Audio, Visual & Navigation System (Without Navigation): Overview — Infiniti FX35 II рестайлинг (2011-2013)

Component Description

Part name	Description
AV control unit	Integrates flash memory allowing 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 signals from the AV control unit. The AV control unit includes the audio, USB connection 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 is connected to BCM via CAN communication transmitting/receiving for the vehicle settings 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 parking brake). TEL voice signal and voice guidance signal are input from TEL adapter unit.
Front display unit	Front display image is controlled by the serial communication from AV control unit. It receives the power (signal VCC and inverter VCC) from the AV control unit and operates. RGB image signal is input from AV control unit (RGB, RGB area and RGB synchronizing). Composite image signals (camera images) are input from AV control unit. Synchronizing signal (HP, VP) is output to AV control unit.
BOSE amp.	Inputs sound signal from AV control unit, and outputs sound signal to each speaker. Inputs 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 signal) and sound signal from BOSE amp. Outputs low range sound.
Multifunction switch	Operation panel is equipped with the centralized switch where audio, 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 conditioner, 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.
Rear view camera	Camera power supply is input from AV control unit. The image of vehicle rear view is transmitted to AV control unit.
Steering switch	Operations for audio and hands-free phone are possible. Steering switch signal (operation signal) is output to AV control unit.
Microphone	Used for hands-free phone operation. Microphone signal is transmitted to TEL adapter unit. Power (Microphone VCC) is supplied from TEL adapter unit.
USB connector	Sound signal of USB input is transmitted to AV control unit.
Antenna base	An 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 the satellite radio waves and outputs it to satellite radio tuner.
Satellite radio tuner	Inputs the satellite radio signal from satellite radio antenna and outputs the sound signal to the AV control unit. It is controlled with the AV control unit and serial communication (communication signal and request signal).
TEL adapter unit	Inputs the TEL voice signal from TEL antenna and outputs it to the AV control unit. It is connected with the AV control unit via AV communication and controlled with the AV control unit.
TEL antenna	Receives the TEL voice signal and outputs it to the TEL adapter unit.

Scheme 107

Scheme 107: MULTI AV SYSTEM: System Diagram

Note. The name MULTIFUNCTION SWITCH indicates the integration of PRESET SWITCH and MULTIFUNCTION SWITCH virtually. An antenna base integrated with radio antenna and satellite radio antenna is adopted.

Scheme 108

MULTI AV SYSTEM: System Description

Multi AV system means that the following systems are integrated

FUNCTION NAME
Audio function
Hands-free phone function
Rear view monitor function
Vehicle information function

Description

The trouble diagnosis function has a self-diagnosis mode for conducting trouble diagnosis automatically and a confirmation/adjustment mode for operating manually.
Self-diagnosis mode performs the AV control unit diagnosis and the connection diagnosis between each of the units that make up the system, and it indicates the results to the front display unit.
The confirmation/adjustment mode allows the technician to check, modify or adjust the vehicle signals and set values, as well as to monitor the system error records and system communication status. The checking, modifying or adjusting generally require human intervention and judgment (the system cannot make judgment automatically).

Mode		Description
Self Diagnosis		AV control unit diagnosis. Diagnoses the connections across system components, between AV control unit and each unit.
Confirmation/Adjustment	Display Diagnosis	The following check functions are available: color tone check by color bar display and white display, light and shade check by gray scale display.
	Vehicle Signals	Diagnosis of signals can be performed for vehicle speed, parking brake, lights, ignition and reverse.
	Speaker Test	The connection of a speaker can be confirmed by test tone.
	Climate Control	Start auto air conditioner system self-diagnosis.
	Error History	The system malfunction and the frequency when occurring in the past are displayed. When the malfunctioning item is selected, the time and place that the selected malfunction last occurred are displayed.
	Camera Cont.	Guiding line position that overlaps rear view camera image can be adjusted. Configuration stored in the AV control unit can be checked.
	Vehicle CAN Diagnosis	The transmitting/receiving of CAN communication can be monitored.
	AV COMM Diagnosis	The communication condition of each unit of Multi AV system can be monitored.
	Delete Unit Connection Log	Erase the connection history of unit and error history.
	Initialize Settings	Initializes the AV control unit memory.

ON BOARD DIAGNOSIS ITEM LIST

Scheme 109

Scheme 109: STARTING PROCEDURE

Start the engine.
Turn the audio system OFF.
While pressing the "SETTING" button, turn the volume control dial clockwise or counterclockwise for 40 clicks or more. (When the self-diagnosis mode is started, a short beep will be heard.) Shifting from current screen to previous screen is performed by pressing "BACK" button.
The trouble diagnosis initial screen is displayed, and then the items of "Self Diagnosis" and "Confirmation/Adjustment" can be selected.

Scheme 110

ECU IDENTIFICATION

The part number of AV control unit is displayed.

CONFIGURATION (AV CONTROL UNIT): Description

Since vehicle specifications are not included in the AV control unit after replacement, it is required to write vehicle specifications with CONSULT.
The AV control unit configuration includes functions as follows

Function		Description
Read/Write Configuration	Before Replace ECU	Allows the reading of vehicle specification written in AV control unit to store the specification in CONSULT.
Read/Write Configuration	After Replace ECU	Allows the writing of the vehicle information stored in CONSULT into the AV control unit.
Manual Configuration		Allows the writing of the vehicle specification into the AV control unit by hand.

CAN (Controller Area Network) is a serial communication line for real-time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independently). In CAN communication, control units are connected with 2 communication lines (CAN-H, CAN-L) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Signal Chart. Refer to " CAN COMMUNICATION SIGNAL CHART ".

U1300 is indicated when malfunction occurs in communication signal of multi AV system. Indicated simultaneously, without fail, with the malfunction of control units connected to AV control unit with communication line. Determine the possible malfunction cause from the table below.

Transmit the image displayed with AV control unit with RGB signal to the front display unit.

Scheme 111

Scheme 111: Diagnosis Procedure

CHECK CONTINUITY RGB (R: RED) SIGNAL CIRCUIT Turn ignition switch OFF. Disconnect front display unit connector and AV control unit connector. Check continuity between front display unit harness connector and AV control unit harness connector. Front display unit AV control unit Continuity Connector Terminal Connector Terminal M194 17 M202 43 Existed Check continuity between front display unit harness connector and ground. Front display unit Ground Continuity Connector Terminal M194 17 Not existed Is the inspection result normal? YES: GO TO 2. NO: Repair harness or connector.
CHECK RGB (R: RED) SIGNAL Connect front display unit connector and AV control unit connector. Turn ignition switch ON. Check signal between front display unit harness connector and ground. (+) (-) Condition Reference value Front display unit Connector Terminal M194 17 Ground Start confirmation/adjustment mode, and then display color bar by selecting "Color Spectrum Bar" on DISPLAY DIAGNOSIS screen. Is the inspection result normal? YES: Replace front display unit. Refer to " «EXPLODED VIEW»(ref-524059-S32556523132013012500000) ". NO: Replace AV control unit. Refer to " «EXPLODED VIEW»(ref-524059-S32709120162013012500000) ".

Transmit the image displayed with AV control unit with RGB signal to the front display unit.

Scheme 112

Scheme 112: Diagnosis Procedure

CHECK CONTINUITY RGB (B: BLUE) SIGNAL CIRCUIT Turn ignition switch OFF. Disconnect front display unit connector and AV control unit connector. Check continuity between front display unit harness connector and AV control unit harness connector. Front display unit AV control unit Continuity Connector Terminal Connector Terminal M194 18 M202 45 Existed Check continuity between front display unit harness connector and ground. Front display unit Ground Continuity Connector Terminal M194 18 Not existed Is the inspection result normal? YES: GO TO 2. NO: Repair harness or connector.
CHECK RGB (B: BLUE) SIGNAL Connect front display unit connector and AV control unit connector. Turn ignition switch ON. Check signal between front display unit harness connector and ground. (+) (-) Condition Reference value Front display unit Connector Terminal M194 18 Ground Start confirmation/adjustment mode, and then display color bar by selecting "Color Spectrum Bar" on DISPLAY DIAGNOSIS screen. Is the inspection result normal? YES: Replace front display unit. Refer to " «EXPLODED VIEW»(ref-524059-S32556523132013012500000) ". NO: Replace AV control unit. Refer to " «EXPLODED VIEW»(ref-524059-S32709120162013012500000) ".

Transmit the RGB synchronizing signal to the front display unit so as to synchronize the RGB image displayed with AV control unit.

Transmits the display area of RGB image displayed by AV control unit with RGB area (YS) signal to front display unit.

In composite image (camera image), transmit the vertical synchronizing (VP) signal and horizontal synchronizing (HP) signal from front display unit to AV control unit so as to synchronize the RGB images displayed with AV control unit such as the image quality adjusting menu, etc.

AV control unit outputs camera power supply to rear view camera and inputs rear view camera image signal from rear view camera when the reverse signal is input.
The AV control unit that inputs the camera image signal transmits the camera image signal to the front display unit.

The disk eject signal is output to AV control unit when the eject switch of multifunction switch is pressed.

AV control unit that inputs the camera image signal transmits the composite image signal to the front display unit.

Supply power from TEL adapter unit to microphone. The microphone transmits the sound/voice to the microphone.

TEL adapter unit identifies the vehicle model according to the control signal and performs the control.

AV control unit transmits the mode change signal to BOSE amp.
Driver's Audio Stage controls the speaker's output characteristic by BOSE amp. so that the driver's seat is to be the center of sounds.

Satellite radio tuner and AV control unit are connected with a serial communication. They transmit the operation signal from AV control unit to satellite radio tuner, and transmit the display signal from satellite radio tuner to AV control unit.

Request signal transmits the signal to recognize the connection of satellite radio tuner from satellite radio tuner to AV control unit.

Transmits the steering switch signal to AV control unit.

OPERATION

Symptoms	Check items	Probable malfunction location
Multifunction switch and preset switch operation does not work.	All switches cannot be operated. "MULTI AV" is displayed on system selection screen when the CONSULT is started.	Multifunction switch power supply and ground circuit. AV communication circuit between AV control unit and multifunction switch. Perform CONSULT self-diagnosis. Refer to " CONSULT FUNCTION (MULTI AV) ".
	All switches cannot be operated. "MULTI AV" is not displayed on system selection screen when the CONSULT is initialized.	AV control unit power supply and ground circuit malfunction. Refer to " AV CONTROL UNIT: DIAGNOSIS PROCEDURE ".
	Only specified switch cannot be operated.	Multifunction switch or preset switch malfunction. Perform multifunction switch and preset switch self-diagnosis function. Refer to " ON BOARD DIAGNOSIS FUNCTION ".
Fuel economy display is abnormal.	There is malfunction in the CONSULT "self-diagnosis result" of "MULTI AV". Refer to " CONSULT FUNCTION (MULTI AV) ".	Perform detected DTC diagnosis. Refer to " DTC INDEX ".
Fuel economy display is abnormal.	There is no malfunction in the CONSULT "self-diagnosis result" of "MULTI AV". Refer to " CONSULT FUNCTION (MULTI AV) ".	Ignition signal circuit malfunction. (AV control unit)

BASIC OPERATIONS

Symptom	Possible cause	Possible solution
No image is displayed.	The brightness is at the lowest setting.	Adjust the brightness of the display.
	The systems in the video mode.	Press "DISC-AUX" to change the mode.
	The display is turned off.	Press " DAY/NIGHT OFF" switch to turn on the display.
The screen is too dim. The movement is slow.	The temperature in the interior of the vehicle is low.	Wait until the interior of the vehicle has warmed up.
Some pixels in the display are darker or brighter than others.	This condition is an inherent characteristic of liquid crystal displays.	This is not a malfunction.
Some menu items cannot be selected.	Some menu items become unavailable while the vehicle is driven.	Park the vehicle in a safe location, and then operate the multi AV system.

Audio, Visual & Navigation System (Without Navigation): Overview Infiniti FX35 II рестайлинг