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Infiniti FX35, FX50 (S51). Manual - part 97

COMPONENT PARTS

AV-161

< SYSTEM DESCRIPTION >

[NAVIGATION (SINGLE MONITOR)]

Component Description

INFOID:0000000005475011

25. Preset switch

26.

Sonar control unit (with around view
monitor)

27. Auxiliary input jack

28. USB connector

29. AV control unit

30. Multifunction switch

31. Microphone

Under front seat (LH side)

Luggage floor (LH side)

Instrument panel rear side

Console pocket assembly removed
condition

Part name

Description

AV control unit

• Integrates hard disk drive (HDD) 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 control

unit by communication. It operates each system according to communication sig-
nals from the AV control unit.

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

tion, USB connection, DVD play, satellite radio and vehicle information functions.

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

to obtain necessary information for the vehicle information function.

• It inputs the illumination signals that are required for the display dimming control.
• It inputs the signals for driving status recognition (vehicle speed, reverse and park-

ing brake).

• The RGB digital image signal and composite image signal are output to front dis-

play unit.

• Amp. ON signal, sound signal and mode change signal transmitted to BOSE amp.
• Update of map data is performed with the DVD-ROM.

Front display unit

• Front display image is controlled by the serial communication from AV control unit.
• RGB digital image signal is input from AV control unit.
• Composite image signal is input from AV control unit.
• Camera image signal is input from around view monitor control unit.
• Touch panel function can be operated for each system by touching a display di-

rectly.

BOSE amp.

• Inputs sound signal from AV control unit, and outputs sound signal to each speak-

er.

• Input mode change signal from AV control unit.

Front door speaker

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

Rear door speaker

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

Front squawker

• Outputs sound signal from BOSE amp.
• Outputs mid range sounds.

Rear squawker

• Outputs sound signal from BOSE amp.
• Outputs mid range sounds.

Center speaker

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

Woofer

• Inputs power (woofer amp. ON) and sound signal from BOSE amp.
• Outputs low range sounds.

Multifunction switch

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

put and navigation, etc. operations are integrated.

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

control unit via AV communication.

Preset switch

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

ditioner, etc. operations are integrated.

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

to AV control unit via AV communication.

• The disk ejection operating signal is performed by hardwire.

AV-162

< SYSTEM DESCRIPTION >

[NAVIGATION (SINGLE MONITOR)]

COMPONENT PARTS

*1: Image signals cannot be received from iPod

Around view monitor control unit

• It supplies power to front camera, rear camera, and side camera. And then it su-

perimposes the images from each camera and outputs them to front display unit.

• Superimpose the guiding line, predicted course line and sonar indicator to the

camera image that outputs to front display unit.

• It performs the reception/transmission of communication signal with each camera.
• It transmits the sonar operation signal from sonar control unit and receives the so-

nar information from sonar control unit via AV communication.

• It transmits the information received/transmitted with sonar control unit via AV

communication to AV control unit.

Front camera

• It inputs the power supply from around view monitor control unit and outputs the

image of the vehicle front to around view monitor control unit.

• It performs the reception/transmission of the communication signal with around

view monitor control unit.

Rear camera

• It inputs the power supply from around view monitor control unit and outputs the

image of the vehicle rear to around view monitor control unit.

• It performs the reception/transmission of the communication signal with around

view monitor control unit.

Side camera LH

• It inputs the power supply from around view monitor control unit and outputs the

image of the vehicle LH to around view monitor control unit.

• It performs the reception/transmission of the communication signal with around

view monitor control unit.

Side camera RH

• It inputs the power supply from around view monitor control unit and outputs the

image of the vehicle RH to around view monitor control unit.

• It performs the reception/transmission of the communication signal with around

view monitor control unit.

Infrared LED
(Auxiliary lighting)

• It illuminates around the front RH wheel by the power supply from around view

monitor control unit to improve nighttime visibility of front-side view.

• The infrared LED is an invisible light ray.

Sonar control unit

• It is connected with around view monitor control unit via AV communication and

receives the sonar operation signal from around view monitor control unit.

• It transmits the sonar detection status to around view monitor control unit via AV

communication.

• It judges the warning level according to the signal from corner sensor.

Corner sensor

The obstacle distance is detected. The signal is transmitted to sonar control unit.

Steering switch

• Operations for audio, hands-free phone, voice control and navigation, etc. are pos-

sible.

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

Microphone

• Used for hands-free phone operation and voice recognition.
• Microphone signal is transmitted to AV control unit.
• Power (Microphone VCC) is supplied from AV control unit.

Auxiliary input jacks

Image signal and sound signal of auxiliary input is transmitted to AV control unit.

GPS antenna

GPS signal is received and transmitted to AV control unit.

Antenna base

A radio antenna base integrated with radio antenna amp. and satellite radio antenna
is adopted.

ANTENNA AMP.

• Radio signal received by rod antenna is amplified and transmitted to AV control

unit.

• Power (antenna amp. ON signal) is supplied from AV control unit.

SATELLITE RADIO ANTENNA

• Receives satellite radio waves and outputs it to AV control unit.

USB connector

Image signal

and sound signal of USB input is transmitted to AV control unit.

Part name

Description

SYSTEM

AV-163

< SYSTEM DESCRIPTION >

[NAVIGATION (SINGLE MONITOR)]

SYSTEM

MULTI AV SYSTEM

MULTI AV SYSTEM : System Diagram

INFOID:0000000005475008

NOTE:
• The name MULTIFUNCTION SWITCH indicates the integration of PRESET SWITCH and MULTIFUNCTION

SWITCH virtually.

• An antenna base integrated with antenna amp. is adopted.

MULTI AV SYSTEM : System Description

INFOID:0000000005475009

Multi AV system means that the following systems are integrated.

COMMUNICATION SIGNAL

• AV control unit function by transmitting/receiving data one by one with each unit (slave unit) that configures

them completely as a master unit by connecting between units that configure MULTI AV system with two AV
communication lines (H, L).

• Two AV communication lines (H, L) adopt a twisted pair line that is resistant to noise.

JSNIA2454GB

FUNCTION NAME

Navigation system function

Audio function

DVD play function

Hands-free phone function

Auxiliary input function

USB connection function

Voice recognition function

Touch panel function

Around view monitor function

Camera assistance sonar system

Vehicle information function

AV-164

< SYSTEM DESCRIPTION >

[NAVIGATION (SINGLE MONITOR)]

SYSTEM

• AV control unit is connected by CAN communication, and it receives data signal from ECM, unified meter

and A/C amp. It computes and displays fuel economy information value with the obtained information.

• AV control unit is connected with display and serial communication, and it transmits the required signal of

display and display control and receives the response signal from display.

NAVIGATION SYSTEM FUNCTION

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 a miss-detection of the travel distance because of
tire wear 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.

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

JSNIA0177GB

SEL684V

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.

Content .. 95 96 97 98 ..