Function requirements for voice control system, general
Circuit 30g ON
Transport mode not active
No smartphone connected via CarPlay to the multimedia connection unit (A90/5)
Voice control system, general
The individual functions of the driver information system are called up and operated via the voice control system (VCS [SBS]). The VCS is integrated in the audio equipment. The voice control system can be controlled by spelling out or entering complete words.
The voice control system is activated or deactivated via the following buttons on the multifunction steering wheel (MFL):
Voice control system ON button (S111s4)
"Back" and voice control system OFF button (S110s4)
The control signals of the voice control system buttons are transmitted as follows (up to 09.05.2013):
Steering wheel electronics (N135)
Steering LIN (LIN E1)
Steering column tube module control unit (N80)
Chassis CAN (CAN E)
Instrument cluster (A1)
Interior CAN (CAN B)
Audio unit
The control signals of the voice control system buttons are transmitted as follows (as of 10.05.2013):
Steering wheel electronics
Steering LIN
Steering column tube module control unit
Chassis CAN 1 (CAN E1)
Front SAM control unit with fuse and relay module (N10/1)
Chassis CAN 2 (CAN E2)
Instrument cluster
Interior CAN
Audio unit
Voice input takes place via the hands-free system microphone (A67b1), which is connected to the audio equipment via a direct line.
The words that are spoken are converted into an electrical signal by the hands-free system microphone group and forwarded to the audio equipment. The audio equipment processes the signals internally and implements them accordingly.
Voice recognition by the processor integrated in the audio equipment requires the driver's voice to be taught in beforehand.
If the driver's voice or the message of the voice command cannot be uniquely identified, the VCS [SBS] issues a query.
The audio signals are generated by the audio equipment and emitted over the speaker system, on vehicles with CODE 810 (Sound system) over the Media Oriented System Transport (MOST) and the sound system amplifier control unit (N40/3).