Component Description For Emergency Call System Control Unit - GF82.95-P-3212CEU
MODEL 204.0 with CODE (359) TELE AID emergency call system as of model year 2009/YoM 08
MODEL 204.3/9 with CODE (359) TELE AID emergency call system
Shown on model 204.0
Location
The emergency call system control unit is located behind the seats in the trunk.
Task
- Realization of vehicle-related services
- Regulation of priorities over integrated priority management
- Communication management between vehicle and service center
- Forwarding vehicle position and identification as well as other required data to the service center
- Audio management
- Display management
- Fault handling
- Receive signals
- Transmit signals
Realization of vehicle-related services
The emergency call system control unit enables the following vehicle-related services to be realized:
- Authorization ("provisioning")
- Manual or automatic emergency call
- MB-Info call
- Breakdown assistance
Notification in the event of anti-theft alarm ("Anti Theft Notification")
- Vehicle tracking
- Vehicle remote door unlock
- Vehicle remote door lock
- Transmission of navigation data
Regulation of priorities via integrated priority management
| Priority | Service |
|---|---|
| 1 | Automatic emergency call |
| 2 | Manual emergency call |
| 3 | Vehicle tracking and notification in the event of anti-theft alarm |
| 4 | Roadside assistance |
| 5 | MB Info |
| 6 | Authorization |
| 7 | Vehicle remote door unlock or vehicle remote door lock |
| 8 | Transmission of navigation data |
Communication management between vehicle and service center
- Communication management between the vehicle and Service Center over the integrated communication module and the mobile telephone network for the specific country as well as forwarding information to the customer when required
Forwarding vehicle position and identification as well as other required data to the service center
- Forwarding vehicle position and identification as well as other required data to the service center after activation by the following actions:
- Crash signal from supplemental restraint system control unit (N2/10), for automatic emergency call
- Actuation of emergency call system button (S93/3), for manual emergency call
- Actuation of MB-Info button (S93/6s1), for MB-Info call
- Actuation of breakdown assistance button (S93/6s2), for breakdown assistance
- Call to the Service Center and actuation of the trunk lid external operation switch (S88/8) (model 204.0/3) or liftgate external operation switch (S88/8) (model 204.9), for vehicle remote door unlock
- Call to Service Center and reporting of theft for vehicle tracking
- Notification in the event of anti-theft alarm
- Transmission of navigation data
- Authorization ("provisioning")
Audio management
- Output of audio signals via center instrument panel speaker (H4/27)
- Audio muting
Display management
- Management of displays on the Audio/COMAND display (A40/8), instrument cluster (A1), emergency call system button, MB-Info button and breakdown assistance button
Fault handling
After activation of circuit 15R, the emergency call system control unit performs a self-test (for approx. t = 3.5 s). If the self-test is successful, the emergency call system is then ready for operation. In the event of a fault, a fault message is displayed on the instrument cluster, depending on the fault type, and the two red light-emitting diodes (LED) in the emergency call system button are permanently actuated. Depending on the fault type, the fault is also stored in the emergency call system control unit's memory.
Receive signals
- Direct lines
- Controller Area Network (data bus/CAN bus) (CAN)
Direct lines
- Power supply over circuit 30 and circuit 31 over one direct line each
- Status signal for circuit 15R over a direct line
- Emergency call system button signal via a direct line
- MB-Info button signal via a direct line
- Breakdown assistance button signal via a direct line
- Crash signal from the supplemental restraint system control unit via a direct line
- Global Positioning System (GPS) signals from multifunction antenna, except code (512) COMAND APS incl. DVD changer
- Global Positioning System (GPS) signals from global positioning system antenna splitter (A2/5), with code (512) COMAND APS incl. DVD changer
- Mobile phone signals or data from the multifunction antenna (A28/11) via a coaxial cable, except code (389) Mobile phone preinstallation with universal interface, USA/Canada
- Mobile phone signals or data from the frequency switchover control unit (N96) via a coaxial cable, with code (389) Mobile phone preinstallation with universal interface, USA/Canada
- Mobile phone signals or data from emergency call system antenna (A2/52)
- Signal from hands-free system microphone (A67b1) over audio equipment via direct lines.
Controller Area Network (data bus/CAN bus) (CAN)
The emergency call system control unit is a diagnostic CAN subscriber. The emergency call system receives the following data via diagnosis CAN:
- Crash information from supplemental restraint system control unit (additional (redundant), including crash level)
Signals from the left front axle rpm sensor (L6/1) and the right front axle rpm sensor (L6/2) from the Electronic Stability Program control unit (N30/4)
Transmit signals
Direct lines
- Voice output through center instrument panel speaker via direct lines
- Actuation signal for LEDs in emergency call system button via a direct line
- Actuation signal for LED in MB-Info button switch via direct line
- Actuation signal for LED in breakdown assistance button via a direct line
- Audio muting (MUTE) over discrete line:
- Sound system amplifier control unit (N40/3), with code (810) Sound system
- Audio equipment, except code (810) Sound system
- Mobile phone signals or data from the multifunction antenna via a coaxial cable, except code (389) Mobile phone preinstallation with universal interface, USA/Canada
- Mobile phone signals or data from the frequency switchover control unit (N96) via a coaxial cable, with code (389) Mobile phone preinstallation with universal interface, USA/Canada
- Wake-up signal to the "audio unit"
- Mobile phone signals or data to the emergency call system antenna
Design
Integrated communication module
- Integrated locating module
- Integrated GPS receiver for position finding (Date, time, history and last known location) for listed vehicle-related services
- Memory for vehicle-specific data
- Shielded metal housing
Function
The emergency call system control unit has its own microprocessor. A differentiation is made between the 2 subareas of the communication module with NAD and the locating module. The emergency call system control unit centrally processes all the vital data for the listed vehicle-related services.
The emergency call system control unit uses the installed locating module to calculate the vehicle position and generates a data telegram in the form of an SMS when one of the following vehicle-related services has been activated:
- Manual or automatic emergency call, including police emergency call number "911"
- MB-Info call
- Breakdown assistance
- Vehicle remote door unlock
communication module
The communication module integrated into the emergency call system control unit is a mobile phone transceiver enabling voice and data communication with the service center over mobile phone frequencies. This supports communication via the digital Code Division Multiple Access (CDMA) network.
Other functions of the communication module are:
- 4 day transmission and reception capability, as soon as an SMS is received, the emergency call system control unit is activated (wake-up); after 4 days the emergency call system reverts to the "sleep mode"
- Following activation a self-diagnosis is performed and the result sent to the "controller"
In the event of a multifunction antenna malfunction (e.g. defective because of rollover) the emergency call system control unit automatically uses the emergency call system antenna to receive and transmit mobile phone signals or data.
| Technical data Designation |
Unit | Values | Tolerance range | Remarks |
|---|---|---|---|---|
| Emergency call system control unit | ||||
| Power supply | VV | 13 | ±1 | (UB ) complished over circuit 15R |
| Voltage limits | VV | 9 | ±1 | Minimum (UBmin ) |
| VV | 16 | ±1 | Maximum (UBmax ) | |
| Power consumption | μA | ≤400 | Sleep mode (device is deactivated, "Circuit 30 OFF"), at 25 °C | |
| μA | ≤533 | Sleep mode (device is deactivated, "Circuit 30 OFF"), at -30..85 °C | ||
| mA | ≤ 12 | Idle mode (since the device occasionally wakes up in this mode, current spikes can occur) | ||
| mA | ≥ 600 | Normal mode | ||
| A | ≤ 3 | Calling mode (device is activated, with active service) | ||
| Reverse polarity protection | The emergency call system control unit is resistant to polarity reversal for a time of t = 5 min up to a maximum voltage of UVerpol
= -36 V, without damage. All inputs and outputs on the emergency call system control unit are resistant to short circuit. |
|||
| Additional specific parameters | None | |||
| Special features | The software of the emergency call system control unit processes its routines and commands independently of the connected components. The prioritization of the individual tasks is regulated by the emergency call system control unit. These priorities can be changed and defined only with the management information base (MIB). | |||
| Flash capability/coding capability | Yes/yes | |||
| Emergency call speaker or center instrument panel speaker | ||||
| Type | Speaker | |||
| Bandwidth | Hz | 250 to 10 000 | ||
| Global positioning system antenna splitter | With code (512) COMAND APS with DVD changer | |||
| Type | Antenna splitter | |||
| Frequency | MHz | 1574.4 to 1576.447 | From multifunction antenna | |
| Multifunction antenna | ||||
| Power supply | VV | 12 | Operating voltage (U Nom ) | |
| Quiescent current | mA | 1.2 | TypicalQuiescent ) | |
| mA | 1.5 | Maximum (IQuiescent ) | ||
| Wake-up | mA | ≥9 | With UB = 12 V (I Wake-Up ) | |
| Reverse polarity protection | Protected against polarity reversal up to U B = 15 V for a time of t = ∞. | |||
| Additional specific parameters | The unit withstands voltage spikes of U B = 27 V for a maximum time of t = 60 s, without damage. | |||
| Special features | ||||
| Amplifier output interference voltages | dBμV | 5 | AM maximum (UNoise ) | |
| dBμV | 8 | AM typical (UNoise ) | ||
| dBμV | 4 | FM maximum (UNoise ) | ||
| dBμV | 6 | FM typical (UNoise ) | ||
| Output | Ω | 50 | Characteristic impedance (Z A ) | |
| Flash capability/coding capability | n/a/n/A. | |||
| Emergency call system antenna | ||||
| Power supply | n/A. | |||
| Quiescent current | n/A. | |||
| Additional specific parameters | n/A. | |||
| Special features | n/A. |
| Wiring diagram for emergency call system control unit | PE82.95-P-2101-97FAA |