In principle, the structure of the car communication computer corresponds to that of a personal computer. In the same way as a personal computer, the car communication computer contains a processor as well as RAM modules and other peripheral components. Certain functions such as the voice input control system are integrated in the form of software in the car communication computer.
The car communication computer is the central control module for all applications. It is always coupled with the 8.8" split-screen central information display. The car communication computer also features the high variant of the controller with haptic feedback.
The car communication computer is based on a modular design, i.e. the main systems of the communication network are integrated in the form of modules in the car communication computer. It can be configured and expanded corresponding to requirements. At the time of market launch, the following modules/functions will be integrated in the car communication computer
Scheme 1
- Radio double tuner
- DVD navigation system, Professional (map presentation)
- Voice control system
- ASK functions
- MOST-CAN gateway functions
The following advantages are achieved by combining several control units in one module
- Increased functionality by combining several systems
- Easy to expand/upgrade by means of software with corresponding interfaces
- Fewer plug connections therefore fewer potential fault sources
- Reduced package space for control units
Scheme 2
Scheme 3
Scheme 4
The service concept is such that individual modules and parts of the car communication computer can be replaced in the event of malfunction, thus serving to reduce repair costs. A differentiation is made between electronic and mechanical parts.
Electronic Parts
Replacement of the following electronic parts is planned
| CD drive | DVD drive | Tuner module | HIP module |
|---|---|---|---|
| Gyro | Front panel | Audio board | Memory module |
| PMC cards | Electric fan |
ELECTRONIC PARTS REPLACEMENT CHART
Mechanical Parts
Following mechanical parts are available
| Top cover | Bottom cover | DVD drive retaining fixture |
|---|---|---|
| CD retaining fixture | DVD drive holder | CD drive holder |
| Cover PMC slot | Cover PCMCIA slot | Rubber mount for electric fan |
MECHANICAL PARTS SPECIFICATION
Particular attention must be paid to electrostatic discharge ESD when working on the car communication computer. Disregard of the safety requirements may result in damage to the electronic components in the car communication computer.
Preparatory Work
The following points must be observed when working on electronic components of the car communication computer corresponding to the service concept
- All work must be carried out on a conductive and earthed workbench.
- The special tool 12 7 192 is additionally used for this purpose.
- The earthing cable must be connected to a secure and reliable earthing point (water pipe, heating pipe, socket outlet earth). Before taking the parts out of their packaging, the person working on the components must first put on the wrist cuff in order to discharge himself. The electronic components are placed on the antistatic mat and also connected with the earthing cable.
Replacement
The electronic components must be replaced as described in the repair instructions and following the procedure described on SIP Electrostatic Fundamentals, while observing ESD safety measures.
Scheme 5
Note. The Antistatic Mat at your Center may look different than the one shown here or at the training center. Remember the following when using the Antistatic Mat: Ground the Antistatic Mat to the workbench using the attached lead Attach the Grounding strap to the component being serviced Always wear the wrist cuff.
Scheme 6
System Functions
The car communication computer comprises the following functions
- Radio
- DVD navigation, Professional (map presentation)
- Voice control system
- Online platform
- Audio management
- ASK functions
- Driver for central information display
- MOST CAN gateway
Voice Control System
A voice control system High is integrated in the car communication computer. With this system, all functions shown in the CID can be controlled by voice commands. This system has the advantage that the hands need not be taken off the steering wheel while driving in order to change settings.
The SES can be used to control the following systems
- Entertainment
- Communication
- Navigation
- Climate
- "5th Menu" setting
The voice control system makes use of specific voice commands. The voice control system sets up a dialogue with the user. Repeat requests are issued if the system did not understand a command.
System Integration
The voice control system is loaded as pure software in the car communication computer. The voice control system makes use of the memories and processors in the car communication computers as well as the hardware of other systems (e.g. microphones).
The two hands-free microphones in the front roof console are used in connection with the voice control system. The hands-free microphones are connected directly to the telematics control unit (TCU). The TCU sends the microphone signals via MOST to the car communication computer where they are processed in the DSP in order to execute the required functions.
System Start/End
The voice control system is activated/deactivated via the push-to-talk button (PTT) on the multifunction steering wheel or on the controller. For the first time, the PTT button on the controller makes it possible for the passenger to use the voice control system (SES). The SES is activated for the driver by briefly pressing the button and for the passenger by pressing and holding the button longer.
The SES is deactivated by again pressing one of the PTT buttons. Activation of the SES is indicated by a graphic display (PTT logo) in the status line of the CID. The system is active for about 5 seconds. If no input takes place during this period of time, the user is informed that no voice input was detected and the request for voice input is repeated. The voice control system is deactivated if again no input is made within 5 seconds.
