System Description: Overview

The audio unit acts as the processor for all audio functions. You can select the audio functions from the audio panel, the audio remote (on 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 or 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.

The audio unit has a built-in EEPROM (electrically erasable programmable read-only memory). This memory holds the audio presets data (AM/FM radio frequency, sound settings, etc.) even when the battery is disconnected.

With the ELS and the premium sound system, an audio amplifier unit powers the speakers.

The 6 DVD (6 CD) changer output can be directed to the audio unit.

The XM can be output to either the front or the RES (rear entertainment system). However, if the XM is playing in the front, the CD changer cannot be used for the RES. The RES (built into the audio unit) can be used to play a CD in the rear.

A security signal is daisy-chained between the audio, RES and navigation components for integration into the vehicle's alarm system.

The optional navigation system provides voice control for radio, XM, CD player, and RES functions. The GA-Net (audio unit) communicates the voice control commands. When using the TALK/BACK or route guidance (RG), only the center speaker is muted and you hear the navigation instructions through the front speakers. When using HFL/AcuraLink, the center speaker, the rear speakers, and the subwoofer are muted and the front speakers give the telephone sound. When using HFL/AcuraLink and RG or TALK/BACK, the center speaker, the rear speakers, and the subwoofer are muted and you hear the telephone sound and navigation instructions through the front speakers but not the RES headphones. GA-Net bus passes the muting commands. For more information, see the NAVIGATION SYSTEM article. The outline of the audio interruption function is shown in the following table.