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Nissan Pathfinder (2009 year). Manual - part 62

AV-308

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

AUDIO SYSTEM

FUNCTION DIAGNOSIS

AUDIO SYSTEM

System Diagram

INFOID:0000000003939153

System Description

INFOID:0000000003939154

AUDIO SYSTEM

AWNIA1786GB

2009 Pathfinder

AUDIO SYSTEM

AV-309

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

The audio system consists of the following components
• AV control unit
• Display unit
• BOSE speaker amp.
• Window antenna
• Steering wheel audio control switches
• A/C and AV switch assembly
• Front door speakers
• Front tweeters
• Rear door speakers
• Rear tweeters
• Subwoofer
When the audio system is on, radio signals are received by the window antenna. The AV control unit then
sends audio signals to the BOSE speaker amp. The BOSE speaker amp. amplifies the audio signals before
sending them to the front door speakers, front tweeters, rear door speakers, rear tweeters and the subwoofer.
Refer to Owner's Manual for audio system operating instructions.

SATELLITE RADIO SYSTEM

The satellite radio system consists of the following components
• Satellite antenna
• AV control unit
When the satellite radio system is on, radio signals are supplied to the AV control unit from the satellite
antenna. The AV control unit then sends audio signals to the BOSE speaker amp.
Refer to Owner's Manual for satellite radio system operating instructions.

SPEED SENSITIVE VOLUME SYSTEM

Volume level of this system goes up and down automatically in proportion to the vehicle speed. The control
level can be selected by the customer. Refer to Owner's Manual for operating instructions.

2009 Pathfinder

AV-310

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

AUDIO SYSTEM

Component Parts Location

INFOID:0000000003939155

Steering wheel audio control switch-
es

Front tweeter LH M109

AV control unit M23, M37, M39, M44,
M48, M71, M72

A/C and AV switch assembly M98

Display unit M92

Front tweeter RH M111

AWNIA1814ZZ

2009 Pathfinder

AUDIO SYSTEM

AV-311

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

Component Description

INFOID:0000000003939156

Aux. jack M85

Compact Flash insert slot

Front door speaker
LH D12
RH D112

10. Rear door speaker

LH D207
RH D307

11. Rear tweeter

LH D208
RH D308

12. Subwoofer B72

13. BOSE speaker amp B74, B75 (locat-

ed under driver seat)

14. Rear camera control unit B176 (locat-

ed behind luggage finisher RHl)

15. Rear view camera D551

16. Microphone R8

Part name

Description

AV control unit

Controls audio system and satellite radio system functions

Display unit

• Touch screen controls all audio and A/C operations
• 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 wheel audio control 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

Front tweeters

• 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 tweeters

• Outputs audio signal from BOSE speaker amp.
• Outputs high range sounds

Subwoofer

• Outputs audio signal from BOSE speaker amp.
• Outputs low range sounds

Satellite antenna

Audio signal (satellite radio) is received and output to AV control unit.

2009 Pathfinder

AV-312

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

NAVIGATION SYSTEM

NAVIGATION SYSTEM

System Diagram

INFOID:0000000003939157

System Description

INFOID:0000000003939158

NOTE:
Refer to NAVI System Owner's Manual 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

2009 Pathfinder

NAVIGATION SYSTEM

AV-313

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

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 manually.

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 miles).
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

ALNIA0839GB

SEL526V

2009 Pathfinder

AV-314

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

NAVIGATION SYSTEM

Accuracy of the GPS will deteriorate under the following conditions.
• In two-dimensional positioning, the GPS accuracy will deteriorate when the altitude of the vehicle position

changes.

• There may be an error of approximately 10 m (30 ft.) in position detected by three-dimensional positioning,

which is more accurate than two-dimensional positioning. The accuracy can be even lower depending on the
arrangement of the GPS satellites utilized for the positioning.

• Position detection is not possible when the 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.

• Position correction by GPS is not available while the vehicle is stopped.

2009 Pathfinder

NAVIGATION SYSTEM

AV-315

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

Component Parts Location

INFOID:0000000004432039

Steering wheel audio control switch-
es

Front tweeter LH M109

AV control unit M23, M37, M39, M44,
M48, M71, M72

A/C and AV switch assembly M98

Display unit M92

Front tweeter RH M111

ALNIA0562GB

2009 Pathfinder

Content .. 60 61 62 63 ..