2011 INFINITI QX56 REAR AC CONTROL COMMUNICATION SIGNAL

COMPONENT PARTSADP-7
< SYSTEM DESCRIPTION >
C
DE
F
G H
I
K L
M A
B
ADP
N
O P
Component DescriptionINFOID:0000000006248302
7. ABS actuator and electric unit (con- trol unit)
Refer to BRC-10, "
Component Parts
Location" (With VDC) or BRC-142,
"Component Parts Location" (With
BRAKE ASSIST) or BRC-149,
"Component Parts Location" (With
INTELLIGENT BRAKE ASSIST) 8. Door mirror remote
control switch 9. Seat memory switch
10. Sliding, lifting switch 11. Reclining switch 12. Driver side door switch
13. Door mirror (driver side) 14. T ilt motor 15. Telescopic motor
16. Automatic drive positioner control unit 17. Lifting motor (rear) 18.
Diver seat control unit
19. Lifting motor (front) 20. Sliding motor 21. Reclining motor
A. View with steering column cover low- er removed B. View with instrument lower panel LH
removed C. View with seat cushion pad and seat
back pad removed
D. Backside of seat cushion E. View with seat cushion pad and seat back pad removed
Component parts Description
Driver seat control unit  Main units of automatic drive positioner system.
 It is connected to the CAN.
 It communicates with automatic drive positioner control unit via
UART communication.
 It perform memory function after receiving the door unlock signal
from BCM.
 The address of each part is recorded.
 Operates each motor of seat to the registered position.
 Requests the operation of steering column and door mirror to automatic drive positioner control unit
 Operates the specific seat motor with the signal from power seat
switch.
 Transmits the ignition switch signal (ACC/ON) via UART com- munication to automatic driver positioner control unit.
Automatic drive positioner control unit  It communicates with driver seat control unit via UART commu-
nication.
 Perform various controls with the instructions of driver seat con- trol unit.
 Perform the controls of tilt & telescopic, door mirror and seat memory switch.
 Operates steering column and door mirror with the signal from the driver seat control
BCM Recognizes the following status and transmits it to driver seat con-
trol unit via CAN communication.
 Handle position: LHD
 Driver door: OPEN/CLOSE
 Ignition switch position: ACC/ON
 Steering lock unit status: LOCK/UNLOCK
 Door lock: UNLOCK (with Intelligent key or driver side door re-
quest switch operation)
Key ID
 Starter: CRANKING/OTHER
IPDM E/R ON/OFF signal of A/T shift selector (detention switch) is transmit-
ted to driver seat control unit via CAN communication.
TCM The following signals are transmitted to driver seat control unit via
CAN communication.
 Shift position signal (P range)
 Identification of transmission: A/T
Unified meter and A/C amp. Transmit the vehicle speed signal to driver seat control unit via
CAN communication.
Revision: 2010 May2011 QX56

ADP-8
< SYSTEM DESCRIPTION >
COMPONENT PARTS
ABS actuator and electric unit (control unit)Transmit the vehicle speed signal to driver seat control unit via
CAN communication.
A/T sift selector (Detention switch)  Detention switch is installed on A/T shift selector. It is turned
OFF when A/T shift selector is in P position.
 Driver seat control unit judges that A/T shift selector is in P posi- tion if continuity does not exist in this circuit.
Door mirror remote con-
trol switch Mirror switch
 Mirror switch is integrated in
door mirror remote control switch.
 It operates angle of door mirror face.
 It transmits mirror face adjust operation to automatic drive posi- tioner control unit.
Changeover switch  Changeover switch is integrated
in door mirror remote control
switch.
 Changeover switch has three positions (L, N and R).
 It changes operating door mirror motor by transmitting control signal to automatic drive positioner control unit.
Open/close switch  Open/close switch is integrated in door mirror remote control
switch.
 Power is supplied to folding mi rror from door mirror remote con-
trol switch when operating switch.
Tilt & telescopic switch Tilt switch
 Tilt switch is equipped to steering column.
 The operation signal is input to automatic drive positioner control
unit when tilt switch is operated.
Telescopic switch  Telescopic switch is equipped to steering column.
 The operation signal is input to automatic drive positioner control
unit when telescopic switch is operated.
Seat memory switch Set switch
It is used for registration and setting change of driving position and
Intelligent Key interlock function.
Seat memory switch  The maximum 2 driving positions can be registered by memory
switch 1 to 2.
 Driving position is set to the registered driving position when memory switch is pressed while operation conditions are satis-
fied.
Seat memory indicator Memory indicator indicates the status of auto driving position sys-
tem by turning ON or blinking.
Power seat switch Sliding switch
 Sliding switch is equipped to power seat switch on seat cushion
side surface.
 The operation signal is input to driver seat control unit when slid- ing switch is operated.
Reclining switch  The operation signal is input to driver seat control unit when re-
clining switch is operated.
 The operation signal is input to driver seat control unit when re-
clining switch is operated.
Lifting switch (front)  Lifting switch (front) is equipped to power seat switch on seat
cushion side surface.
 The operation signal is input to driver seat control unit when lift-
ing switch (front) is operated.
Lifting switch (rear)  Lifting switch (rear) is equipped to power seat switch on seat
cushion side surface.
 The operation signal is input to driver seat control unit when lift-
ing switch (rear) is operated.
Component parts Description
Revision: 2010 May2011 QX56

ADP-30
< ECU DIAGNOSIS INFORMATION >
DRIVER SEAT CONTROL UNIT
Fail Safe
INFOID:0000000006248318
The fail-safe mode may be activated if the following symptoms are observed.
33
(R) Ground Battery power supply Input — Battery voltage
34
(B) Ground Sliding motor back-
ward output signal Output Seat sliding Operate
(backward)
12
Other than the
above 0
35
(G) Ground
Reclining motor for-
ward output signal Output Seat reclining Operate
(forward)
12
Other than the
above 0
36
(L) Ground Lifting motor (front)
down output signal
Output Seat lifting (front) Operate
(down)
12
Other than the
above 0
38
(GR) Ground Sliding motor forward
output signal Output Seat sliding Operate
(forward)
12
Other than the
above 0
39
(Y) Ground
Reclining motor back-
ward output signal Output Seat reclining Operate
(backward)
12
Other than the
above 0
40
(W) Ground Lifting motor (front) up
output signal
Output Seat lifting (front) Operate
(up)
12
Other than the
above 0
41
(V) Ground Lifting motor (rear) up
output signal Output Seat lifting (rear) Operate
(up)
12
Other than the
above 0
42
(P/B) Ground
Lifting motor (rear)
down output signal Output Seat lifting (rear) Operate
(down)
12
Other than the
above 0
43
(LG) Ground Ground — — 0
Operating in
fail-safe mode Malfunction ItemRelated
DTC Diagnosis
Only manual functions operate normally. CAN communication U1000
ADP-56
CONTROL UNIT U1010ADP-57
EEPROM B2130ADP-66
Only manual functions, except door mirror, operate normally. UART communication B2128 ADP-64
Only manual functions, except seat sliding, operate normally. Seat sliding output B2112ADP-58
Only manual functions, except seat reclining, operate normally. Seat reclining output B2113ADP-60
Only manual functions, except steering tilt, operate normally. Steering column tilt output B2116ADP-62
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
COMPONENT PARTSAV-11
< SYSTEM DESCRIPTION >
C
DE
F
G H
I
J
K L
M B A
O P
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-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

AV
SYSTEMAV-19
< SYSTEM DESCRIPTION >
C
DE
F
G H
I
J
K L
M B A
O P
HANDS-FREE PHONE FUNCTION
 AV control unit includes hands-free phone function.
 Hands-free communication can be oper ated by connecting using Bluetooth
™ communication with cellular
phone.
 Operation is performed by steering switch, and operating condition is indicated on display.
 Guide sound that is heard during operation is input fr om AV control unit to BOSE amp., and is output from
front speaker and center speaker.
When A Call Is Originated
Spoken voice sound output from the microphone (microphone signal ) is input to AV control unit. AV control unit
outputs to cellular phone with Bluetooth
™ communication as a TEL voice signal. Voice sound is then heard at
the other party.
When Receiving A Call
Voice sound is input to own cellular phone from the other party. TEL voice signal is output to door speaker, and
the signal is input to BOSE amp. via AV control unit by establishing Bluetooth
™ communication from cellular
phone.
TOUCH PANEL SYSTEM
Each operation of multi AV system can be perfo rmed by directly touching a front display.
AROUND VIEW MONITOR FUNCTION
 This system is equipped with wide-angle high-resolution cameras on the front and rear of the vehicle and on
both right and left door mirrors. The images from front view, rear view, front-side view (RH side), and birds-
eye view that shows the view from the top of the vehicle are displayed to monitor the vehicle surroundings.
 Around view monitor control unit cuts out and expands the image received from each camera to create each view.
 The sonar indicator is displayed on display (superimposed on the camera image) in combination with the
camera assistance sonar system to warm of the approach of an obstacle.
 In front view and rear view, the vehicle width, dist ance lines and predictive course lines are superimposed
and displayed. In front-side view, the vehicle distance guiding line and vehicle width guiding line are dis-
played.
 The Birds-Eye view converts the images from 4 cameras into the overhead view and displays the status of
the vehicle on display. The vehicle icon and sonar indica tor that are displayed on the Birds-Eye view display
are rendered by around view monitor control unit.
Around View Monitor Screen
 Around view monitor combines and displays the travel di rection view and “Birds-Eye view”, “Front-Side view”
and then it displays the sonar indicator on the “Birds -Eye view”, “Front-Side view”, “Rear wide view”.
 AV control unit renders the “Change View” switch, view icon, warning message on display.
Revision: 2010 May2011 QX56