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Home >> BMW >> 2008 >> Z4 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 292 (Communication Systems - Si Techniques - E60, E61, E63, E64, E87, E90) >> Basic fittings for mobile phone Business E60, E61, E63, E64, E87, E90 >> Brief description of components >> E60, E61, E63, E64, E87, E90: TCU: Telematics Control Unit

E60, E61, E63, E64, E87, E90: TCU: Telematics Control Unit

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2005 BMW 645Ci, 2005 BMW 545i, 2005 BMW 530i, 2005 BMW 525i, and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

Installation location 

> E90:  The illustration shows the location of various control units. The TCU is fitted to the luggage compartment floor. Other control units may be fitted, depending on the vehicle's equipment.

Fig 1: Locating Telematic Control Unit (E60, E61, E63, E64, E87, E90)
G00431703Courtesy of BMW OF NORTH AMERICA, INC.
TELEMATIC CONTROL UNIT (E60, E61, E63, E64, E87, E90) LEGEND

Key Explanation Key Explanation
1 Video module (VM, EURO only) 2 Line compensator for aerials
3 Satellite tuner (SDARS, US only) 4 Telematic Control Unit (TCU)
5 CD changer (CDC) 6 Radio amplifier (AMP)
(HiFi or TOP-HIFI amplifier)

> E60:  The TCU is located in the luggage compartment on the left-hand wheel arch.

> E61, E87:  The TCU is installed on the right-hand side of the vehicle in the luggage compartment floor.

Fig 2: Locating Telematic Control Unit (E61 And E87)
G00431704Courtesy of BMW OF NORTH AMERICA, INC.
LOCATING TELEMATIC CONTROL UNIT (E61 AND E87) LEGEND

Key Explanation Key Explanation
1 Emergency call battery (not fitted at present) 2 TCU control unit

> E63, E64:  The TCU is located on the left-hand side of the vehicle behind the rear seat backrest.

Construction  The TCU is of modular construction and is equipped with the following components:

Fig 3: Identifying Telematic Control Unit Construction
G00431705Courtesy of BMW OF NORTH AMERICA, INC.
TELEMATIC CONTROL UNIT CONSTRUCTION LEGEND

Key Explanation Key Explanation
1 54-pin multi-pin connector 2 MOST interface
3 Connection for bluetooth antenna 4 Aerial connection for GPS antenna
5 Aerial connection for emergency GSM antenna 6 Aerial connection for telephone aerial

Pin assignment, MOST interface 

PIN ASSIGNMENT, MOST INTERFACE

Key Explanation Key Explanation
1 Receiver 2 Transmitter
3 --- 4 ---

Pin assignment, 54-pin multi-pin connector 

PIN ASSIGNMENT, 54-PIN MULTI-PIN CONNECTOR

Pin Type Description
1 E Microphone 1, positive terminal
2 E Microphone 2, positive terminal
3 A Switch-on signal for battery charging
4 --- ---
5 --- ---
6 --- ---
7 --- ---
8 --- ---
9 --- ---
10 --- ---
11 --- ---
12 --- ---
13 --- ---
14 --- ---
15 E Crash message from MRS
16 V Terminal 30 emergency call battery (not fitted at present)
17 V Terminal 30g/terminal 30g-f power supply; due to load power supply is split between pins 17 and 18
18 V Terminal 30g/terminal 30g-f power supply
19 M Microphone 1 earth
20 M Microphone 2 earth
21 M Screening for microphone
22 --- ---
23 --- ---
24 E Signal from wheel speed sensor, front left
25 E Signal from wheel speed sensor, front right
26 --- ---
27 --- ---
28 --- ---
29 --- ---
30 --- ---
31 E Signal from emergency call button
32 --- ---
33 A MOST wake-up
34 --- ---
35 --- ---
36 M Terminal 31, earth
37 A Emergency loudspeaker, positive terminal
38 M Emergency loudspeaker, earth
39 --- ---
40 --- ---
41 --- ---
42 --- ---
43 --- ---
44 --- ---
45 --- ---
46 E Signal from transmit/receive button
47 --- ---
48 --- ---
49 A ---
50 A Emergency call LED signal
51 --- ---
52 --- ---
53 M Terminal 31 emergency call battery (not fitted at present)
54 M Terminal 31, earth
  A = Output
E = Input
E/A = Input and output
M = Earth
V = Supply
For current specifications regarding pin assignment, please refer to BMW diagnosis system

How it works 

The TCU is connected to the MOST bus via the 2-pin connector. The 54-pin connector provides the connections to the vehicle electrical system, the base plate with snap-in adapter and the components of the emergency call system.

The TCU provides the following functions:

TCU with telematic services and mobile telephone 

Signal path:

Fig 4: Identifying Signal Path
G00431706Courtesy of BMW OF NORTH AMERICA, INC.
SIGNAL PATH LEGEND

Key Explanation Key Explanation
1 Transmitter and receiver 2 GPS satellite
3 Emergency call button 4 Telematic services
5 Transmitter/receiver module (Network Access Device, NAD) 6 GPS receiver
7 Hands-free microphone 8 Emergency loudspeaker
9 Mobile phone 10 Compensator (retrofit if customer so wishes)
11 Telephone aerial 12 Emergency aerial
Crash Signal for automatic emergency call    
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