With a telematics function, a telephone link is established from a vehicle to a Service Center. In this way, it is possible on the one hand to make use of the services offered by the Service Center and on the other to place emergency calls. The Service Center obtains from specialist suppliers various information, e.g. traffic information, and forwards this information to the vehicle linked up to it. In the event of an emergency call, all the necessary measures are taken by the Service Center. Information and other services, such as breakdown recovery service, can also be provided by BMW through the Service Center.
The emergency call button with indicator lamp is located in the middle of the roof liner above the windshield. An emergency call can be initiated manually by operating the emergency call button. The emergency call button is diagnostic-compatible. The telephone interface can detect whether the emergency call button is connected. If a fault occurs, a fault is stored in the fault memory. In addition, a message can be shown in the control display or output in the form of a voice output.
Control display: Apart from a few exceptions, the control display incorporates the controls and displays for the vehicle electronics. The control display coordinates the function requests from the system and assigns them to the relevant functions.
If the Navigation option is fitted, the control display indicates that an emergency call has been initiated. The current vehicle position is displayed and an acknowledgment message output if the emergency call connection has been established.
Controller: The control display is operated by means of the controller located on the front center armrest.
The GSM antenna (Global System for Mobile Communication) for telephone and GPS navigation is located on the rear roof edge of the vehicle.
The telephone module (transmit/receive unit) is connected to the MOST network for integrating the telephone in the communications network. In the telephone module, the analog signals of the microphone are digitized and forwarded via the MOST connection to the voice processing system.
The audio system controller (ASK) is a control module in the MOST network. The ASK is the system master. The ASK is responsible for managing all audio signals.
The light module controls and monitors the vehicle lights. Information is received and sent via the K-CAN SYSTEM data bus. If an emergency call is made, the light module switches on the inside lights and the hazard warning system.
The navigation system provides information on the current vehicle position, the direction of travel and the speed. The navigation computer is a node in the MOST network.
If the Navigation option is fitted, the data of the current vehicle position are automatically transmitted with the emergency call telegram when an emergency call is made.
The CAS is the central electronic operating and control element in the vehicle. The CAS comprises all the functions that relate to access to the vehicle. These are essentially the functions of terminal control and electronic immobilizer (radio key evaluation, central locking control, power window control).
If an emergency call is automatically initiated, the central locking is unlocked by the CAS in order to facilitate the rescue operations.
The MOST (Media Oriented Systems Transport) bus links the audio, video and navigation systems. Information relating to function requests is transmitted to the relevant control modules by means of MOST bus messages.
The K-CAN SYSTEM data bus is the data connection between the instrument cluster and the control modules in the chassis and suspension, drive and body sections. Information is exchanged with data telegrams.
The BYTEFLIGHT is a bus with optical wave guide. This bus is the data link between SIM and ZGM. Information is exchanged with data telegrams.
The central gateway module connects the BYTEFLIGHT, K-CAN SYSTEM, PT-CAN data buses and the DIAGNOSTIC BUS.
The SIM Safety Information Module is a control module. The SIM is also the bus master of the BYTEFLIGHT bus. The SIM operates as a star connector and has a connection for an optical wave guide for each ISIS satellite and the ZGM. In the event of a crash, the SIM supplies a power reserve for the entire safety system if the system voltage should fail. Thus the function of among others the emergency call system is retained in the event of a crash.
ISIS is a bus system based on optical wave guide technology. The ISIS system controls the safety functions such as the emergency call function.
To use the telematics functions, the telephone, telephone interface and antenna system must be ready for operation and supplied with sufficient power.
An emergency call over the telephone is automatically initiated if a crash is detected by a satellite (triggering of an airbag) and signaled to the SIM. If an appropriate crash severity has been established by the SIM, the information for initiating the emergency call is sent from the SIM over a serial line to the telephone module.
The telephone module selects a Service Center and places the emergency call as a SMS message (Short Message Service). A voice link to the Service Center is also set up.
Two numbers are designated for both emergency call functions; these are dialed alternately until a connection is established. If no connection has been established after 60 seconds, the telephone dials the emergency number in accordance with the GSM standard (Global Standard for Mobile Telephone). Forexample in Germany, the telephone number 112 is dialed.
If the existing serial single-wired connection between SIM and telephone is disturbed or interrupted, the entire bus system is used to initiate an emergency call. The telegram is sent from the SIM via BYTEFLIGHT to the ZGM and via the K-CAN bus to the control display. The telegram is carried from the control display on the MOST bus to the telephone (ECE version).
Once an emergency call has been initiated, it cannot be canceled.
The Service Center acknowledges receipt of an emergency call by means of an SMS check back signal. This acknowledgment is indicated in the control display and stored in the system.
For extra assurance, the Service Center acknowledges the emergency call verbally over the telephone link. If no telephone link is established, or the vehicle occupants are not in a position to answer, the rescue measures are instigated automatically. The rescue measures instigated are indicated in the control display.
An emergency call is initiated manually by pressing the emergency call button (panic button). The emergency call button is used in an emergency or dangerous situation, e.g. in the event of danger to life through injury or illness, or in the event of attack etc. Manual emergency call initiation must be selected in such situations because the lack of a crash signal will fail to effect automatic emergency call initiation.
The telephone module is activated by pressing the emergency call button. The subsequent sequence develops in the same way as with automatic emergency call initiation.
A green LED in the emergency call button lights up to indicate manual emergency call initiation. The current vehicle position is indicated in the control display. The display also features a note to the effect that the emergency call has been placed.
The green LED in the emergency call button flashes when verbal confirmation is received from the Service Center that the emergency call has been received.
A breakdown call can be initiated if the vehicle can no longer be driven because of a fault or if parts governing its function have malfunctioned.
The breakdown call is activated manually by way of a menu item in the control display. The following information is communicated:
Dynamic route planning: Route planning is updated continuously as a result of the following being taken into consideration:
Display of additional information: When requested, additional traffic-related online data and the new route are displayed. This is information on:
In the Japan-specific version, a Flexible Bus Interface (FBI) is connected to the MOST bus. The FBI is connected to the telephone via a serial link. When a ”Send emergency call” telegram arrives over this line, the Japan telephone establishes an emergency call voice link to the police. An emergency call voice link is also established if the MOST bus is interrupted.
When working on the roof liner and the button for the sunroof, do not inadvertently press the emergency call button.