Nissan Teana J32. Manual - part 139

AV

NAVIGATION SYSTEM

AV-411

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

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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
DVD-ROM stored in DVD-ROM drive.
NOTE:
The road map data is based on data stored in the map DVD-ROM.

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.
• 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.

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

SEL686V

AV-412

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

NAVIGATION SYSTEM

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

the vehicle is driving is new and not recorded in the map DVD-
ROM, 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 DVD-ROM 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) was developed for and is con-
trolled by the US Department of Defense. The system utilizes GPS
satellites (NAVSTAR), sending out radio waves while flying on an
orbit around the earth at an altitude of approximately 21,000 km
(13,100miles).
The GPS receiver calculates the vehicle's position in three dimen-
sions (latitude/longitude/altitude) according to the time lag of the
radio waves received from four or more GPS satellites (three-dimen-
sional positioning). The GPS receiver calculates the vehicle's posi-
tion in two dimensions (latitude/longitude), utilizing the altitude data
calculated previously with radio waves from four or more GPS satel-
lites (two-dimensional positioning) if radio waves were received only
from three GPS satellites.
Position correction by GPS is not available while the vehicle is stopped.
Accuracy of GPS will deteriorate under the following conditions:
• In two-dimensional positioning, GPS accuracy will deteriorate when altitude of the vehicle position changes.
• The accuracy can be even lower depending on the arrangement of the GPS satellites utilized for the posi-

tioning.

• Position detection is not possible when vehicle is in an area where radio waves from the GPS satellite do not

reach, such as in a tunnel, parking lot in a building, and under an elevated highway. Radio waves from the
GPS satellites may not be received when some object is located over the GPS antenna.

NOTE:
• Even a high-precision three dimensional positioning, the detection result has an error about 10 m (30ft).
• Because the signals of GPS satellite is controlled by the Tracking and Control Center in the United States,

the accuracy may be degraded lower intentionally or the radio waves may stop.

SKIA0613E

SEL526V

AV

NAVIGATION SYSTEM

AV-413

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

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Component Parts Location

INFOID:0000000003777930

1.

Front squawker RH

2.

Center speaker

3.

Front squawker LH

4.

Front door speaker LH

5.

Rear door speaker LH

6.

Rear control switch

7.

Rear squawker LH

8.

Woofer LH

9.

NAVI control unit

10.

BOSE amp.

11. Rear view camera

12. Woofer RH

JPNIA1059ZZ

AV-414

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

NAVIGATION SYSTEM

Component Description

INFOID:0000000003765838

13.

Camera control unit

14. TEL antenna

15. Rear squawker RH

16.

Antenna amp.

17. GPS antenna

18. Rear door speaker RH

19.

Front door speaker RH

20. Steering angle sensor

21. Steering switch

22.

AV control unit

23. Auxiliary input jacks

24. Preset switch

25.

DVD player

26. Multifunction switch

27. Display unit

28.

Microphone

  

 A.

Trunk room upper LH

B.

Trunk room upper RH

C.

Trunk room side RH

D.

Within rear pillar finisher RH

E.

Within rear pillar finisher RH

F.

Within rear parcel shelf finisher 

G.

Spiral cable part

H.

In center console

I.

In grove box

Part name

Description

AV CONTROL UNIT

• It is the master unit that controls each operation of the Navigation system.
• The RGB signal (map information) is output to the display unit.
• The voice guidance signal is output to the BOSE amp.

NAVI CONTROL UNIT

• Map data can be read from the Map DVD-ROM by installing Map DVD-ROM.
• NAVI control unit sends map data to AV control unit.
• The voice guidance signal is output to the AV control unit.

Map DVD-ROM

A collection of map data.

DISPLAY UNIT

• Map image signal is input from NAVI control unit via AV control unit.
• Each operation of navigation can be performed by the touch panel function.

BOSE AMP.

Voice guidance signal is input from AV control unit, and it is output to front LH/RH 
speakers.

FRONT SPEAKER

Voice guidance signal from BOSE amp. is output.

FRONT SQUAWKER

MULTIFUNCTION SWITCH

• Each operation of navigation can be performed.
• The multifunction switch is connected to the preset switch by wiring harness, 

and it transmits the operation signal to the preset switch.

STEERING SWITCH

• Each operation of navigation, etc. can be performed.
• Switch operating signal is output to AV control unit.

GPS ANTENNA

GPS signal is received and is output to NAVI control unit.