2010 INFINITI QX56 steering

AV
AV-3
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Description ..........................................................
....
81
Diagnosis Procedure ...............................................81
RGB AREA (YS) SIGNAL CIRCUIT ..................82
Description .......................................................... ....82
Diagnosis Procedure ...............................................82
HORIZONTAL SYNCHRONIZING (HP) SIG-
NAL CIRCUIT ................................................. ....
83
Description .......................................................... ....83
Diagnosis Procedure ...............................................83
VERTICAL SYNCHRONIZING (VP) SIGNAL
CIRCUIT ......................................................... ....
84
Description .......................................................... ....84
Diagnosis Procedure ...............................................84
FRONT DOOR SPEAKER .................................85
Description .......................................................... ....85
Diagnosis Procedure ...............................................85
FRONT TWEETER .............................................88
Description .......................................................... ....88
Diagnosis Procedure ...............................................88
CENTER SPEAKER ...........................................91
Description .......................................................... ....91
Diagnosis Procedure ...............................................91
REAR DOOR SPEAKER ....................................93
Description .......................................................... ....93
Diagnosis Procedure ...............................................93
REAR DOOR TWEETER ...................................96
Description .......................................................... ....96
Diagnosis Procedure ...............................................96
BACK DOOR SPEAKER ...................................99
Description .......................................................... ....99
Diagnosis Procedure ...............................................99
SUBWOOFER ..................................................102
Description .......................................................... ..102
Diagnosis Procedure .............................................102
AMP ON SIGNAL CIRCUIT .............................105
Description .......................................................... ..105
Diagnosis Procedure .............................................105
STEERING SWITCH ........................................106
Description .......................................................... ..106
Diagnosis Procedure .............................................106
MICROPHONE SIGNAL CIRCUIT ...................108
Description .......................................................... ..108
Diagnosis Procedure .............................................108
ECU DIAGNOSIS .......................................110
AV CONTROL UNIT ....................................... ..110
Reference Value ................................................. ..110
Wiring Diagram .....................................................116
DTC Index ........................................................... ..144
DISPLAY UNIT ................................................146
Reference Value ....................................................146
BOSE SPEAKER AMP ...................................149
Reference Value ....................................................149
REAR VIEW CAMERA CONTROL UNIT .......152
Reference Value ....................................................152
DVD PLAYER ..................................................154
Reference Value ....................................................154
SYMPTOM DIAGNOSIS ............................156
MULTI AV SYSTEM ........................................156
Symptom Table ................................................... ..156
NORMAL OPERATING CONDITION .............158
Description .............................................................158
PRECAUTION ............................................166
PRECAUTIONS ...............................................166
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
166
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .................................
166
PREPARATION .........................................168
PREPARATION ...............................................168
Commercial Service Tools ................................... ..168
ON-VEHICLE REPAIR ...............................169
AV CONTROL UNIT ........................................169
Removal and Installation ..................................... ..169
DISPLAY UNIT ................................................171
Removal and Installation .......................................171
FRONT TWEETER ..........................................172
Removal and Installation .......................................172
CENTER SPEAKER ........................................173
Removal and Installation .......................................173
FRONT DOOR SPEAKER ..............................174
Removal and Installation .......................................174
REAR DOOR SPEAKER ................................175
Removal and Installation .......................................175
BACK DOOR SPEAKER ................................176
Removal and Installation .......................................176
SUBWOOFER .................................................177
Removal and Installation .......................................177
DVD PLAYER ..................................................178
Removal and Installation .......................................178
Revision: April 20092010 QX56

AV-4
STEERING SWITCH ........................................179
Removal and Installation ..................................... ..179
REAR AUDIO REMOTE CONTROL UNIT ......180
Removal and Installation ..................................... ..180
DVD ENTERTAINMENT SYSTEM ..................181
Removal and Installation ..................................... ..181
BOSE SPEAKER AMP ....................................182
Removal and Installation ..................................... ..182
AUDIO ANTENNA ...........................................183
Location of Antennas ........................................... ..183
Window Antenna Repair ........................................183
SATELLITE RADIO ANTENNA .......................185
Removal and Installation .......................................185
GPS ANTENNA .............................................. ..186
Removal and Installation .......................................186
MICROPHONE ............................................... ..187
Removal and Installation .......................................187
REAR VIEW CAMERA .....................................188
Removal and Installation .......................................188
REAR VIEW CAMERA CONTROL UNIT ....... ..189
Removal and Installation .......................................189
Revision: April 20092010 QX56

AV-10
< FUNCTION DIAGNOSIS >[AUDIO SYSTEM]
AUDIO SYSTEM
The audio system consists of the following components
• AV control unit
• Display unit
• BOSE speaker amp.
• Window antenna
• Steering wheel audio control switches
• A/C and AV switch assembly
• Rear audio remote control unit
• Front door speakers
• Front tweeters
• Center speaker
• Rear door speakers
• Rear door tweeters
• Back door speakers
• Subwoofer
When the audio system is on, radio signals are receiv
ed by the window antenna. The AV control unit then
sends audio signals to the BOSE speaker amp. The BO SE speaker amp. amplifies the audio signals before
sending them to the front door speakers, front tweeters, center speaker, rear door speakers, rear door tweet-
ers, back door speakers and the subwoofer.
Refer to Owner's Manual for audio system operating instructions.
SATELLITE RADIO SYSTEM
The satellite radio system consists of the following components
• Satellite antenna
• AV control unit
When the satellite radio system is on, radio signals are supplied to the AV contro l unit from the satellite
antenna. The AV control unit then sends audio signals to the BOSE speaker amp.
Refer to Owner's Manual for satellite radio system operating instructions.
SPEED SENSITIVE VOLUME SYSTEM
Volume level of this system goes up and down automatically in proportion to the vehicle speed. The control
level can be selected by the customer. Refer to Owner's Manual for operating instructions.
Revision: April 20092010 QX56

AV
AUDIO SYSTEMAV-11
< FUNCTION DIAGNOSIS > [AUDIO SYSTEM]
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Component Parts LocationINFOID:0000000005146224
1. Front tweeter LH M109 2. Steering wheel audio control switch-
es 3. AV control unit M42, M43, M44, M45,
M97, M124, M125
4. Display unit M93 5. Center speaker M1106. A/C and AV switch assembly M98
7. Front tweeter RH M111 8. Aux jack M1049. Compact Flash insert slot
ALNIA0845ZZ
Revision: April 20092010 QX56

AV-12
< FUNCTION DIAGNOSIS >[AUDIO SYSTEM]
AUDIO SYSTEM
Component Description
INFOID:0000000005146225
10. Rear audio remote control unit R204 11. Microphone R109 12. Front door speaker
LH D12
RH D112
13. Rear door tweeter LH D208
RH D308 14. Rear door speaker
LH D207
RH D307 15. Back door speaker
LH D518
RH D716
16. Subwoofer B72 (under driver’s seat) 17. BOSE speaker amp M112, M113 (view behind instrument panel above
accelerator pedal)18. Rear view camera control unit B73
(located behind luggage finisher LH)
19. Rear view camera D504
Part name Description
AV control unit Controls audio system, NAVI functions and satellite radio system functions
Display unit • Touch screen controls all audio and A/C operations
• Displays all audio and climate control related information
BOSE speaker amp. Receives power (amp ON) and audio signals from AV control unit and out-
puts audio signals to each speaker.
Steering wheel audio control switches • Audio operation can be operated
• Steering switch signal is output to AV control unit
Front door speakers • Outputs audio signal from BOSE speaker amp.
• Outputs high, mid and low range sounds
Front tweeters • Outputs audio signal from BOSE speaker amp.
• Outputs high range sounds
Center speaker • Outputs audio signal from BOSE speaker amp.
• Outputs high range sounds
Rear door speakers • Outputs audio signal from BOSE speaker amp.
• Outputs high, mid and low range sounds
Rear door tweeters • Outputs audio signal from BOSE speaker amp.
• Outputs high range sounds
Back door speakers • Outputs audio signal from BOSE speaker amp.
• Outputs high, mid and low range sounds
Subwoofer • Outputs audio signal from BOSE speaker amp.
• Outputs low range sounds
Satellite antenna Audio signal (satellite radio) is received and output to AV control unit.
Revision: April 20092010 QX56

AV-14
< FUNCTION DIAGNOSIS >[AUDIO SYSTEM]
NAVIGATION SYSTEM
MAP–MATCHING
Map–matching is a function that repositions the vehicle on the road
map when a new location is judged to be the most accurate. This is
done by comparing the current vehicle position, calculated by the
method described in the position detection principle, with the road
map data around the vehicle, read from the map data stored on the
HDD.
Therefore, the vehicle position may not be corrected after the vehicle
is driven over a certain distance or time in which GPS information is
hard to receive. In this case, the current-location mark on the display
must be corrected manually.
CAUTION:
The road map data is based on data stored on the HDD.
• In map-matching, alternative rout
es to reach the destination will be
shown and prioritized, after the road on which the vehicle is cur-
rently driven has been judged and the current-location mark has
been repositioned.
If there is an error in distance and/or direction, the alternative
routes will be shown in different order of priority, and the wrong
road can be avoided.
If two roads are running in parallel, they are of the same priority.
Therefore, the current-location mark may appear on either of them
alternately, depending on maneuvering of the steering wheel and
configuration of the road.
• Map-matching does not function correctly when the road on which the vehicle is driving is new and not recorded on the HDD, or when
the road pattern stored in the m ap data and the actual road pattern
are different due to repair.
When driving on a road not present in the map, the map-matching
function may find another road and position the current-location
mark on it. Then, when the correct road is detected, the current-
location mark may leap to it.
• Effective range for comparing the vehicle position and travel direc-
tion calculated by the distance and direction with the road data
read from the HDD is limited. Therefore, when there is an exces-
sive gap between the current vehicle position and the position on
the map, correction by map-matching is not possible.
GPS (GLOBAL POSITIONING SYSTEM)
GPS (Global Positioning System) has been developed and con-
trolled by the US Department of Defense. The system utilizes GPS
satellite (NAVSTAR), sending out radio waves while flying on an orbit
around the earth at the height of approx. 21,000 km (13,000 miles).
The GPS receiver calculates the vehicle's position in three dimen-
sions (latitude/longitude/altitude) according to the time lag of the
radio waves received from four or more GPS satellites (three-dimen-
sional positioning). If radio waves were received only from three
GPS satellites, the GPS receiver calculates the vehicle's position in
two dimensions (latitude/longitude), utilizing the altitude data calcu-
lated previously by using radio wa ves from four or more GPS satel-
lites (two-dimensional positioning).
Type Advantage Disadvantage
Gyroscope (angular velocity sensor) • Can detect the vehicle's turning angle quite
accurately. • Direction errors may accumulate when the ve-
hicle is driven for long distances without stop-
ping.
GPS antenna (GPS information) • Can detect the vehicle's travel direction
(North/South/East/West). • Correct direction cannot be detected when the
vehicle speed is low.
SEL685V
SEL686V
ALNIA0839GB
SEL526V
Revision: April 20092010 QX56

AV-16
< FUNCTION DIAGNOSIS >[AUDIO SYSTEM]
NAVIGATION SYSTEM
Component Parts Location
INFOID:0000000005146228
1. Front tweeter LH M109 2. Steering wheel audio control switch-
es 3. AV control unit M42, M43, M44, M45,
M97, M124, M125
4. Display unit M93 5. Center speaker M110 6. A/C and AV switch assembly M98
7. Front tweeter RH M111 8. Aux jack M1049. Compact Flash insert slot
ALNIA0845ZZ
Revision: April 20092010 QX56

AV
NAVIGATION SYSTEMAV-17
< FUNCTION DIAGNOSIS > [AUDIO SYSTEM]
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Component DescriptionINFOID:0000000005146229
10. Rear audio remote control unit R204 11. Microphone R109 12. Front door speaker
LH D12
RH D112
13. Rear door tweeter LH D208
RH D308 14. Rear door speaker
LH D207
RH D307 15. Back door speaker
LH D518
RH D716
16. Subwoofer B72 (under driver’s seat) 17. BOSE speaker amp M112, M113 (view behind instrument panel above
accelerator pedal)18. Rear view camera
control unit B73
(located behind luggage finisher LHl)
19. Rear view camera D504
Part name Description
AV c o n t r o l u n i t • Controls each operation of the navigation system
• HDD is built in
• Voice guidance signal is output to BOSE speaker amp.
BOSE speaker amp. Voice guidance signal is input from AV control unit, and it is output to speakers.
Front tweeter Voice guidance signal from BOSE speaker amp. is output.
Steering wheel audio control switches • Each operation of navigation system can be performed
• Switch operating signal is output to AV control unit
Microphone Sends voice signals to AV control unit
GPS antenna GPS signal is received and is output to AV control unit.
Revision: April 20092010 QX56