Nissan Altima L32. Instruction — part 64
AV-248
< FUNCTION DIAGNOSIS >
[BOSE AUDIO WITH NAVIGATION]
MULTI AV SYSTEM (SEDAN)
Component Description
INFOID:0000000004206531
AWNIA0761ZZ
1.
Tweeter LH M51
2.
Steering wheel audio control switches 3.
CD changer M42
4.
Tweeter RH M52
5.
AV control unit M46, M47, M48, M81,
M90, M91
6.
Center speaker M151
7.
Combination meter M24
8.
Front door speaker
LH D3
RH D103
9.
Rear subwoofer RH B124
10. Rear subwoofer LH B120
11. Rear door speaker
LH D202
RH D302
12. Antenna amp M502 (view with rear pil-
lar finisher RH removed)
13. BOSE speaker amp. B121, B122
14. Microphone R7
15. Rear view camera control unit B31
(view with trunk side finisher LH re-
moved)
16. Rear view camera B35
Part name
Description
AV control unit
• Integrates DVD-ROM drive allowing map data to be stored
• The AV control unit includes the navigation, audio, hands-free phone, satel-
lite radio and display functions
BOSE speaker amp.
Receives power (amp ON) and audio signals from AV control unit, and outputs
audio signals to each speaker.
CD changer
Outputs audio signals to AV control unit.
Front door speaker
• Outputs audio signal from BOSE speaker amp.
• Outputs high, mid and low range sounds
Tweeter
• Outputs audio signal from BOSE speaker amp.
• Outputs high range sound
Center speaker
• Outputs audio signal from BOSE speaker amp.
• Outputs high, mid and low range sounds
Rear door speaker
• Outputs audio signal from BOSE speaker amp.
• Outputs high, mid and low range sounds
Rear subwoofer
• Outputs audio signal from BOSE speaker amp.
• Outputs low range sound
Rear view camera control unit
• Camera image signal is input from rear view camera, and camera image is
indicated on the display
• Power (camera ON signal) is sent to rear view camera
• Controlled by AV communication sent from AV control unit
• AV control unit recognizes the presence of camera system with camera con-
nection recognition signal
Rear view camera
• Receives camera ON signal from rear view camera control unit
• Sends image signal to rear view camera control unit
AV
MULTI AV SYSTEM (SEDAN)
AV-249
< FUNCTION DIAGNOSIS >
[BOSE AUDIO WITH NAVIGATION]
C
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Steering wheel audio control switches
• Operations for audio, hands-free phone and navigation are possible
• Steering switch signal (operation signal) is output to AV control unit
Microphone
Voice signals are received and sent to AV control unit.
GPS antenna
GPS signal is received and sent to AV control unit.
Antenna amp.
• Radio signal received by glass antenna is amplified and sent to AV control
unit
• Power (antenna amp ON signal) is supplied from AV control unit
Satellite radio antenna
Satellite radio signal is received and sent to AV control unit.
Part name
Description
AV-250
< FUNCTION DIAGNOSIS >
[BOSE AUDIO WITH NAVIGATION]
NAVIGATION SYSTEM (COUPE)
NAVIGATION SYSTEM (COUPE)
System Diagram
INFOID:0000000004206532
System Description
INFOID:0000000004206533
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 sen-
sor), 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 DVD-
ROM, which is stored in the DVD-ROM drive (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
AWNIA0053GB
AWNIA0054GB
SEL684V
AV
NAVIGATION SYSTEM (COUPE)
AV-251
< FUNCTION DIAGNOSIS >
[BOSE AUDIO WITH NAVIGATION]
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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.
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 DVD-ROM stored in
the DVD-ROM drive.
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 in the map DVD-
ROM.
• 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 in the map DVD-
ROM, 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 map DVD-ROM is limited. Therefore, when there is
an excessive gap between the current vehicle position and the
position on the map, correction by map-matching is not possible.
GPS (GLOBAL POSITIONING SYSTEM)
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
SKIA0613E
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