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Infiniti G35 (V35) Sedan. Manual - part 137

AV-320

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

MULTI AV SYSTEM

Part name

Description

AV CONTORL UNIT

• Integrates HDD (hard disk drive) allowing map data and music data to be

stored.

• It is the master unit of the MULTI AV system, and it is connected to each con-

trol unit by means of communication. It operates each system according to
communication signals from the AV control unit.

• The AV control unit includes the audio, hands-free phone, voice control, nav-

igation, and vehicle information functions.

• It is connected to ECM and unified meter and A/C amp. via CAN communi-

cation to obtain necessary information for the vehicle information function.

• It inputs the automatic brightness ON/OFF signals that are required for the

display dimming control.

• It inputs the signals for driving status recognition (vehicle speed, reverse and

parking brake).

• Update of map data is performed with the CONSULT-III and the applicable

cable.

DISPLAY UNIT

• Display image is controlled by the serial communication from AV control unit.
• RGB image signal is input from AV control unit (RGB, RGB area and RGB

synchronizing). Auxiliary image signal is input from the auxiliary input jack.
Camera image signal is input from camera control unit.

• Synchronize signal (HP, VP) is output to AV control unit.
• Touch panel function can be operated for each system by touching a display

directly.

BOSE AMP.

Inputs power (amp ON) and sound signal from AV control unit, and outputs
sound signal to each speaker.

FRONT DOOR WOOFER

• Outputs sound signal from BOSE amp.
• Outputs low-pitched sound.

FRONT DOOR SQUAWKER

• Outputs sound signal from BOSE amp.
• Outputs midrange sound.

REAR DOOR SPEAKER

• Outputs sound signal from BOSE amp.
• Outputs high, mid and low range sounds.

TWEETER

• Outputs sound signal from BOSE amp.
• Outputs high range sound.

CENTER SPEAKER

• Outputs sound signal from BOSE amp.
• Outputs high, mid and low range sounds.

WOOFER

• Outputs sound signal from BOSE amp.
• Outputs low-pitched sound.
• Power (amp ON signal) is supplied from BOSE amp.

MULTIFUNCTION SWITCH

• Operation panel is equipped with the centralized switch where audio, auxilia-

ry input and navigation operations are integrated.

• Connected with preset switch via cable, and operation signal is sent to AV

control unit via AV communication.

PRESET SWITCH

• Operation panel is equipped with the centralized switch where audio and air

conditioner operations are integrated.

• Connected with multifunction switch via cable, and operation signal is sent to

AV control unit via AV communication.

• The CD ejection operating signal is performed by hardwire.

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

The image of vehicle rear view is sent to camera control unit.

STEERING SWITCH

• Operations for audio, hands-free phone, audio response and navigation, etc.

are possible.

• Steering switch signal (operation signal) is output to AV control unit.

STEERING ANGLE SENSOR

Sensor signal (steering angle) is sent to camera control unit.

MULTI AV SYSTEM

AV-321

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

MICROPHONE

• Used for hands-free phone operation and audio response.
• Mic signal is sent to AV control unit
• Power (Mic VCC) is supplied from AV control unit.

AUXILIARY INPUT JACKS

Image signal of auxiliary input is sent to display, and sound signal is 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.

CD CHANGER

• Controlled by communication signal, request signal from AV control unit
• Audio signal from CD CHANGER is sent to AV control unit.

Part name

Description

AV-322

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

NAVIGATION SYSTEM

NAVIGATION SYSTEM

System Diagram

INFOID:0000000000964768

System Description

INFOID:0000000000964769

DESCRIPTION

• The AV control unit controls navigation function while GPS tuner has built in map data, GYRO (angle speed

sensor), on the HDD (Hard Disk Drive).

• The AV control unit inputs operation signal with communication signal, through display (touch panel) and

multifunction switch and steering switch.

• Guide sound is output to front speaker through BOSE amp. from AV control unit when operating navigation

system.

• A vehicle position is calculated with the GYRO (angle speed sensor), vehicle sensor, signal from GPS satel-

lite and map data stored on HDD (Hard Disk Drive), and transmits the map image signal (RGB image, RGB
area, RGB image synchronizing) to the display.

Position detection principle

The navigation system periodically calculates the current vehicle
position according to the following three types of signals
• Travel distance of the vehicle as determined by the vehicle speed

sensor

• Vehicle turning angle determined by the gyroscope (angular speed

sensor)

• The travel direction of the vehicle 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, which is stored in the HDD
(Hard Disk drive) (map-matching), and indicated on the screen with
a current location mark. More accurate data is used by comparing
position detection results from GPS to the map-matching.
The current position is calculated by detecting the travel distance
from the previous calculation point, and its direction change.
• Travel distance

The travel distance is generated from the vehicle speed sensor
input signal. The automatic distance correction function is adopted
for preventing to mis-detect the travel distance by tires' wear down
etc.

• Travel direction

The gyroscope (angular velocity sensor) and GPS antenna (GPS
information) generate the change of the travel direction. Both have
advantages and disadvantages as per the following descriptions.

JSNIA0054GB

JSNIA0177GB

SEL684V

NAVIGATION SYSTEM

AV-323

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

Input signals 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 repositions the vehicle on the road map when a new
location is judged to be more accurate. This is done by comparing
the current vehicle position (calculated by the normal position detec-
tion method) from the map data stored in the HDD (Hard Disk Drive).

There is a possibility that the vehicle position may not be corrected in the following case, and when vehicle is
driven over a certain distance or time in which GPS information is hard to receive. Correct manually the cur-
rent location mark on the screen.
• In map-matching, several alternative routes are prepared and pri-

oritized in addition to the road judged as currently driving.
Therefore, due to errors in the distance and/or direction, an incor-
rect road may be prioritized, and the current location mark may be
repositioned to the incorrect road.
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, etc.

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

vehicle is driving is new, etc. and not recorded in the map data.
Also, map-matching does not function correctly when road pattern
stored in the map data and the actual road pattern are different due
to repair, etc.
Therefore, the map-matching function judges other road as a cur-
rently driving road if the road is not in the map, and displays the
current location mark on it. Later, the current location mark may be
repositioned to the road if 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 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)

Type

Advantage

Disadvantage

Gyroscope (angular velocity
sensor)

The turning angle is precisely detected.

Errors are accumulated when driving a long dis-
tance without stopping.

GPS antenna (GPS informa-
tion)

The travel direction (North/South/East/West)
is detected.

The travel direction is not precisely detected when
driving slowly.

SEL685V

SEL686V

JSNIA0180GB

Content .. 135 136 137 138 ..