Nissan Maxima. Instruction — part 173
AV-512
< SYSTEM DESCRIPTION >
[COLOR DISPLAY - W/BOSE & NAVI]
AUDIO SYSTEM
Component Parts Location
INFOID:0000000009471427
1.
Tweeter LH M51
2.
Center speaker M130
3.
Tweeter RH M52
4.
AV control unit M160, M161, M162,
M163, M164, M165, M166, M167,
M168 (located behind A/C and AV
switch assembly)
5.
Display unit M142, M151
6.
A/C and AV switch assembly M98
AWNIA3228ZZ
AV
AUDIO SYSTEM
AV-513
< SYSTEM DESCRIPTION >
[COLOR DISPLAY - W/BOSE & NAVI]
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Component Description
INFOID:0000000009471428
7.
Steering angle sensor M53 [located
in steering column behind combina-
tion switch (spiral cable)]
8.
Steering wheel audio control switch-
es
9.
USB interface M211(view in center
console)
10. Aux in jack M209
11. Microphone R7
12. Rear view camera T101
13. Front door speaker
LH D3
RH D103
14. Rear door speaker
LH D202
RH D302
15. Rear subwoofers (view under rear
parcel shelf)
LH B106
RH B107
16. BOSE speaker amp B109, B110
Part name
Description
AV control unit
Controls audio system, USB connection, AUX IN connection, NAVI functions
and satellite radio system functions.
Display unit
Displays all audio and climate control related information.
BOSE speaker amp.
Receives power (amp ON) and audio signals from AV control unit and out-
puts audio signals to each speaker.
Steering wheel audio control switches
• Audio operation can be operated.
• Steering switch signal is output to AV control unit.
Front door speakers
• Outputs audio signal from BOSE speaker amp.
• Outputs high, mid and low range sounds.
Tweeters
• Outputs audio signal from BOSE speaker amp.
• Outputs high range sounds.
Center speaker
• Outputs audio signal from BOSE speaker amp.
• Outputs high range sounds.
Rear door speakers
• Outputs audio signal from BOSE speaker amp.
• Outputs high, mid and low range sounds.
Rear subwoofers
• Outputs audio signal from BOSE speaker amp.
• Outputs low range sounds.
Satellite antenna (if so equipped)
Audio signal (satellite radio) is received and output to AV control unit.
AV-514
< SYSTEM DESCRIPTION >
[COLOR DISPLAY - W/BOSE & NAVI]
NAVIGATION SYSTEM
NAVIGATION SYSTEM
System Diagram
INFOID:0000000009471429
System Description
INFOID:0000000009471430
NOTE:
Refer to NAVI System Owner's Instruction for system operation.
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), and the 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 data, which is stored in the hard disk drive (HDD) (map-matching), and indicated on the
screen with a current-location mark.
By comparing the vehicle position detection results found by the
GPS and by map-matching, more accurate vehicle position data can
be used.
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 input signal. Therefore, the calculation may
become incorrect as the tires wear down. To prevent this, an automatic distance fine adjustment function has
been adopted.
TRAVEL DIRECTION
Change in the travel direction of the vehicle is calculated by a gyroscope (angular velocity sensor) and a GPS
antenna (GPS information). As the gyroscope and GPS antenna have both merit and demerit, input signals
from them 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.
ALNIA0424GB
SEL684V
AV
NAVIGATION SYSTEM
AV-515
< SYSTEM DESCRIPTION >
[COLOR DISPLAY - W/BOSE & NAVI]
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MAP–MATCHING
Map–matching is a function that repositions the vehicle on the road
map when a new location is judged to be the most accurate. This is
done by comparing the current vehicle position, calculated by the
method described in the position detection principle, with the road
map data around the vehicle, read from the map data stored on the
HDD.
Therefore, the vehicle position may not be corrected after the vehicle
is driven over a certain distance or time in which GPS information is
hard to receive. In this case, the current-location mark on the display
must be corrected instructionly.
CAUTION:
The road map data is based on data stored on the HDD.
• 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 current-location mark has
been repositioned.
If there is an error in distance and/or direction, the alternative
routes will be shown in different order of priority, and the wrong
road can be avoided.
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.
• Map-matching does not function correctly when the road on which
the vehicle is driving is new and not recorded on the HDD, or when
the road pattern stored in the map data and the actual road pattern
are different due to repair.
When driving on a road not present in the map, the map-matching
function may find another road and position the current-location
mark on it. Then, when the correct road is detected, the current-
location mark may leap to it.
• Effective range for comparing the vehicle position and travel direc-
tion calculated by the distance and direction with the road data
read from the HDD is limited. Therefore, when there is an exces-
sive gap between the current vehicle position and the position on
the map, correction by map-matching is not possible.
GPS (GLOBAL POSITIONING SYSTEM)
GPS (Global Positioning System) has been developed and con-
trolled by the US Department of Defense. The system utilizes GPS
satellite (NAVSTAR), sending out radio waves while flying on an orbit
around the earth at the height of approx. 21,000 km (13,000 mi).
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). If radio waves were received only from three
GPS satellites, the GPS receiver calculates the vehicle's position in
two dimensions (latitude/longitude), utilizing the altitude data calcu-
lated previously by using radio waves from four or more GPS satel-
lites (two-dimensional positioning).
Type
Advantage
Disadvantage
Gyroscope (angular velocity sensor)
• Can detect the vehicle's turning angle quite
accurately.
• Direction errors may accumulate when the ve-
hicle is driven for long distances without stop-
ping.
GPS antenna (GPS information)
• Can detect the vehicle's travel direction
(North/South/East/West).
• Correct direction cannot be detected when the
vehicle speed is low.
SEL685V
SEL686V
ALNIA0671GB
SEL526V
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