Nissan Cube. Manual - part 21

 

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Nissan Cube. Manual - part 21

 

 

AV

SYSTEM

AV-77

< SYSTEM DESCRIPTION >

[AUDIO WITH NAVIGATION]

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SYSTEM

System Diagram

INFOID:0000000009949605

NOTE:
An antenna base integrated with radio antenna amp. and satellite
radio antenna is adopted. 

System Description

INFOID:0000000009949606

Refer to Owner’s Manual for navigation and audio system operating instructions.
Audio function and display are built into NAVI control unit.
This navigation has the following functions.
• Map data on SD-card. 
• Full support for playback of music from iPod

®

 and USB device.

• High resolution color 5 inch display with touch panel function.
• FM/AM twin digital tuner.
• USB mass storage connection.
• Satellite radio.
• Hands-free phone system.
iPod

®

 is a trademark of Apple inc., registered in the U.S. and other countries.

NAVIGATION SYSTEM FUNCTION

Description

• The navigation system can be operated by control panel of the NAVI control unit and display (touch panel) of

the NAVI control unit.

JSNIA5426GB

JSNIA1062GB

AV-78

< SYSTEM DESCRIPTION >

[AUDIO WITH NAVIGATION]

SYSTEM

• Guide sound during the operation of the navigation system is output from NAVI control unit to front speaker.
• NAVI control unit calculates the vehicle location based on the signals from GYRO (angle speed sensor),

vehicle sensor, and GPS satellite, as well as the map data from map SD-card. It is displayed on display of
the NAVI control unit.

POSITION DETECTION PRINCIPLE

The navigation system periodically calculates the vehicle's current position according to the following three
signals:
• Travel distance of the vehicle as determined by the vehicle speed sensor
• Turning angle of the vehicle as determined by the gyroscope (angular velocity sensor)
• Direction of vehicle travel as 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
read from the map SD-card (map-matching), and indicated on the screen as a vehicle mark. More accurate
data is judged and used by comparing vehicle position detection results found by the GPS with the result by
map-matching.

The current vehicle position will be calculated by detecting the dis-
tance the vehicle moved from the previous calculation point and its
direction.
• Travel distance

Travel distance calculations are based on the vehicle speed sen-
sor input signal. Therefore, the calculation may become incorrect
as the tires wear down. To prevent this, an automatic distance cor-
rection function has been adopted.

• Travel direction

Change in the travel direction of the vehicle is calculated by a gyro-
scope (angular velocity sensor) and a GPS antenna (GPS informa-
tion). They have both advantages and disadvantages.

More accurate traveling direction is detected because priorities are set for the signals from these two
devices according to the situation.

MAP-MATCHING

Map-matching compares a current location detected by the method
in the “Location Detection Principle” with a road map data from map
SD-card.
NOTE:
The road map data is based on data stored in the map SD-card.

The vehicle position may not be corrected under the following circumstances and after driving for a certain
time when GPS information is difficult to receive. In this case, the vehicle mark on the display must be cor-
rected manually.

SEL684V

Type

Advantage

Disadvantage

Gyroscope
(angular velocity sensor)

Can detect the vehicle's turning angle quite 
accurately.

Direction errors may accumulate when vehicle is 
driven for long distances without stopping.

GPS antenna
(GPS information)

Can detect the vehicle's travel direction 
(North/South/East/West).

Correct direction cannot be detected when vehicle 
speed is low.

SEL685V

AV

SYSTEM

AV-79

< SYSTEM DESCRIPTION >

[AUDIO WITH NAVIGATION]

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• In map-matching, alternative routes to reach the destination will be

shown and prioritized, after the road on which the vehicle is cur-
rently driven has been judged and the vehicle mark has been repo-
sitioned.
Alternative routes will be shown in different order of priority, and
the incorrect road can be avoided if there is an error in distance
and/or direction.
They are of the same priority if two roads are running in parallel.
Therefore, the vehicle mark may appear on either of them alter-
nately, depending on maneuvering of the steering wheel and con-
figuration of the road.

• Map-matching does not function correctly when a road on which

the vehicle is driving is new and not recorded in the map SD-card,
or when road pattern stored in the map data and the actual road
pattern are different due to repair.
The map-matching function may find another road and position the
vehicle mark on it when driving on a road not present in the map.
Then, the vehicle mark may change to it when 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
read from the map SD-card 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)

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.

SATELLITE RADIO FUNCTION

• Satellite radio function is built into NAVI control unit.
• Sound signal (satellite radio) is received by satellite radio antenna and transmitted to NAVI control unit. NAVI

control unit outputs sound signal to each speaker and woofer.

AUXILIARY INPUT FUNCTION

• Sound can be output from an external device by connecting a device with USB connector and AUX jack.

SEL686V

SKIA0613E

SEL526V

AV-80

< SYSTEM DESCRIPTION >

[AUDIO WITH NAVIGATION]

SYSTEM

• AUX sound signals are transmitted to each speaker and woofer via NAVI control unit.

REAR VIEW MONITOR FUNCTION

Camera Image Operation Principle

• The NAVI control unit supplies power to the rear view camera when receiving a reverse signal.
• The rear view camera transmits camera images to the NAVI control unit when power is supplied from the

NAVI control unit.

• The NAVI control unit combines a warning message and fixed guide lines with an image received from the

rear view camera to display a rear view camera image on the screen.

USB CONNECTION FUNCTION

• iPod

®

 or music files in USB memory can be played. 

• Sound signals are transmitted from USB connector and AUX jack to the NAVI control unit and output to each

speaker and woofer.

• iPod

®

 is recharged when connected to USB connector and AUX jack.

iPod

®

 is a trademark of Apple inc., registered in the U.S. and other countries.

NOTE:
Use the enclosed USB harness when connecting iPod

®

 to USB connector and AUX jack.

SPEED SENSITIVE VOLUME SYSTEM

• Volume level of this system gone up and down automatically in proportion to the vehicle speed.
• The control level can be selected by the customer.

HANDS-FREE PHONE SYSTEM

• TEL adapter unit is controlled with AV communication from NAVI control unit.
• The connection between cellular phone and TEL adapter unit is performed with Bluetooth

®

 communication.

• The voice guidance signal is input from the TEL adapter unit to the NAVI control unit and output to the front

speaker when operating the cellular phone.

• TEL adapter unit has the on board self-diagnosis function. Refer to 

AV-84, "Diagnosis Description"

.

When A Call Is Originated

• Spoken voice sound output from the microphone (microphone signal) is input to TEL adapter unit. 
• TEL adapter unit outputs to cellular phone with Bluetooth

®

 communication as a TEL voice signal. 

• Voice sound is then heard at the other party.

When Receiving A Call

• Voice sound is input to own cellular phone from the other party. 
• TEL voice signal is input to TEL adapter unit by establishing Bluetooth

®

 communication from cellular phone,

and the signal is output to front speaker.

 

 

 

 

 

 

 

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