until an audible beep is
heard will activate the integrated voice recognition system and place the system
into a hands-free mode.
3. Audio Output Control
The incoming signal from the BluetoothTM phone is processed, sent through the
radio and to the speakers.
4. Audio Input Control
The outgoing audio received from the vehicle microphone is processed and
transmitted to the BluetoothTM phone.
5. I/K-Bus Interface
The interface in the ULF control module for the I/K-bus controls the procedure for
transmitting and receiving data telegrams via the I/K-bus in connection with other
components on the bus.
15
BluetoothTM

6. Power Module
The power module in the ULF control module regulates the voltage supply and
monitors system shutdown in the event of an under voltage situation in the vehicle.
System Overview
Voice Recognition
The voice recognition for the this system is integrated into the ULF Control Module and
utilizes the same voice commands as those used with the TEMIC Voice Recognition
Module used with the CPT8000 phone system. The "Owner's Manual for the Voice
Input System" P/N 84 11 0 027 942 should be referenced for more detailed information
regarding voice command features.
Coding ULF Control Module to Vehicle
After installing the ULF Kit, the vehicle should be re-coded with DISPlus/GT1 SW 33 or
higher, using the "Retrofit" path to ensure that the system works properly with the sys-
tems currently installed in the vehicle. The recoding is done automatically when using
the following "retrofit" procedure:
Example for coding E46 with ULF installed:
• Connect DIS or GT1 to vehicle (with SW 33 or higher installed).
• Turn on ignition
16
BluetoothTM

• Select "Coding ZCS"
• Series: "E46 Series"
• Path: "2 Retrofit"
• System: "ULF Universal charging and Handsfree facility".
• Follow the on screen requests to activate the coding procedure.
Function Test
Upon completion of the recoding, verify that the BMW Universal BluetoothTM Hands-
Free System is working correctly by going through the following action steps. After com-
pleting each step ensure that the desired result is obtained:
17
BluetoothTM
Action Response
Pair phone to vehicle (refer to section for
pairing instructions).
Phone and or Radio/MID/Board Computer
should display statement indicating Pairing
succeeded.
Turn on radio and initiate a call using voice
recognition commands by
depressing/holding the Voice recognition
button on steering wheel until an audible
beep is heard
Radio should mute and an audible beep is
heard through vehicle speakers.
Say "Dial number" System states "Please speak the number"
Say phone number to be dialed
ex"1234567890"
System states "1234567890"
If number is correct say "Dial"
Call is placed and number being dialed is
displayed on phone as well as on
Radio/MID/Board Computer.

Troubleshooting
18
BluetoothTM
Situation Correction
No audio output through vehicle speakers Check SES module jumper plug
Radio does not mute after placing a call Check connections at rear of radio for Tel On and Tel Mute
signal. Verify that connectors and pins are properly seated.
Audio quality in vehicle may not sound very
good
Recode ULF Control Module.· NOTE: Audio quality in
vehicle or at person being contacted, is dependent on the
quality and signal strength of the wireless service provider in
the area traveled.
Customer complains that the person being
contacted hears a "Buzzing" noise, at times
during their conversation or on voice mail
message that he/she has left.
Intermittently a "Buzzing" noise is noticeable to the person
being called from the vehicle. The "Buzzing" noise is a
result of the GSM signal being feedback through the micro-
phone, this usually occurs if the GSM phone is located too
close to the microphone. The customer should change the
location of where the phone is placed/stored.
Driver is told that the person being contact-
ed complains that there is an echo/reverber-
ation in the audio; person can hear his/her
voice back through the phone.
Audio volume in vehicle during a call may be a bit to loud,
causing the other person to hear his/her voice coming back
through the phone.
A second call is received while in a call, and
call cannot be accepted using MFL con-
trols.
Use handset to expect second call and place previous called
on hold. Call waiting is functional only via the handset.
The radio audio does not come back imme-
diately if the "other" person hangs up first.
It takes approximately 15 seconds for the ULF system to
recognize that the call was terminated from outside the
vehicle.If the call is terminated from outside the vehicle first,
the driver can depress the button on the steering wheel to
terminate the call from the vehicle and un-mute the radio
quicker.
Customer is not able to pair phone to sys-
tem, not able to locate ULF passkey/pass-
word reference card.
The "BluetoothTM Passkey" is identified on the label of the
ULF Control Module located in the rear of the vehicle.·
The "BluetoothTM Passkey" for the installed control module
can be obtained by connecting the DISPlus or GT1and
accessing the diagnostics for the ULF system:- select
"Diagnostic requests"- select "Bluetooth code"
Intermittently a popping noise is audible
through the vehicles speaker and there is
no BluetoothTM wireless communication
established between the ULF module and
the phone.
Vehicle and /or ULF Control Module are not correctly
coded.· Recode module and vehicle (refer to Coding ULF
Control Module to Vehicle)
E46 Only:After installation of ULF system
the speedometer and odometer do not
work.
Remove pin 7 & 8 from the 54-pin connector going to the
ULF Control Module. Refer to the E46 installation instruc-
tions.

Connector Pin Assignments
The 54-pin connector of the ULF Control Module utilizes the following pins on X01185
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
19
BluetoothTM
PIN Description
1Microphone +
11 Cradle On/Enable
15 I-Bus
17 KL 30
19 Microphone -
21 Microphone Shield
22 Hook
27 Programming
28 Programming
32 Cradle Key +
33 Telephone On
34 Telephone On (pin 33)
35 KL R (Ignition)
36 KL 31 (Ground)
43 Programming
44 Programming
45 Programming
51 Telephone Mute
52 KL 58g (illumination)

20
BluetoothTM
Speaker
Te l +
Te l -
Te l ephone Mute
Te l ephone On
X10018
2113
Cradle Key +
Cradle On
Bluetooth
Antenna
I/K Bus
to other modules
from terminal 30 from K3
unloader relay
3
Light
Switch
input
F74
10A
X01185
X01185
Microphone
132
Microphone +
Microphone -
Microphone Shield
X18507
output
to
speaker
F72
X13649
SES
Jumper
Plug
X01041
ULF Wiring Schematic for the E53
with Boardmonitor
ULF Control Module
Radio Control Module
Eject Box
15 16101112
6
12
11
32
35
17
15513338371192136
26 25 23
1812
13
98
10 11
+5V
X13016
X2759
21
3
K3 Unloader relay terminal R
X9987
X9988
30
X01041
Ground Distribution
Schematic information
obtained / developed using
schematics from DIS v 32.0
I/K Bus
X57
X10390
X10390
Boardmonitor
X13649
X18801
T
APEL-
T
APEL+
T
APER-
T
APER+
2 4
18
9310
7
6
X13646
9
to other modules
X13646
X13646
from terminal 30
F75
7 1
Light
Switch
input
X13016
X18801
2
X4545
X4545
5
from terminal 30
F74