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Audio System Description - Overview
Overview
The audio unit acts as the processor for all audio functions. Audio functions can be selected from the audio unit buttons or the audio remote switch (on the steering wheel). The multi-information display unit and/or audio with touch screen provides the current audio status. 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 system and vehicle components for integration into the vehicle's security system. Audio with Touch Screen
The audio unit has a built-in CD/DVD-A player, and has a 5.8 inch display that is used to input audio commands. Audio units with navigation are referred to as audio-navigation units. These units combine the audio system, the navigation system, the HDD, and the CD/DVD player into one unit. Electrostatic Touch Panel (with touch screen)
The change in the electrostatic capacitance of the switch portion by touching the electrostatic touch panel is used to change the view and/or function. It is capable of soft touch operation. Hard touch operation of the touch panel is not necessary for normal operation. Heavy gloves, fingernails or pens not compatible with electrostatic touch panels cannot be used on the electrostatic touch panel. Speed-Sensitive Volume Compensation (SVC)
The audio system is equipped with speed-sensitive volume compensation (SVC). The audio-navigation unit or audio unit receives the vehicle speed pulse (VSP) from the B-CAN. The system processes the speed input and increases the audio system volume level as the vehicle speed increases to compensate for the various 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-navigation unit or audio unit. The SVC comes from the factory with the MID setting as the default (see the owner's manual for more information). Muting Logic
When using the navigation or route guidance (RG), the driver's door speaker provides the navigation sound and the rear speakers continue to play the audio. When using the HFL, the rear speakers are muted and the front speakers give the telephone sound. For more information, see the navigation section. GA-Net Bus Configuration
The GA-Net bus passes audio commands throughout the audio components. Because the entire bus is interconnected between components, an open or short in the GA-Net bus harness may cause any or all of these functions to become inoperative. Multi-information Display Unit
The multi-information display unit displays audio, trip information, and any customized screen via the audio-navigation unit or the audio unit. The multi-information display unit uses a liquid crystal display (LCD). The LCD is an 8-inch diagonal, thin film transistor (TFT). The color film and fluorescent light are laid out on the back of the liquid crystal film. This unit is controlled by the audio-navigation unit or the audio unit via the GA-Net bus and the video data bus (GVIF). Fail-Safe Function
When the multi-information unit temperature is 167 °F (75 °C) or higher, the display sends the information to the audio-navigation unit or audio unit via the GA-NET. The audio-navigation unit or audio unit outputs the warning screen for about 30 seconds and then the display back light turns off until the temperature cools down. Self-Diagnostic Function
The System Diagnostic Mode can check GA-NET data connections between the multi-information display unit. The System Diagnostic Mode also includes several screens designed to check the dot matrix screen performance. Rearview Camera (without navigation)
When the vehicle is in R position/mode, the audio unit receives the back-up light signal. The rearview camera image and the guide lines automatically appear on the multi-information display unit. You can adjust the guide lines in the self-diagnostic function. Multi-View Rear Camera System
The multi-view rear camera system is a function that provides three different views images of the rearview camera to the multi-information display unit, and can be changed by the user. The rearview guide lines change according to the selected view. The rearview camera is connected directly to the audio unit.
Basic Control
When the audio unit detects the BACK LT signal (when the vehicle is in R position/mode) for at least 0.5 seconds, the multi-information display unit turns on the rearview camera. The multi-information display unit delays for 0.5 seconds to prevent changing the screen image too frequently because of incorrect shift position/mode selection. Changing Camera Views
When the rearview camera image is displayed, the camera view can be changed from the audio unit. The audio unit sends a signal using the CAMERA BIT0 and CAMERA BIT1 to the rear view camera.
Dynamic Guide Line
When the rearview image is displayed with the guide line, the guide line 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. View Mode Memorization
Any time the audio unit loses power (battery disconnected, audio unit disconnected, etc.) the rearview camera defaults to the normal angle view. The rearview camera will also default to this angle if you had the top down angle selected when you turned the vehicle to the OFF (LOCK) mode. If you change the rearview camera to the wide view, the rearview camera will remember this view when you turn the vehicle to the ON mode. Active Noise Cancellation (ANC) System/Active Sound Control System (With active sound control system)
Both the active noise cancellation (ANC) and active sound control are built into the ANC/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 low frequencies entering the passenger compartment and send a signal to the ANC/active sound control unit. The ANC/active sound control unit then creates a sound wave that is sent out through the speakers to eliminate the unwanted sound. Active Noise Cancellation System
The ANC system works to cancel engine booming sound up to about 2,000 rpm. The ANC/active sound control unit receives the engine speed pulse (NEP) from the PCM and outputs a sine-wave-sound through the audio speakers to cancel low-frequency noise from the engine. The ANC system also uses two microphones to detect and monitor low frequency noise in the passenger compartment. The microphones feed information back to the audio unit which adjusts the speaker output to reduce the noise. The ANC also receives input from the door open/close (INTR LT) signal from the MICU. Anytime a door is opened, the ANC system temporarily stops working. Each signals send to the ANC/active sound control unit via the F-CAN. Active Sound Control System (With 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 ANC system. In addition to the microphones in the headliner, the active sound control also receives input from the engine speed pulse (NEP) to provide various levels of sound cancelling depending on changes in the engine RPM. 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. The audio-navigation unit or 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
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. To check if a USB device is compatible with the vehicle, test the USB device in a known-good vehicle of the same model and year. If the USB device does not work on the known-good vehicle, assume that the device is faulty or not compatible. A USB device may work on a later year of the same model vehicle because the audio unit software is constantly updated. Hard drives do not support overwriting the data for the track order, which is why they are not recommended. 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.
NOTE: Not all phones support the Bluetooth audio function. Supported Devices
NOTE: Availability of the functions depends on the connected phone. Self-diagnostic Function
The audio-navigation unit or audio unit is equipped with a picture diagnosis mode as part of the self-diagnostic function that allows for troubleshooting when the system has an error. Failsafe Function (with touch screen)
The failsafe function starts the following process if the system detects an abnormal heat in the audio unit.
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