2011 INFINITI QX56 radio

AV-2
Description .............................................................108
Work Procedure .....................................................108
CONFIGURATION (AV CONTROL UNIT) ......109
Description ........................................................... ..109
Work Procedure .....................................................109
Configuration List ...................................................109
PREDICTIVE COURSE LINE CENTER POSI-
TION ADJUSTMENT .......................................
111
Description ........................................................... ..111
Work Procedure .....................................................111
CALIBRATING CAMERA IMAGE (AROUND
VIEW MONITOR) .............................................
112
Description ........................................................... ..112
Work Procedure .....................................................112
DTC/CIRCUIT DIAGNOSIS ...................... ..118
U1000 CAN COMM CIRCUIT ......................... .118
Description ........................................................... ..118
DTC Logic ..............................................................118
Diagnosis Procedure ............................................118
U1010 CONTROL UNIT (CAN) .......................119
DTC Logic ............................................................ ..119
U1200 AV CONTROL UNIT .............................120
DTC Logic ............................................................ ..120
U1201 AV CONTROL UNIT .............................121
DTC Logic ............................................................ ..121
U1202 AV CONTROL UNIT .............................122
DTC Logic ............................................................ ..122
U1204 AV CONTROL UNIT .............................123
Description ........................................................... ..123
DTC Logic ..............................................................123
Diagnosis Procedure .............................................123
U1205 AV CONTROL UNIT .............................124
Description ........................................................... ..124
DTC Logic ..............................................................124
Diagnosis Procedure .............................................124
U1206 AV CONTROL UNIT .............................125
Description ........................................................... ..125
DTC Logic ..............................................................125
Diagnosis Procedure .............................................125
U1207 AV CONTROL UNIT .............................126
Description ........................................................... ..126
DTC Logic ..............................................................126
Diagnosis Procedure .............................................126
U1216 AV CONTROL UNIT .............................127
DTC Logic ............................................................ ..127
U1217 AV CONTROL UNIT .............................128
DTC Logic ............................................................ ..128
U1218 AV CONTROL UNIT .............................129
DTC Logic ............................................................ .129
Diagnosis Procedure .............................................129
U1219 AV CONTROL UNIT .............................130
DTC Logic ............................................................ .130
Diagnosis Procedure .............................................130
U121A AV CONTROL UNIT .............................131
DTC Logic ............................................................ .131
Diagnosis Procedure .............................................131
U121B AV CONTROL UNIT .............................132
DTC Logic ............................................................ .132
Diagnosis Procedure .............................................132
U121C AV CONTROL UNIT .............................133
DTC Logic ............................................................ .133
Diagnosis Procedure .............................................133
U121D AV CONTROL UNIT .............................134
DTC Logic ............................................................ .134
Diagnosis Procedure .............................................134
U121E AV CONTROL UNIT .............................135
DTC Logic ............................................................ .135
Diagnosis Procedure .............................................135
U1225 AV CONTROL UNIT .............................136
DTC Logic ............................................................ .136
U1227 AV CONTROL UNIT .............................137
DTC Logic ............................................................ .137
Diagnosis Procedure .............................................137
U1228 AV CONTROL UNIT .............................138
DTC Logic ............................................................ .138
U1229 AV CONTROL UNIT .............................139
DTC Logic ............................................................ .139
U122A AV CONTROL UNIT .............................140
DTC Logic ............................................................ .140
Diagnosis Procedure .............................................140
U122E AV CONTROL UNIT .............................141
DTC Logic ............................................................ .141
U1232 STEERING ANGLE SENSOR ..............142
DTC Logic ............................................................ .142
Diagnosis Procedure .............................................142
U1243 FRONT DISPLAY UNIT ........................143
DTC Logic ............................................................ .143
Diagnosis Procedure .............................................143
U1244 GPS ANTENNA ....................................145
DTC Logic ............................................................ .145
Diagnosis Procedure .............................................145
U1258 SATELLITE RADIO ANTENNA ............146
DTC Logic ............................................................ .146
Diagnosis Procedure .............................................146
Revision: 2010 May2011 QX56

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-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.
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-16
< SYSTEM DESCRIPTION >
SYSTEM
 Map-matching does not function correctly when road on which thevehicle 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 func tion 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 t he 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)
GPS (Global Positioning System) is developed for and is controlled
by the US Department of Defens e. The system utilizes GPS satel-
lites (NAVSTAR), transmitting out radio waves while flying on an orbit
around the earth at an altitude of approximately 21,000 km (13,049
mile).
The receiver calculates the travel position in three dimensions (lati-
tude/longitude/altitude) according to the time lag of the radio waves
that four or more GPS satellites transmit (three-dimensional position-
ing). The GPS receiver calculates the travel position in two dimen-
sions (latitude/longitude) with the previous altitude data if the GPS
receiver receives only three radio waves (two-dimensional position-
ing). GPS position correction is not performed while stopping the
vehicle.
Accuracy of the GPS will deteriorate under the following conditions:
 In two-dimensional positioning, GPS accuracy will det eriorate when altitude of the vehicle position changes.
 The position of GPS satellite affects GPS detection pr ecision. The position detection may not be precisely
performed.
 The position detection is not performed if GPS receiver does not receive radio waves from GPS satellites.
(Inside a tunnel, parking in a building, under an elevat ed highway etc.) GPS receiver may not receive radio
waves from GPS satellites if any object is placed on the GPS antenna.
NOTE:
 The detection result has an error of approximately 10 m (32.81 ft) even with a high-precision three dimen- sional positioning.
 There may be cases when the accuracy is lowered and radio waves are stopped intentionally because the GPS satellite signal is controlled by the US trace control center.
AUDIO FUNCTION
The audio system is equipped with the following functions. Each function is operated with multifunction switch,
preset switch, touch panel, steering switch or audio rec ognition. Operation status of audio is indicated at dis-
play.
Operating Signal
Audio system operation can be performed with multifuncti on switch, preset switch, steering switch, touch
panel function or voice recognition function.
JSNIA0180GB
SEL526V
FUNCTION
AM/FM radio
Satellite radio CD
Bluetooth
™ audio
Music Box (Hard Disk Drive) Speed sensitive volumeDriver's Audio Stage
Revision: 2010 May2011 QX56

AV
SYSTEMAV-17
< SYSTEM DESCRIPTION >
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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
DIAGNOSIS SYSTEM (AV CONTROL UNIT)AV-29
< SYSTEM DESCRIPTION >
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METHOD OF STARTING
1. Start the engine.
2. Turn the audio system OFF.
3. While pressing the “SETTING” button, turn the volume control dial clockwise or counterclockwise for 40 clicks or more. (When
the self-diagnosis mode is start ed, the trouble diagnosis initial
screen is displayed.)
 Shifting from current screen to previous screen is performed
by pressing “BACK” button.
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 dis-
play and touch panel calibration response check.
Vehicle Signals Diagnosis of signals can be performed for vehicle speed, parking brake,
lights, ignition, reverse, side view switch and room lamp.
Speaker Test The connection of a speaker can be confirmed by test tone.
Navigation Steering Angle Ad-
justment
When there is a difference between the actual turning angle and the ve-
hicle mark turning angle, it can be adjusted.
Speed Calibration When there is a difference between the current location mark and the ac-
tual location, it can be adjusted.
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.
Synchronizer FES Clock –
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.
Handsfree Phone The received volume adjustment of hands-free phone, microphone
speaker check, and erase memory can be performed.
Camera It can perform the confirmation of a signal connection to around view
monitor control unit, the calibration
of each camera, Correct Draw Line
of Camera Image, and Fine Tuning of Birds-Eye View.
XM XM NaviTrffic Change Channel
 Any necessary channels required to receive traffic information from the satellite radio system can be set.
Change Application ID
 Any application ID'-s required to receive traffic information from the satellite radio system can be set.
XM NavWeather
XM CGS
Diag
Delete Unit Connection Log Erase the connection history of unit and error history.
Initialize Settings Initializes the AV control unit memory.
Version Information Version information of the AV control unit is displayed. Mode Description
JSNIA2993ZZ
Revision: 2010 May2011 QX56

AV
DIAGNOSIS SYSTEM (AV CONTROL UNIT)AV-31
< SYSTEM DESCRIPTION >
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SELF-DIAGNOSIS RESULTS
Check the applicable display at the following table, and then repair the malfunctioning parts.
Only Unit Part Is Displayed In Red.
A Connecting Cable Between Units Is Displayed In Yellow.
CONFIRMATION/ADJUSTMENT MODE
Screen switch Description Possible malfunction location / Action to
take
Control Unit Malfunction is detected in AV control unit
power supply and ground circuits.Check AV control unit power supply and
ground circuits. When detecting no mal-
function in those components, replace AV
control unit.
Area with yellow connection lines Description
Possible malfunction location / Action to
take
Control unit ⇔ Front Display Serial communication circuits between AV
control unit and front display unit are mal-
functioning. Serial communication circuits between AV
control unit and front display unit.
Control unit ⇔ GPS Antenna GPS antenna connection malfunctions de-
tected. Check the connection of the GPS antenna
connector.
Control unit ⇔ XM Antenna Satellite radio antenna connection malfunc-
tion is detected.
Satellite radio antenna disconnection
Control unit ⇔ Around view
Around view ⇔ Parking Sensor When either one of the following items are
detected:
 around view monitor control unit power
supply and ground circuits are malfunc-
tioning.
 AV communication circuits between AV
control unit and around view monitor
control unit are malfunctioning.  Around view monitor control unit power
supply and ground circuits.
 AV communication circuits between AV
control unit and around view monitor
control unit.
Control unit ⇔ Parking Sensor
Around view ⇔ Parking Sensor When either one of the following items are
detected:
 sonar control unit power supply and
ground circuits are malfunctioning.
 AV communication circuits between AV
control unit and sonar control unit are
malfunctioning.  Sonar control unit power supply and
ground circuits.
 AV communication circuits between AV control unit and sonar control unit.
Control unit ⇔ Video Dist.(Rear)
Video Dist.(Rear) ⇔ Rear display 2 When either one of the following items are
detected:
 video distributor power supply and
ground circuits are malfunctioning.
 headrest display unit LH power supply and ground circuits are malfunctioning.
 AV communication circuits between AV control unit and headrest display unit LH
are malfunctioning.
 location recognition signal circuit be- tween headrest display unit LH and
ground is malfunctioning.  Video distributor power supply and
ground circuits.
 Headrest display unit LH power supply
and ground circuits.
 AV communication circuits between AV control unit and headrest display unit LH.
 Location recognition signal circuit be- tween headrest display unit LH and
ground.
Video Dist.(Rear) ⇔ Rear display 2 When either one of the following items are
detected:
 headrest display unit RH power supply
and ground circuits are malfunctioning.
 AV communication circuits between headrest display unit LH and headrest
display unit RH are malfunctioning.
 location recognition signal circuit be- tween headrest display unit RH and
ground is malfunctioning.  Headrest display unit RH power supply
and ground circuits.
 AV communication circuits between
headrest display unit LH and headrest
display unit RH.
 Location recognition signal circuit be-
tween headrest display unit RH and
ground.
Revision: 2010 May2011 QX56