Radio, Stereo, and Compact Disc: Description and Operation

Audio System Description

Overview

The audio-navigation unit or audio unit acts as the processor for all audio functions. To select audio functions, use one of the following inputs:

- Audio-navigation unit or audio unit
- Audio remote switch on the steering wheel (with navigation)
- Navigation voice control system (with navigation)

The audio display provides the current audio status. For vehicles with navigation, additional audio information is available by touching the audio button on the navigation screen (See the Owner's Manual and the navigation system manual for more details.).
The audio system is equipped with the auxiliary input jack (AUX) in the center panel (without navigation), or in the center lower trim (with navigation). The system accepts auxiliary audio inputs using a 3.5 mm stereo mini plug.

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.

A security signal is daisy-chained between the audio and vehicle components and integrated into the vehicle's security system.

Speed-sensitive volume compensation (SVC)

The audio system is equipped with speed-sensitive volume compensation (SVC). The audio unit receives the vehicle speed pulse (VSP) from the ECM/PCM. The system processes the speed input and increases the audio system volume level as the vehicle speed increases to compensate for the interior noises that occur at higher speeds. When the vehicle slows down, the volume returns to its normal level. The SVC has four settings: SVC OFF, LOW, MID, and HIGH that can be adjusted using the audio unit. The factory default setting is MID (see the Owner's Manual for more information).

USB adapter

- The audio system supports compressed audio files that are saved on a USB audio device and connected to the audio unit through the USB adapter.
- The audio unit supports GA-Net address and commands for the USB adapter unit (without navigation).
- When the USB device with audio files is connected to the USB adapter, you can select and play the music files using the audio unit controls.
- The audio or audio-navigation unit powers the USB audio device through the USB adapter.
- Connect the USB audio device using the USB adapter cable located in the glove box (see Owner's Manual).

NOTE: Not all players and player functions work with the USB adapter. See the Owner's Manual for more information.

Muting Logic

The navigation system allows voice control of the audio system and the CD player. Voice control commands are communicated on the GA-Net. When using the navigation TALK/BACK button, the audio is muted on all speakers and you get navigation sound on the front channels. When using the navigation or route guidance (RG), the front speakers give the navigation sound and the rear speakers continue to play. For more information, see the navigation section. The outline of the interruption function is shown in this table.