Audio System Description - Overview

Overview

The Audio and Visual system consists of a digital audio/video playback function, wireless communication to the customer's device, and displaying the driver's support information.

Audio Unit

The audio unit acts as the processor which includes playback functions of the AM/FM, XM^*1, and HD radio^*2 tuners, USB, Bluetooth^® audio, and iPod for music. Select audio functions from the audio unit buttons, touch screen (touch the display directly to select items on the screen), or the audio remote switch (on the steering wheel).

*1: With XM
*2: With navigation

The audio unit supports playback function for a CD, CD-R, and CD-RW. Also, MP3, WMA, and AAC formats are available. The audio unit has a built-in EEPROM (electrically erasable programmable read-only memory). This memory holds the audio presets (radio presets, sound settings, etc.) even when the 12 volt battery is disconnected. When playing an audio disc, the audio data is saved temporarily on the shock proof memory for reducing audio disc skip.

There are three kinds of audio units according to a vehicle model.

	Display Audio	Color Audio	Normal Audio
With Navigation	?	×	×
Without Navigation	?	?	?

Display Audio Type

The audio unit consists of a simple component which does not have an audio disc player, and has a 7-inch WVGA electrostatic capacitance touch panel. The surface of the display is given an oil-proof coating to help reduce fingerprint smudging. This unit displays vehicle information^*, various applications screen, and can operate the audio, navigation, and HFL systems by touching the display. Additionally, the display shows the rearview image when receiving a reverse signal. An antenna for Bluetooth communication and an antenna for wireless LAN communication are built into the audio unit. As an advanced feature, a LaneWatch image indication, smart phone linkage, and a HFL function which includes an external microphone.

*: This unit displays trip computer screen. Contents of these screens are based on F-CAN and B-CAN information.

An audio unit with navigation function is referred to as audio-navigation unit. The navigation map data is installed in this unit (refer to the Navigation System Overview).

The audio unit has a gyro sensor and a GPS antenna circuit. The GPS information is used for a function that needs vehicle location other than the navigation function.

Electrostatic Capacitance Touch Panel

To use the touch-screen, bring your finger close to the screen or gently touch it with your finger. The touch sensor senses the change of the electrical charge when your finger is close to the screen and detects the position of the electrical charge. Use only a gentle touch to select or move the screen image. A hard finger press is not necessary. The screen cannot sense your touch if you wear heavy gloves, use a fingernail, or a pen.

Color Audio Type

The audio unit has a 5-inch VGA display panel. This unit can operate the audio and HFL systems (this screen is not touch sensitive). Additionally, the display shows the rearview image when receiving a reverse signal (B-CAN information). An antenna for Bluetooth communication is built in the audio unit. As an advanced feature, a HFL function is available that includes an external microphone.

Normal Audio Type

The audio unit has an OLED (Organic Light-Emitting Diode) display panel that displays audio information. A microphone for the HFL system and a jack for auxiliary audio input are built in the audio panel. An antenna for Bluetooth communication is also built in the audio unit. The unit has an illumination ON/OFF function that is controlled by the ILLUMI+ signal and the ILLUMI CANCEL signal.

Audio Unit Functions

Anti-Theft Function (With Audio System Theft Protection)

The audio unit has an anti-theft protection function separate from the security system of the vehicle. If the audio unit is removed from the vehicle, the audio unit requires a procedure to unlock the security system in order to use it again after the audio unit is reconnected. There are two kinds of anti-theft mode release procedures:

	While displaying the security code entry screen or the conformation screen of the anti-theft system, press and hold the POWER () button for at least 2 seconds. The audio unit automatically exits the anti-theft mode. This procedure needs verifying with specific information about the vehicle.
	While displaying the security code entry screen, enter the 5-digit anti-theft code.

The System Diagnostic Mode (includes checking hard error codes) can be used even if the audio unit is in the anti-theft mode.

If you substitute the audio unit into another vehicle, you must either enter the anti-theft code or perform the anti-theft skip mode in the System Diagnostic Mode (This mode will release the anti-theft code for 150 seconds).

Self-Diagnostic Function

The audio unit has a self-diagnostic function to check the failure of the audio unit or its connection. Additionally, the audio unit has original hard error codes^* that are shown on the diagnostic screen to identify the failure.

*: With display audio

Fail-Safe Function

The audio unit performs the fail-safe control when the system detects an abnormal high temperature in the unit:

	Built-in cooling fan on/off control^*: When the audio unit temperature is too high, the audio unit turns the cooling fan on until the temperature cools down.
	Display backlight on/off control: When the audio unit display temperature is too high, the audio unit displays the error message and then the display back light turns off (the background system stay on) until the temperature cools down.

*: With display audio

Operation Restriction (Without Normal Audio)

The audio unit has a function that restricts certain operations of audio and visual system that may affect safe driving.

USB Connection

For vehicles with an audio unit (display audio type), two USB ports are equipped for an external device input or a smartphone connection.

	USB port A supports charging to USB devices by a 1.5 A electric supply.
	USB port B supports charging to USB devices by a 1.0 A electric supply.

For vehicles with an audio unit (except display audio type), a USB port is equipped for an external device input. The USB port supports charging to USB devices by a 1.0 A electric supply.

Bluetooth Connection

The audio unit can be paired with a compatible cell phone or a device for Bluetooth communication. Pairing procedures vary by the connection history and Bluetooth version of the cell phone or the device. Refer to the Owner's Manual.

The audio unit supports Bluetooth Ver 4.0+EDR (Ver 2.1+EDR^*). Bluetooth enables audio streaming, wireless play back on an audio device, hands-free calling with a cell phone, data communication, and phone book loading.

*: Without display audio

Wireless LAN Connection (With Display Audio)

The audio unit supports wireless LAN connection based on the IEEE 802.11 b/g/n standard. The audio unit can connect the device that has a function as a Wi-Fi access point.

Speed-Sensitive Volume Compensation (SVC) (With Display Audio or Color Audio)

Some audio systems are equipped with speed-sensitive volume compensation (SVC). The audio unit receives the vehicle speed pulse (VSP) from the gauge control module (B-CAN). The system processes the speed input and increases the audio system volume level as the vehicle speed increases to compensate for the interior noise that occurs at higher speeds. When the vehicle slows down, the volume returns to its normal level. The SVC has four settings: SVC OFF, SVC LOW, SVC MID, and SVC HIGH that can be adjusted using the audio unit.

HD Radio^(TM) (With Navigation)

HD Radio^(TM) is a crystal clear digital audio broadcast by local radio stations. There is no charge for HD radio^(TM). Simply tune to your favorite station, and if the station is broadcasting with HD Radio^(TM) technology, then the radio will automatically pick up the digital signal, and begin playing the crystal clear, subscription free audio. Refer to your Owner's Manual to determine how your particular receiver indicates HD Radio^(TM) reception and how to transition from the main program to the multicast program(s).

	The HD1 channel acquires analog station first and blends with the digital signal. Therefore, the digital audio may have a short delay.
	There is no analog signal available on the HD2/HD3 channels. Therefore there is a short delay while decoding the digital audio. The audio will begin playing when available.
	Go to www.hdradio.com for stations in the area to verify correct operation on the station.

Internet Radio (USA models with Display Audio)

The audio system includes the Pandora^® application installed in the audio unit as separate audio sources. The audio unit uses the customer's smartphone data connection to access the Pandora^® server, and transmits the internet radio data to the audio unit via the USB or Bluetooth.

Song By Voice^(TM) (With Navigation)

A customer can use the Song By Voice^(TM) feature to select and play the audio files in an iPod or a USB device with voice commands.

When an iPod or a USB device is connected to the audio unit, the unit makes a dictionary from the album name, the folder name, the artist name, the track name, and the file name.

If a different device is connected, or the customer updates the files on the connected device, a new dictionary is created.

Bluetooth Audio

Bluetooth audio allows approved Bluetooth phones equipped with music function to play music via the vehicle's audio system using Bluetooth technology. You can control the phone's music player remotely using the wireless connection.

	You can play music stored in your phone using the wireless connection.
	You can choose next song, previous song and resume/pause via the wireless connection.

NOTE: Not all phones support the Bluetooth audio function.

Supported Devices

	Bluetooth music phones that support A2DP 1.0 and AVRCP 1.0, 1.3, and 1.4.
	Bluetooth adapters for portable music devices including iPod are not supported.

NOTE: Availability of the functions depends on the connected phone.

USB Adapter

The audio system can play digital music from portable audio players, a USB drive, etc. when the device is plugged into the USB port. When the vehicle is turned to the ACCESSORY mode, the audio unit begins to communicate with the connected USB device, and to supply the VBUS power. The audio unit controls the device when searching and playing the files. Not all players and player functions work with the USB adapter. Please see the Owner's Manual for more information.

Supported Devices

	Supports for USB Mass storage class and Bulk-only transport are supported.
	USB 2.0 Full-speed capable.
	USB formatted to be compatible with Windows-based operating systems.
	If the USB has a security feature, like write protection, it must be turned off.

There are many different USB drives, manufacturers, and configurations with new devices being released every day, which makes it impossible to test all USB devices with the audio system. Even if the USB device has all these requirements, it may not be compatible.

Hard drives do not support overwriting the data for the track order, which is why they are not recommended.

When you disconnect a USB device, the data for the track order remains in the audio unit's memory so when you reconnect the same USB device, the audio unit continues playing from the location where it was disconnected. If a new USB device is connected, the data for the track order is rewritten and you need to select the album or music file.

Smartphone Linkage Function (With Display Audio)

This function ensures safe use of smartphone while driving. Connect a smartphone to the audio unit to use it. Connection methods vary depending on carriers.

When using the navigation function via a smartphone, The audio unit can display the navigation map screen that is in the connected smartphone. In this case, the GPS signal is received by the audio unit, and the vehicle signals are received from the F-CAN and the B-CAN as information of vehicle status.

The vehicle signal that is used for vehicle position tuning does vary by the connected smartphone.

When using the voice recognition function via a smartphone, the HFL microphone in the roof console picks up the driver's voice, and sends the voice signal to the smartphone via the audio unit using Bluetooth.

Muting Logic

When using the navigation route guidance (RG), the front speakers provide the navigation sound and the rear speakers continue to play the audio.

The outline of the muting logic is shown in this table:

Contents	Audio Output
Contents	Left Front CH	Right Front CH	Right Rear CH	Left Rear CH
Route Guidance^*	Navigation output	Attenuated audio	Attenuated audio	Attenuated audio
HFL	HFL output	HFL output	Muted	Muted
HFL and Route Guidance^*	Navigation output	HFL output	Muted	Muted

*: With navigation

Verbal Reminder (With Display Audio)

This function allows the audio unit to inform the driver that the seat belt is not fastened or that the parking brake is still applied. Information using in this function comes from the gauge control module via the B-CAN. The audio alerts come through the driver's door speaker.

Roof Antenna

The AM/FM antenna and the XM antenna^* are integrated into the roof antenna. The sensitivity of FM signal is raised by the auto gain control.

*: With XM

For vehicles with Sirius XM^® radio, the XM antenna receives satellite signals and terrestrial signals by using the high-gain antenna. Signals are sent to the audio unit via the dedicated single line (SAT/TER).

Multi-View Rearview Camera

The multi-view rearview camera is a function that provides three different views of the rearview camera to the audio unit, and can be changed by the user. The rearview guidelines change according to the selected view. The rearview camera is connected directly to the audio unit.

	Normal View Mode The display shows the standard view.
	Wide View Mode The display shows wider visibility than the normal view, which helps the driver confirm any objects approaching from right and left.
	Top Down View Mode The display shows the view from the top angle of the vehicle, which helps the driver confirm the distance to any object behind.

Basic Control

When the audio unit detects the BACK LT signal (when the transmission is shifted to R position/mode) for at least 0.3 seconds, the audio unit display turns on the rearview camera image. The display delays for the 0.3 seconds to prevent changing the screen image too frequently because of incorrect shift position/mode selection. You can change the view mode by touching the mode icon^*1 or by pressing the SELECTOR knob^*2.

*1: With display audio

*2: With color audio

Guidelines Type A

Guidelines Type B

Changing Camera Views

When the rearview camera image is displayed, touching the mode icon sends a signal from the audio unit to the rearview camera using the CAMERA BIT0 and CAMERA BIT1 signal lines to change the rearview camera view.

	Wide	Normal	Top Down
CAMERA BIT0 Signal	OFF (0 V)	ON (4 V - 9 V)	OFF (0 V)
CAMERA BIT1 Signal	OFF (0 V)	OFF (0 V)	ON (4 V - 9 V)

View Mode Memorization

The audio unit maintains the last view mode for 10 seconds after you shift the transmission to other than R position/mode. After that, the audio unit maintains the last view mode (only wide view and normal view) even if the vehicle turned to the OFF (LOCK) mode. The rearview camera image will change to the wide view if you had the top down view selected when you turn the vehicle to the OFF (LOCK) mode.

Dynamic Guideline (With Display Audio)

When the rearview image is displayed with the guideline, the guideline changes according to the steering angle input (When the steering rotates 90 degrees or more). The steering angle information is received from the gauge control module via the B-CAN as vehicle signals.

HondaLink Assist (USA and Canada models with Display Audio)

HondaLink delivers remote services to the vehicle using the customer's compatible Bluetooth phone.

If the SRS airbag is deployed, the SRS unit sends a signal to the audio unit via the F-CAN. Then the audio unit calls a PSAP (Public Safety Answering Point) automatically using the customer's compatible Bluetooth phone, and sends the vehicle location using DTMF (Dual-Tone Multi-Frequency). The audio unit uses the GPS antenna for tracking the vehicle location.