System Description: Overview: Notes
The audio unit acts as the processor for all audio functions. You can select of the audio functions from the front panel, the audio remote (on the steering wheel), or by using the navigation voice control system. The audio display provides the current front and rear audio status. For vehicles with the navigation option, additional audio information is available by touching the audio button (See the owner's manual for more details).
Each audio component passes its audio signal to the audio unit. In addition, it communicates with the audio unit via the GA-Net bus. Any open connection in this circuit will cause audio and navigation functions to appear inoperative.
With the premium sound system, an audio amplifier unit powers the speakers, otherwise the speakers are powered directly by the audio unit.
The audio unit has a built-in EEPROM (electrically erasable programmable read-only memory). This memory holds the audio presets (AM/FM radio frequency, sound settings, etc.) even when the battery is disconnected.
The system includes an active noise control system to cancel some of the vehicle noise. It uses a sine-wave-sound output to cancel low frequency noise. Two microphones detect the low frequency sound, and the system outputs a canceling sound through the audio speakers.