OK this is what i have, I really got confused when i saw the antenna (part number 8540 8387422) ontop of my nav drive, i thought it was bluetooth but not sure now. Also, should there be two antennas? I could see two antenna cable plugged into the bottom of the siemens unit.

Now how do i find the correct one in WDS? And more importantly, if i buy a TCU, how will i know which wires go to which pins if i cant check the pin configuration of the car the TCU came from?

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BIT 2 with CKPH (GSM and WDCT networks)

The Siemens CKPH (cordless keypad handset) is connected via a WDCT antenna to the BIT 2. Data communication with the vehicle electrical system takes place via the I/K-bus interface. This enables operation via the on-board monitor, MID and multifunction steering wheel. Hands-free operation is effected by means of a microphone and the existing audio system, radio, DSP or double-coil speakers. Other audio sources are deactivated by the control unit during hands-free operation.

Reception and relaying of SMS messages is possible. These text displays can be read off in the CKPH1 and CKPH2 and in the on-board monitor and MID. A personal telephone directory can be stored on the SIM card.

Long-distance data or fax transmissions can also be effected with a separate connection.

Brief description of components
The Siemens telephone with CKPH (fixed mounting) consists of the following components:

•CKPH (cordless keypad handset)

•Eject box with card reader

•Basic Interface Telephone

•Hands-free microphone

•Double-coil speakers

•Antennas

CKPH (cordless keypad handset)
The cordless keypad handset replaces the handset previously supplied with a coiled cable. The cable connection to the eject box is omitted. Communication is conducted by radio and enables more freedom of movement. Calls can thus also be made and received in closer proximity to the vehicle (approx. 10 m).

The eject box is the basic and reception station for the CKPH. In the case of the tandem system option, the second CKPH is accommodated in a second eject box in the centre armrest at the rear. The handset can be stowed with the keypad facing upwards or downwards.

Data is transmitted between CKPH and BIT 2 via a WDCT antenna (Worldwide Digital Cordless Telephone antenna (2.46 GHz).

The cordless keypad handset is supplied by a storage battery. The battery is recharged by integrated charging electronics when its capacity drops below 1/3. However, the CKPH must be engaged in the eject box for this purpose. Charging starts only when terminal R is activated.

Important: A charging procedure lasting approx. 10 hours is initiated when the storage-battery compartment is opened. This formatting procedure results in an increased closed-circuit current.

Caution: Do not charge storage batteries externally!!

Eject box with card reader
The eject box serves to accommodate the telephone handset. It contains a voltage regulator and an SIM card reader and is located in the centre armrest.

The ISM band (Industrial Science Medical 2.46 GHz) is not authorised in all countries. WDCT operation can be deactivated and activated with a switch in the eject box. With one switch-off operation, the BIT2 control unit and the SBDH on the ISM band are deactivated (the WDCT switch is at ”0”).

With the WDCT switch at ”0”, the radio link to SBDH is not set up when terminal R is switched on again. The SBDH no longer functions. The telephone unit can only be used without the handset.

The power supply is provided by terminals 30 (+6V) and 31. Terminal 58g supplies the signal for illuminating the CKPH.

Basic Interface Telephone 2
The BIT 2 control unit contains the following components:

•I/K-bus interface

•Motor-vehicle interface (audio)

•Microprocessor, program and data memories

•GSM module

•WDCT basic station

•Voltage supply

Data communication with the vehicle electrical system is facilitated by the I/K-bus interface. It is thus possible to operate the phone using the multifunction steering wheel, on-board monitor or MID.

The WDCT basic station has a transmitter power of max. 10 mW and establishes the connection to the CKPH via the WDCT antenna. The transmitter power is modulated as required.

The BIT 2 control unit is located in the luggage compartment on the left.

If terminal R or 15 switches to ignition-lock position ”0”, the phone remains active for a certain run-on time. The run-on time (timer) can be set between 0 and 120 minutes in the phone menu on the handset (refer to Owner's Manual). 0 minutes is set as the standard value.

Hands-free microphone
Hands-free operation is effected by means of a microphone and the existing audio system, radio, DSP or double-coil speakers. Other audio sources are deactivated by the BIT 2 control unit during hands-free operation.

Communication is conducted in digital full-duplex transmission, i.e. NF is enabled for both call participants. It is possible to speak and listen simultaneously.

Double-coil speakers
Double-coil speakers are only fitted in conjunction with the hands-free facility. The audio coil is muted during an incoming/outgoing call. The second coil is used for conducting communication.

On cars without DSP , the BIT 2 control unit is connected directly to the double-coil speakers. On cars with DSP, the speakers are connected directly to the devices. The double-coil speakers are installed at front right and left.

Antennas
The BIT 2 control unit transmits and receives calls from the mobile-telephone network via the GSM antenna. The wideband antenna is designed for a frequency of 900 MHz and consists of two emitters.

Depending on the model, the GSM antenna is fitted at the following locations:

Model
Location

E38
Group antenna on outer skin of roof

E39
Window antenna

E39/2
Antenna on outer skin of roof

E46
Antenna on outer skin of roof

E46C
Antenna rod

E53
Antenna underneath rear spoiler




The WDCT antenna transmits the communication by radio to the CKPH. The installation location depends on the model and is set out as follows:

Model
Installation location

E38
underneath rear parcel shelf

E39
underneath rear parcel shelf

E39/2 (touring)
under left side trim panel

The antenna is the WDCT antenna (worldwide Dect)

[QUOTE=neiloakley;702894]Now how do i find the correct one in WDS?

It is printed in black and white on your phone module what it is. And looking in th WDS, there are only TWO matching options - and the only differences are with or without voice recognition.

So there you go. The phone type is non-ambiguous.

Again, look at the WDS. You will see there are only 2 x TCU entries. And the only difference is with or without voice recognition.

So once more the solution is very clear.

Refer to the WDS, and compare the wiring differences between TCU and your Siemens BIT-II phone.

Then simply change the BIT-II wiring to the TCU wiring.
The WDS tells the whole story.

Can you send me a screenshot of the TCU you are seeing in WDS? I dont even have a TCU yet so i'm unsure how you have found the correct one.


I do have voice reconitiong at the moment (I will use navcoder to disable VR on the TCU to avoid conflict)

Really simple.

When the list of phones is on the screen, you go through them until you see the one that says "TCU"

Honestly, it's as easy as looking up words in a dictionary!

You don't need a screenshot for that....

argh i think it's just clicked. The Wiring is not specific to the unit, but the car.

SO all TCU units need the pins in the same configuration, and it need to swap the wires in my car about to match the configuration required by the TCU

So my car currently has
Telephone (BM On-Board monitor with Fixed mounting, Siemens (cordless handset) with SES Language-input system up to 2002_3)


And I want to fit a TCU unit so i need to swap the wiring to match the following:
Telematcis control unit (TCU-Everest) (SES Language-input system with TCU Telematic Control Unit without USA_LHD)

Which TCU i get doesn't matter, as long as i have rewired my connect for a TCU moduel correct?

Well, thats the same isn't it?

The only difference in TCUs is whether they are ECE or US models.
ECE = Assist over GSM, and optional Bluetooth cordless handset in the car.
US = Assist over CDMA, and no optional Bluetooth cordless handset in the car.
But the wiring (power, ground, ibus, microphone, audio) is identical.

As I said earlier: "simply change the BIT-II wiring to the TCU wiring."

Of course, always refer to the right wiring diagram.
Do not read USA diagrams if you have a Non-US market car.

The WDS shows all, very clearly.

No - a TCU module in a x5 could have the power on pin 1 and ground on pin 2

a tcu module on an x3 could have ground on pin 1 and power on pin 2

If you are saying the wiring for TCU modules are identical then i understand what i need to do, and as long as i look at ECE diagram in WDS and rewire to match that, i can get any ECE TCU module and plug it straight in.

I'm now looking for one of these (sourced form here http://www.bimmerboard.com/members/p...artNumbers.pdf)

European GSM based TCUs - won't work in US

TELEMATICS CONTROL UNIT GSM Jan-05 84116946991
TELEMATICS CONTROL UNIT GSM Mar-05 84106965055
TELEMATICS CONTROL UNIT GSM Sep-05 84106964113
TELEMATICS CONTROL UNIT GSM Jul-06 84106963758
TELEMATICS CONTROL UNIT GSM Nov-06 84109129850
TELEMATICS CONTROL UNIT GSM Mar-07 84109127894
TELEMATICS CONTROL UNIT GSM 84116946011
TELEMATICS CONTROL UNIT RFMD GSM 84106978533
TELEMATICS CONTROL UNIT GSM Jul-06 84106963758

TELEMATICS CONTROL UNIT GSM Nov-06 84109129850

WDS shows very clearly:

X5 TCU = power term30 pin 17 & pin 18, power termR pin 35, ground pin 36 & 54

X3 TCU = power term30 pin 17 & pin 18, power termR pin 35, ground pin 36 & 54

You may care to note that the WDS contains all the info you need.....