2011 INFINITI QX56 phone

AV-4
Diagnosis Procedure .............................................177
MICROPHONE SIGNAL CIRCUIT ..................178
Description ........................................................... ..178
Diagnosis Procedure .............................................178
CAMERA IMAGE SIGNAL CIRCUIT ...............180
Description ........................................................... ..180
Diagnosis Procedure .............................................180
FRONT CAMERA COMMUNICATION SIG-
NAL CIRCUIT ..................................................
181
Description ........................................................... ..181
Diagnosis Procedure .............................................181
FRONT CAMERA IMAGE SIGNAL CIRCUIT .182
Description .............................................................182
Diagnosis Procedure .............................................182
REAR CAMERA COMMUNICATION SIGNAL
CIRCUIT ...........................................................
184
Description ........................................................... ..184
Diagnosis Procedure .............................................184
REAR CAMERA IMAGE SIGNAL CIRCUIT ...185
Description ........................................................... ..185
Diagnosis Procedure .............................................185
SIDE CAMERA LH COMMUNICATION SIG-
NAL CIRCUIT ..................................................
187
Description ........................................................... ..187
Diagnosis Procedure .............................................187
SIDE CAMERA LH IMAGE SIGNAL CIRCUIT .188
Description ........................................................... ..188
Diagnosis Procedure .............................................188
SIDE CAMERA RH COMMUNICATION SIG-
NAL CIRCUIT ..................................................
190
Description ........................................................... ..190
Diagnosis Procedure .............................................190
SIDE CAMERA RH IMAGE SIGNAL CIRCUIT .191
Description ........................................................... ..191
Diagnosis Procedure .............................................191
STEERING SWITCH SIGNAL A CIRCUIT ......193
Description ........................................................... ..193
Diagnosis Procedure .............................................193
Component Inspection ...........................................193
STEERING SWITCH SIGNAL B CIRCUIT ......195
Description ........................................................... ..195
Diagnosis Procedure .............................................195
Component Inspection ...........................................195
STEERING SWITCH GROUND CIRCUIT .......197
Description ........................................................... ..197
Diagnosis Procedure .............................................197
Component Inspection ...........................................197
SYMPTOM DIAGNOSIS ............................199
MULTI AV SYSTEM SYMPTOMS .................. ..199
Symptom Table .................................................... .199
NORMAL OPERATING CONDITION ...............206
Description ........................................................... .206
REMOVAL AND INSTALLATION .............212
AV CONTROL UNIT ....................................... ..212
Removal and Installation ...................................... .212
FRONT DISPLAY UNIT ....................................213
Removal and Installation ...................................... .213
HEADREST DISPLAY UNIT ............................214
Exploded View ..................................................... .214
Removal and Installation .......................................214
VIDEO DISTRIBUTOR .....................................215
Removal and Installation ...................................... .215
FRONT DOOR SPEAKER ................................216
Removal and Installation ...................................... .216
REAR DOOR SPEAKER ..................................217
Removal and Installation ...................................... .217
SQUAWKER .....................................................218
Removal and Installation ...................................... .218
REAR DOOR TWEETER ..................................219
Removal and Installation ...................................... .219
ROOF SPEAKER .............................................220
Removal and Installation ...................................... .220
CENTER SPEAKER ....................................... ..221
Removal and Installation ...................................... .221
WOOFER ..........................................................222
Removal and Installation ...................................... .222
BOSE AMP. ......................................................223
Removal and Installation ...................................... .223
ANTENNA AMP. ............................................. ..224
Removal and Installation ...................................... .224
SATELLITE RADIO ANTENNA .......................225
Exploded View ..................................................... .225
Removal and Installation .......................................225
Disassembly and Assembly ..................................225
MULTIFUNCTION SWITCH .............................226
Removal and Installation ...................................... .226
PRESET SWITCH ........................................... ..227
Removal and Installation ...................................... .227
FRONT AUXILIARY INPUT JACKS ................228
Removal and Installation ...................................... .228
REAR AUXILIARY INPUT JACKS ...................229
Removal and Installation ...................................... .229
Revision: 2010 May2011 QX56

AV
AV-5
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USB CONNECTOR ........................................ ..230
Removal and Installation ..................................... ..230
MICROPHONE .................................................231
Removal and Installation ..................................... ..231
GPS ANTENNA ................................................232
Removal and Installation ..................................... ..232
AROUND VIEW MONITOR CONTROL UNIT ..233
Removal and Installation .......................................233
FRONT CAMERA .............................................234
Removal and Installation ..................................... ..234
REAR CAMERA ...............................................235
Removal and Installation ..................................... ..235
SIDE CAMERA ................................................236
Removal and Installation ..................................... ..236
STEERING ANGLE SENSOR .........................237
Exploded View .......................................................237
Removal and Installation .......................................237
SONAR CONTROL UNIT ................................238
Removal and Installation .......................................238
SONAR SENSOR ............................................239
Removal and Installation .......................................239
ANTENNA FEEDER ........................................240
Feeder Layout .......................................................240
Revision: 2010 May2011 QX56

AV-10
< SYSTEM DESCRIPTION >
COMPONENT PARTS
Component Description
INFOID:0000000006216214
1. Squawker RH 2. Center speaker 3. Corner sensor front RH
4. Squawker LH 5. Front camera 6. Corner sensor front LH
7. Side camera LH 8. Front door speaker LH 9. Headrest display unit LH
10. Rear door tweeter LH 11. Rear door speaker LH 12. Roof speaker LH
13. Woofer 14. Corner sensor rear LH 15. Satellite radio antenna
16. Rear camera 17. Corner sensor rear RH 18. BOSE amp.
19. Roof speaker RH 20. Antenna amp. 21. Rear door speaker RH
22. Rear door tweeter RH 23. Headrest display unit RH 24. Front door speaker RH
25. Side camera RH and infrared LED
(auxiliary lighting) 26. Front display unit 27. Steering switch
28. Sonar control unit 29. Steering angle sensor 30. Preset switch
31. Around view monitor control unit 32. USB connector 33. Front auxiliary input jacks
34. Rear auxiliary input jacks 35. AV control unit 36. Video distributor
37. Multifunction switch 38. GPS antenna 39. Microphone A. Luggage side lower finisher LH re-
moved condition B.Luggage side lower finisher RH re-
moved condition C.Headlining assembly removed condi-
tion
D. Instrument lower
panel LH removed
condition E. Spiral cable part F. Cluste
r lid C removed condition
G. Within center console H. Instrument panel rear side
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, navigation, USB con- nection, DVD play and vehicle information functions.
 It is connected to ECM and combination meter via CAN communication to obtain
necessary information for the vehicle information function.
 It inputs the illumination signals that are required for the front display dimming con- trol.
 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.
 Switches image and sound output to video distributor, inputting image switch sig- nal from headrest display unit via AV communication.
 Amp. ON 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.
Headrest display unit  Composite image signal [USB (video data), DVD and auxiliary input images] is in-
put from the video distributor.
 It receives the DVD/AUX/USB sound signal from the video distributor, and then transmits it to the headphones.
 Outputs image switch signal to video distributor via hard wire, according to rear seat remote controller operation.
 Outputs image switch signal to AV control unit via AV communication, according to
rear seat remote controller operation.
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AV
COMPONENT PARTSAV-11
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Video distributor  It receives the image signal and sound signal from the AV control unit and then
transmits it to the headrest display unit.
 It receives the image signal and sound signal from the auxiliary input jacks and then transmits it to the headrest display unit.
 Switches image and sound output to headrest display unit, inputting image switch
signal from headrest display unit via hard wire.
Front auxiliary input jacks Image signal and sound signal of auxiliary input is transmitted to AV control unit.
Rear auxiliary input jacks
(Mobile entertainment system) Image signal and sound signal of auxiliary input is transmitted to video distributor.
BOSE amp. Inputs sound signal from AV control unit, and outputs sound signal to each speaker.
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.
Squawker  Outputs sound signal from BOSE amp.
 Outputs high and mid range sounds.
Rear door tweeter  Outputs sound signal from BOSE amp.
 Outputs high range sounds.
Roof speaker  Outputs sound signal from BOSE amp.
 Outputs high and mid range sounds.
Center speaker  Outputs sound signal from BOSE amp.
 Outputs high and mid range sounds.
Woofer  Outputs 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 hardwire 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 hardwire, and operation signal is transmit- ted to AV control unit via AV communication.
 The disk ejection operating signal is performed by hardwire.
Steering switch  Operations for audio, hands-free phone and navigation, etc. are possible.
 Steering switch signal (operation signal) is output to AV control unit.
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.
Part name Description
Revision: 2010 May2011 QX56

AV-12
< SYSTEM DESCRIPTION >
COMPONENT PARTS
*1: Image signals cannot be received from iPod®.
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 angle sensor It is connected to the AV control unit and transmits the steering angle sensor signal
via CAN communication.
Microphone  Used for hands-free phone operation.
 Microphone signal is transmitted to AV control unit.
 Power (Microphone VCC) is supplied from AV control unit.
GPS antenna GPS signal is received and transmitted to AV control unit.
Satellite radio antenna Receives the satellite radio waves and outputs it to AV control unit.
Antenna amp.  Radio signal received by glass antenna (main) is amplified and transmitted to AV
control unit.
 Power (antenna amp. ON signal) is supplied from AV control unit.
USB connector Image signal
*1 and sound signal of USB input is transmitted to AV control unit.
Part name Description
Revision: 2010 May2011 QX56

AV-14
< SYSTEM DESCRIPTION >
SYSTEM
MULTI AV SYSTEM : System Description
INFOID:0000000006216216
Multi AV system means that the following systems are integrated.
COMMUNICATION SIGNAL
 AV control unit function by transmitting/receiving dat a 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.
 AV control unit is connected by CAN communication, and it receives data signal from ECM and combination
meter It computes and displays fuel economy information value with the obtained information. Transmitting/
receiving of data signal is performed by BCM. Also, it transmits the required signal of vehicle setting and
receives the response signal.
 AV control unit is connected with front display unit and serial communication, and it transmits the required
signal of display and display control and receives the response signal from front display unit.
NAVIGATION SYSTEM FUNCTION
Description
 The AV control unit controls navigation function whil e 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 am p. from AV control unit when operating navigation
system.
 A vehicle position is calculated with the GYRO (angl e 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 v ehicle 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.
FUNCTION NAME
Navigation system function Audio function
DVD play function
Front auxiliary input function USB connection function
Mobile entertainment system Hands-free phone function Touch panel function
Around view monitor function
Camera assistance sonar system Vehicle information function
Auto Light adjustment system
JSNIA0177GB
Revision: 2010 May2011 QX56

AV
SYSTEMAV-17
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 Operating signal is transmitted to AV control unit wit h AV communication when it is operated by multifunction
switch or preset switch. The disk ejection operating signal is performed by hardwire.
 Operating signal is transmitted to AV control unit with steering switch signal when it is operated by steering
switch.
Screen Display
Switching of display is performed with serial comm unication between front display unit and AV control unit.
AM/FM Radio Mode
 AM/FM radio tuner is built into AV control unit.
 AM/FM radio wave is received by radio antenna, next it is amplified by antenna amp., and finally it is input to
AV control unit.
 FM radio wave is received by FM sub antenna, and it is transmitted to the AV control unit directly.
 Audio signal is input to BOSE amp. and BOSE amp. outputs to each speaker.
Satellite Radio Mode
 Satellite radio tuner is built into AV control unit.
 Sound signal (satellite radio) is received by satel lite radio antenna and transmitted to AV control unit. AV
control unit outputs sound signal to BOSE amp. The si gnal is also outputted from BOSE amp. to each
speaker.
CD Mode
 CD function is built into AV control unit.
 AV control unit outputs audio signal to BOSE amp., and BOSE amp. outputs to each speaker when CD is
inserted to AV control unit.
Bluetooth™ Audio Mode
 Bluetooth™ audio function is built into AV control unit.
 Bluetooth
™ audio can play music data in the portable audio by means of Bluetooth™ communications
between the portable audio and the AV control unit.
 AV control unit outputs audio signal to BOSE amp., and BOSE amp. outputs to each speaker.
Music Box Mode
 Music CD data is stored on HDD that is built into AV control unit, and it can be played.
 AV control unit outputs music (sound signal) that is stored on HDD to BOSE amp., and BOSE amp. outputs
to each speaker.
Speed Sensitive Volume
 Volume level of this system gone up and down autom atically in proportion to the vehicle speed.
 The control level can be selected by the customer.
Driver's Audio Stage
 Driver's Audio Stage controls the speaker's output characte ristic by BOSE amp. so that the driver's seat is to
be the center of sounds.
 ON/OFF signals of Driver's Audio Stage are transmitt ed from AV control unit to BOSE amp. using mode
change signal.
DVD PLAY FUNCTION
 DVD is played by inserting DVD into the AV control unit.
 DVD image signals are transmitted to the front display unit, and DVD sound signals are transmitted to each
speaker via BOSE amp.
 DVD image signals and sound signals are transmitted to the headrest display unit via the video distributor.
The headrest display unit transmits the sound signals to the headphone via infrared communication.
USB CONNECTION FUNCTION
 Connecting iPod® or USB memory allows the driver to play iPod® music files or USB memory-stored music
files, video data, and image viewer data.
 Sound signals of music files stored in iPod
® or USB memory are transmitted from the USB connector to the
AV control unit. The AV control unit transmits t he sound signals to the BOSE amp. and video distributor.
 Sound signals transmitted from the BOSE amp. to each speaker, and sound signals transmitted from the
video distributor to headphone via headrest display unit
 Video signals and image viewer file signals are transmitt ed from the USB connector to the AV control unit.
The data and files are displayed on the front display unit screen.
Revision: 2010 May2011 QX56

AV-18
< SYSTEM DESCRIPTION >
SYSTEM
 Video signals are transmitted from the USB connector to the AV control unit. The data and files are displayed
on the headrest display unit screen.
iPod
® is recharged when connected to USB connector.
 Only files that meet the following conditions will be played.
NOTE:
iPod
® is a trademark of Apple inc., regist ered in the U.S. and other countries.
 Image signals cannot be received from iPod
®.
 Use the enclosed USB harness when connecting iPod
® to USB connector.
 If a video-sound codec combination is not satisfied, its video file may not be played.
 Signals cannot be transmitted to video dist ributor under the following conditions:
- Only sound signal or only image viewer data is stored in iPod
®
- Only sound signal or only image viewer data is stored in USB memory
FRONT AUXILIARY INPUT FUNCTION
 Image and sound can be output from an external devic e by connecting a device with front auxiliary input
jacks.
 AUX image signals are transmitted to each unit as follows:
- To the front display unit via AV control unit.
- To the headrest display unit via AV control unit and video distributor.
 AUX sound signals are transmitted to each unit as follows:
- To each speaker via AV control unit and BOSE amp.
- To the video distributor via AV control unit, and headphone sound signals are transmitted to infrared commu-
nication between headrest display unit and headphone.
MOBILE ENTERTAINMENT SYSTEM
 Image and sound (DVD, USB memory-stored video data and front auxiliary input) played by AV control unit can be enjoyed in rear seat using headrest display unit and headphone.
 Image and sound of external device connected to rear aux iliary input jacks for rear seat can be enjoyed in
rear seat using headrest display unit and headphone. Al so, image and sound from rear auxiliary input jacks
can be selected and played individually on each side as well as on both sides.
 Headrest display unit has the self-diagnosis function. Refer to AV-49, "
On Board Diagnosis Function".
NOTE:
Image signal and sound signal from rear auxiliary input ja cks is not transmitted to front display unit and each
speaker.
Operating Signal
 The mobile entertainment system can be controlled by one of the rear seat remote controller.
 It receives the operation signal of the rear seat remote controller by the remote control receiver built into
headrest display unit, and then transmits it to the AV control unit and the video distributor.
Headphone Sound
 Sound signal output from AV control unit or rear auxilia ry input jacks are transmitted to headrest display unit
via video distributor.
 Headphone sound signals are transmitted to infrared communication between headrest display unit and
headphone.
Screen headrest display
 Image signal output from AV control unit or rear auxili ary input jacks are transmitted to headrest display unit
via video distributor.
 Image switch signal is input from headrest display uni t to AV control unit or from headrest display unit to
video distributor, according to rear seat remote controller operation.
 When image switch signal is transmitted from headrest display unit to AV control unit via AV communication,
image played by AV control unit (DVD, USB memory-sto red video data, and front auxiliary input) switches.
 When image switch signal is input from headrest displa y unit to video distributor via hard wire, image output
from AV control unit and image output from rear auxiliary input jacks switch.
Music file Video file Image viewer file
File format “MP3”, “WMA”, “AAC”, “M4A” “DivX”, “MPEG4 (ASF)” “JPEG”
File extension “.mp3”, “.wma”, “.aac”, “.m4 a” “.divx”, “.afs”, “.avi” “.jpg”, “.jpeg”
Maximum file size 2 GB 2 GB 2 MB
Revision: 2010 May2011 QX56