Nissan Leaf. Manual — part 58
AV
SYSTEM
AV-223
< SYSTEM DESCRIPTION >
[NAVIGATION WITHOUT BOSE]
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CARWINGS Reading Voice Signal
• In the case of the CARWINGS reading voice, the AV control unit receives text data from the NISSAN CAR-
WINGS Data Center through the USB harness and outputs them to the front speaker.
• If CARWINGS data is read while the audio is ON and/or the voice guidance is being output, these audio
sounds are muted and only the CARWINGS reading voice is output.
• Depending on the information from the NISSAN CARWINGS Data Center, not only the CARWINGS reading
voice but also background music may be output. In this case, audio output of the front speaker is turned
down 10 dB and then the CARWINGS reading voice is output.
Guide Sound Signal
• Voice signals output during the route guidance of the navigation system are output from the AV control unit
to the front speaker.
• If the voice guidance is output with the audio ON, audio output of the front speaker is turned down 10 dB and
then voice guidance is output.
• Adjusting the volume while the voice guidance is being output can change the volume of the guidance.
AUDIO FUNCTION
• The MP3/WMA playback function enables music to play for a long time: the user need not change the CD
during a long trip. The text display function is also adopted so that the title name and artist name of the ID3
tag/WMA tag can be displayed.
• Bluetooth
®
audio function is adopted to play music data in the portable audio via wireless communication.
• The adoption of the vehicle speed interlock sound volume function reduces the burden of the volume adjust-
ment by the difference between the noises when the vehicle is stopped or running. In addition, the vehicle
speed interlock sound volume function can perform ON/OFF setting and sound volume adjustment on a
scale of one to five.
MP3/WMA Playback Function
This function enables the playback of compressed music files, such as MP3 music files used for the most
widespread broadband music distribution and WMA music files played back with a music player generally built
in Windows
®
personal computers.
Vehicle Speed Interlock Volume Function
• The AV control unit receives the vehicle speed signal from the combination meter via CAN communication
and changes the sound volume in conjunction with the vehicle speed.
• Using the vehicle speed interlock sound volume function, ON/OFF setting can be carried out as preferred by
users, and sound volume variation caused by vehicle speed change can be adjusted on a scale of one to
three.
Bluetooth
®
Audio Function
• Bluetooth
®
audio function is adopted to play music data in the portable audio in wireless communication.
• Five units of Bluetooth
®
communication devices including audio devices and cellular phones can be regis-
tered to the AV control unit.
• When the Bluetooth
®
audio is connected to the portable audio through Bluetooth
®
, it can play the music data
in the portable audio.
• When the Bluetooth
®
audio is playing the data, operations of the other applications are as shown in the fol-
lowing table.
Cellular phone operation (control) status
Bluetooth
®
audio playback status
Hands-free phone communication
Hands-free phone incoming call
Answering the call stops audio playback temporarily.
CARWINGS service
Information channel and E-mail
Audio playback does not stop.
Audio playback stops temporarily during data commu-
nication.
After the communication has been completed, play-
back resumes.
Telephone book transfer
Audio playback does not stop.
For Bluetooth
®
audio, audio playback stops temporari-
ly.
After the telephone book has been transferred, play-
back resumes.
AV-224
< SYSTEM DESCRIPTION >
[NAVIGATION WITHOUT BOSE]
SYSTEM
Bluetooth
®
compliant profile
Satellite Radio
• Satellite radio tuner is built into AV control unit.
• Audio signal and data signal (satellite radio) are received by satellite antenna. There are input to AV control
unit. AV control unit outputs audio signal to each speaker and data signal to display unit.
USB CONNECTING FUNCTION
USB connector enables iPod
®
compliant and playback of music files in the USB memory.
*: iPod
®
is the trademark of Apple Inc. registered in the United States and other countries.
iPod
®
Compliant
• By connecting a user's iPod
®
to the USB connector, music can be played.
• While iPod
®
is connected, iPod
®
is charged.
• It is compliant with various playback methods.
NAVIGATION SYSTEM FUNCTION
Description
• The AV control unit controls navigation function while GPS tuner has built-in map data, GYRO (angle speed
sensor), on the SD card.
• The AV control unit inputs operation signal with communication signal, through front display unit (touch
panel) and multifunction switch and steering switch.
• Guide sound is output to front speaker through from AV control unit when operating navigation system.
• A vehicle position is calculated with the GYRO (angle speed sensor), vehicle sensor, signal from GPS satel-
lite and map data stored on SD card, and transmits the map image signal (RGB image, RGB area, RGB
image synchronizing) to the display.
Position Detection Principle
The navigation system periodically calculates the current vehicle
position according to the following three types of signals.
• Travel distance of the vehicle as determined by the vehicle speed
sensor
• Vehicle turning angle determined by the gyroscope (angular speed
sensor)
• The travel direction of the vehicle determined by the GPS antenna
(GPS information)
The current position of the vehicle is then identified by comparing the
calculated vehicle position with map data, which is stored in the SD
card (map-matching), and indicated on the screen with a current
location mark. More accurate data is used by comparing position
detection results from GPS to the map-matching.
The current position is calculated by detecting the travel distance
from the previous calculation point, and its direction change.
• Travel distance
The travel distance is generated from the vehicle speed sensor
input signal. The automatic distance correction function is adopted
for preventing a miss-detection of the travel distance because of
tire wear etc.
• Travel direction
The gyroscope (angular velocity sensor) and GPS antenna (GPS
information) generate the change of the travel direction. Both have
advantages and disadvantages as per the following descriptions.
Profile name
Abbreviation
Version
Advanced Audio Distribution Profile
A2DP
Ver. 1.2
Audio Video Remote Control Profile
AVRCP
Ver. 1.3
JSNIA3779GB
SEL684V
AV
SYSTEM
AV-225
< SYSTEM DESCRIPTION >
[NAVIGATION WITHOUT BOSE]
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Input signals are prioritized in each situation. However, this order of priority may change in accordance with
more detailed travel conditions so that the travel direction is detected more accurately.
Map-matching
Map-matching repositions the vehicle on the road map when a new
location is judged to be more accurate. This is done by comparing
the current vehicle position (calculated by the normal position detec-
tion method) from the map data stored in the SD card.
There is a possibility that the vehicle position may not be corrected in the following case, and when vehicle is
driven over a certain distance or time in which GPS information is hard to receive. Correct manually the cur-
rent location mark on the screen.
• In map-matching, several alternative routes are prepared and pri-
oritized in addition to the road judged as currently driving on.
Therefore, due to errors in the distance and/or direction, an incor-
rect road may be prioritized, and the current location mark may be
repositioned to the incorrect road.
If two roads are running in parallel, they are of the same priority.
Therefore, the current location mark may appear on either of them
alternately, depending on maneuvering of the steering wheel and
configuration of the road, etc.
• Map-matching does not function correctly when road on which the
vehicle is driving is new, etc. and not recorded in the map data.
Also, map-matching does not function correctly when road pattern
stored in the map data and the actual road pattern are different due
to repair, etc.
Therefore, the map-matching function judges other road as a cur-
rently driving road if the road is not in the map, and displays the
current location mark on it. Later, the current location mark may be
repositioned to the road if the correct road is detected.
• Effective range for comparing the vehicle position and travel direc-
tion calculated by the distance and direction with the road data is
limited. Therefore, correction by map-matching is not possible
when there is an excessive gap between current vehicle position and the position on the map.
GPS (Global Positioning System)
Type
Advantage
Disadvantage
Gyroscope (angular velocity
sensor)
The turning angle is precisely detected.
Errors are accumulated when driving a long dis-
tance without stopping.
GPS antenna (GPS informa-
tion)
The travel direction (North/South/East/West) is
detected.
The travel direction is not precisely detected when
driving slowly.
SEL685V
SEL686V
JSNIA0180GB
AV-226
< SYSTEM DESCRIPTION >
[NAVIGATION WITHOUT BOSE]
SYSTEM
GPS (Global Positioning System) is developed for and is controlled
by the US Department of Defense. The system utilizes GPS satel-
lites (NAVSTAR), transmitting out radio waves while flying on an orbit
around the earth at an altitude of approximately 21,000 km (13,049
mile).
The receiver calculates the travel position in three dimensions (lati-
tude/longitude/altitude) according to the time lag of the radio waves
that four or more GPS satellites transmit (three-dimensional position-
ing). The GPS receiver calculates the travel position in two dimen-
sions (latitude/longitude) with the previous altitude data if the GPS
receiver receives only three radio waves (two-dimensional position-
ing). GPS position correction is not performed while stopping the
vehicle.
Accuracy of the GPS will deteriorate under the following conditions:
• In two-dimensional positioning, GPS accuracy will deteriorate when altitude of the vehicle position changes.
• The position of GPS satellite affects GPS detection precision. The position detection may not be precisely
performed.
• The position detection is not performed if GPS receiver does not receive radio waves from GPS satellites.
(Inside a tunnel, parking in a building, under an elevated highway etc.) GPS receiver may not receive radio
waves from GPS satellites if any object is placed on the GPS antenna.
NOTE:
• The detection result has an error of approximately 10 m (32.81 ft) even with a high-precision three dimen-
sional positioning.
• There may be cases when the accuracy is lowered and radio waves are stopped intentionally because the
GPS satellite signal is controlled by the US trace control center.
BLUETOOTH
®
HANDS-FREE PHONE FUNCTION
• When the cellular phone is connected to the AV control unit in Bluetooth
®
communication, hands-free phone
communication can be performed.
• Simply operating the steering switch without releasing hands from the steering wheel allows the driver to
make a phone call or receive a phone call.
• For the available cellular phone support model, refer to "Compliant model list" on the CARWINGS site.
• When a Bluetooth
®
communication compliant phone is registered to the AV control unit, hands-free phone
communication can be performed. Five units of Bluetooth
®
communication devices including audio devices
and cellular phones can be registered to the AV control unit.
• The content of the memory (telephone book) of the cellular phone can be recorded in the AV control unit.
Bluetooth
®
compliant profile
VOICE RECOGNITION FUNCTION
• By speaking a command, operations of navigation and hands-free phone can be performed.
• To perform the voice control, press the switch of the steering switch. The system changes to the speech
reception status. When a command is spoken, the speech recognition result is displayed, and the operation
is executed.
• The voice control cannot be performed under the conditions listed below.
- When the hand-free phone is used
- When the vehicle is moving backwards
Major Functions
With this function, the list of commands used for telephone, and navigation operation can be checked.
REAR VIEW CAMERA FUNCTION
Operation Description
• When the selector lever is shifted to the reverse position, the rear view monitor image is displayed.
SEL526V
Profile name
Abbreviation
Version
Hands-Free Profile
HFP
1.5
Dial-Up Networking Profile
DUN
1.1
Object Push Profile
OPP
1.1
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