Audio System Description

Audio System Description

Overview

The audio unit acts as the processor for all audio functions. You can select the audio functions from the front panel, the audio remote switch (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 navigation, 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 6CD changer output can be directed to the audio unit.

The XM radio plays through the audio unit.

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

Telematics Muting Logic

The optional navigation system provides voice control for the front/rear audio, the XM, and the CD player. Voice control commands are communicated through the GA-Net (audio unit). When using the navigation TALK/BACK or route guidance (RG), only the center speaker is muted and the front speakers give the navigation instructions. When using the HFL/AcuraLink, the center speaker, the rear speakers, and the subwoofer are muted and the front speakers give the telephone sound. When using the HFL/AcuraLink and the RG (Route Guidance) or voice response, the center speaker, the rear speakers, and the subwoofer are muted and the front speakers give the telephone sound and the navigation instructions. Muting commands are passed on the GA-Net bus. For more information, see the navigation section. The outline of the audio interruption function is shown in the following table.

USB Port

The audio unit can play digital music from portable audio players, USB drivers, etc. When the device is plugged into the USB port. The audio unit uses the GA-Net to allow you to control the device from the audio unit when searching and playing the files. Not all players and player functions work with the USB port. please see the owner's manual for more information.

GA-Net Bus Configuration

The GA-Net bus passes audio and navigation commands throughout the navigation and audio components. These commands include navigation touch screen and hard button signals, audio/XM selections by voice, and XM station and music title names. Because the entire bus is "daisy chained" between components (see diagram), any open or short in the GA-Net bus harness will cause any or all of these functions to become inoperative. The addition of any audio accessory must maintain the continuity of the GA-Net bus by installing the Y cable included with the accessory kit.

Anti-Theft Feature

The audio unit has a coded theft protection circuit. Make sure you have the anti-theft security code before:

- Disconnecting the 12 volt battery.

- Disconnecting audio unit connector A (20P).

- Removing the No. 5 (7.5 A) fuse from the driver's under-dash fuse/relay box.

When the audio unit is reconnected to the power and the ignition switch is turned to ON (II), "CODE" is displayed. Then, enter the 4-digit anti-theft security code.

If you do not have the anti-theft code, see Self Diagnostic Function for information about retrieving the anti-theft code using the iN.

When replacing the audio unit, be sure to give the client the new anti-theft security code.

Bluetooth Audio

Bluetooth audio allows approved Bluetooth cell phones equipped with the music function to play music via a car audio system using Bluetooth technology.

- You can play music in your device via wireless connection. *1

- You can choose next song, previous song and resume/pause via wireless. *2

Supported Devices

- Bluetooth music phones that support AVRCP1.0/A2DP1.0.

- Bluetooth adapters for portable music devices including iPod are not supported.

NOTE:

- Availability of the functions depends on the connected device.

- The latest support information is updated through the website www.acura.com/handsfreelink.

Pairing a Cell Phone

To pair a cell phone, refer to paring a cell phone in the HandsFreeLink system. Once a cell phone is paired, the process does not have to be repeated for the phone.

Active Noise Cancellation (ANC)/Active Sound Control System

Both the active noise cancellation (ANC) and active sound control are built into the active sound control unit. Both systems help eliminate unwanted sound from entering the passenger compartment. There are two microphones mounted in the headliner, one just behind the front overhead console and the other just ahead of the overhead rear light module. The microphones listen for frequencies entering the passenger compartment and send a signal to the active noise cancellation unit. The active noise cancellation unit then creates a sound wave that sent out through the speakers to eliminate the unwanted sound.

Active Noise Cancellation (ANC) System

The active noise cancellation system works to cancel engine booming sound up to 2,000 rpm. The audio unit receives the engine speed pulse (NEP) from the PCM and outputs a sine wave through the audio speakers to cancel the low frequency sound from the engine. The active noise cancellation also uses the two microphones to detect and monitor low frequency sound noise in the passenger compartment. The microphones feed information back to the audio unit which adjusts the speaker output to reduce the noise. The active noise cancellation also receives an input from the door open/close (INTR LT) signal from the MICU. Anytime a door is opened, the active noise cancellation system temporarily stops working.

Active Sound Control System

The active sound control is the next generation of eliminating unwanted sound in the passenger compartment. The active sound control has a much broader range than the active noise cancellation system. In addition to the microphones in the headliner, the active sound control also receives input from the engine speed pulse (NEP).

How to play the Bluetooth Audio

Procedure

1. Push the DISP/AUX button to select the Bluetooth Audio source.

NOTE:

- If you push the DISC/AUX button when no cell phone is connected, NO CONNECT is displayed.
- If you see NO CONNECT when you are using cell phone music function, check that the device is properly paired, the cell phone may not be compatible. See www.acura.com/handsfreelink for more information.
- Music titles and artist names are not displayed.

1. Start the music player in the paired cell phone.

NOTE: Depending on the cell phone, the music may start automatically, or the user may need to manually select headset as an audio output.