Dedicated Short-Range Communications (DSRC), Function - GF82.88-P-2001GWM
Model 463 (except 463.342)
as of model year 2019
with code Z13 (ETC/DSRC)
with code Z14 (VICS (Vehicle Information + Communication System))
Function requirements for Dedicated Short-Range Communications in general
- Circuit 15R ON
- Transport mode not active
- Electronic Toll Collection System (ETC) card inserted
The electronic ignition lock control unit sends the status of circuit 15 over the user interface CAN to the head unit.
Dedicated Short-Range Communications in general
The Dedicated Short-Range Communications (DSRC) system combines the following functions:
- Payment of toll fees from the vehicle in the Electronic Toll Collection (ETC) system
- Advantages of Vehicle Information and Communication System (VICS) services
The ETC system includes not only payment at the tollbooth but also a detailed list of payments made, which is created in the head unit.
The services provided via VICS in the 5.8 GHz reception range include e.g.:
- Warning of obstacles in stretch ahead
- Information on traffic conditions in stretch ahead
- Warning if separate lanes are merged in the stretch ahead.
- Electronic direction signs
- Messages from catastrophe early warning system (e.g. earthquake and tsunami warnings)
For dynamic route guidance, VICS information in the 2.5 GHz reception range or infrared signals are received from the Vehicle Information and Communication System (VICS) control unit and via the Dedicated Short-Range Communications control unit in the 5.8 GHz reception range. The traffic messages are stored in the traffic data recorder of the head unit, decrypted and forwarded to the navigation processor on request.
Function sequence for Dedicated Short-Range Communications
The DSRC antenna and the Dedicated Short-Range Communications control unit are installed in the vehicle for exchanging ETC and VICS data in the 5.8 GHz frequency range. The DSRC antenna allows the Dedicated Short-Range Communications control unit to communicate with the tollbooth and to receive the VICS information in the 5.8 GHz range.
For the reception of microwave signals in a reception range of 2.5 GHz or infrared signals, the Vehicle Information and Communication System (VICS) control unit is connected to the Dedicated Short-Range Communications control unit. The receiver and the antenna are both integrated into the Vehicle Information and Communication System (VICS) control unit. The antenna receives VICS information from the VICS beacons installed at the side of the road (transmission masts).
A special ETC card is required for the ETC system and it has to be inserted into the Dedicated Short-Range Communications control unit.
All information concerning the user and the fees that have already been paid are stored on this card.
At the vehicle side, the Dedicated Short-Range Communications control unit is connected to the head unit via a universal serial bus (USB) interface. The acoustic signals, voice outputs, traffic information and display messages as part of the ETC and VICS functions are forwarded via this connection to the head unit.
For vehicles without code EU8 (Burmester 3D Surround Sound System) the head unit forwards the audio output straight to the speaker system.
On vehicles with code EU8 (Burmester 3D Surround Sound System), the head unit forwards the audio signals over MOST to the sound system amplifier control unit which actuates the speaker system.
The Audio/COMAND display receives the picture signals for the display messages over a high speed video link line from the head unit.
In the following cases, an ETC message is output over the speaker system and at the same time shown on the Audio/COMAND display:
- ETC card not inserted.
- ETC card read error
- ETC card not accepted.
- ETC card reader error
- Fault in the communication with the tollbooth
- Detailed information about recent toll payments available.
- Payment completed successfully (beep)
In the following cases, the LED shows an error on the Dedicated Short-Range Communications control unit (LED flashes red):
- Invalid ETC card inserted
- ETC card not inserted correctly
- Malfunction of the ETC card reader
If an ETC card is inserted and the Dedicated Short-Range Communications control unit does not recognize an error, the LED is lit in green.
| Electrical function schematic for Dedicated Short-Range Communications | PE82.88-P-2059-97ZGB | ||
| Overview of system components, telematics | GF82.85-P-9999GWM |