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Page 600 of 3383

INFINITI QX56 2006 Factory Service Manual AUDIOAV-7
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Revision: November 2009 2006 QX56
1. Fuse block (J/B)2. Fuse and fusible link box 3. Front tweeter LH
M109
4. Combination meter M24 5. Center speaker
M110 6. Displa

Page 601 of 3383

INFINITI QX56 2006 Factory Service Manual AV-8
AUDIO
Revision: November 20092006 QX56
System DescriptionEKS00BI8
Refer to Owners Manual for audio system operating instructions.
Power is supplied at all times
through 15A fuse [No. 17, locate

AV-8
AUDIO
Revision: November 20092006 QX56
System DescriptionEKS00BI8
Refer to Owner's Manual for audio system operating instructions.
Power is supplied at all times
through 15A fuse [No. 17, located in the fuse block (J/B)]
to subwoofer terminal 6
through 20A fuse [No. 31, located in the fuse and fusible link box]
to audio unit terminal 6
to BOSE speaker amp. terminal 1
to AV switch terminal 1 and
to display control unit terminal 1.
With the ignition switch in the ACC or ON position, power is supplied
through 10A fuse [No. 4, located in the fuse block (J/B)]
to audio unit terminal 10 and
to AV switch terminal 2 and
to display control unit terminal 10.
With the ignition switch in the ON or START position, power is supplied
through 10A fuse [No. 12, located in the fuse block (J/B)]
to display control unit terminal 12.
Ground is supplied through the case of the audio unit.
Ground is also supplied
to subwoofer terminal 5
through body grounds B7 and B19 and
to BOSE speaker amp. terminal 17
to AV switch terminal 5 and
to display unit terminal 1 and
to display control unit terminal 3
through body grounds M57, M61 and M79.
Then audio signals are supplied
through audio unit terminals 1, 2, 3, 4, 13, 14, 15 and 16
to BOSE speaker amp. terminals 23, 24, 25, 26, 27, 28, 29 and 30.
Audio signals are amplified by the BOSE speaker amp.
The amplified audio signals are supplied
through BOSE speaker amp. terminals 2, 3, 9,10,11,12, 13, 14, 15, 16, 18 and 19
to terminals + and - of front door speaker LH and RH and
to terminals + and - of front tweeter LH and RH and
to terminals + and - of center speaker and
to terminals + and - of rear door speaker LH and RH and
to terminals + and - of rear door tweeter LH and RH and
to terminals 1 and 2 of subwoofer.
When one of steering wheel audio control switches is pushed, the resistance in steering switch circuit changes
depending on which button is pushed.
REAR AUDIO REMOTE CONTROL UNIT
Power is supplied
from audio unit terminal 32
to rear audio remote control unit terminal 13.
Ground is supplied
to rear audio remote control unit terminal 15
through body grounds B117 and B132.
Audio signals are supplied

Page 617 of 3383

INFINITI QX56 2006 Factory Service Manual AV-24
AUDIO
Revision: November 20092006 QX56
44 (W) 43 (B)Audio right
channel
sound sig-
nal from sat-
ellite radio
tunerInput ON
Receive audio
signal No sound from satel-
lite radio tuner right

Page 625 of 3383

INFINITI QX56 2006 Factory Service Manual AV-32
AUDIO
Revision: November 20092006 QX56
Trouble DiagnosisEKS00BIG
The majority of the audio troubles are the result of outside causes (bad CD, electromagnetic interference,
etc.). Check the inspe

AV-32
AUDIO
Revision: November 20092006 QX56
Trouble DiagnosisEKS00BIG
The majority of the audio troubles are the result of outside causes (bad CD, electromagnetic interference,
etc.). Check the inspection items below to diagnose the malfunction.
MALFUNCTION WITH RADIO AND CD
Before proceeding, confirm that other AV switch functions (except audio functions) operate. If not, refer to AV-
155, "Unable to Operate All of AV Switches (Unable to Start Self-Diagnosis)" .
FOR RADIO ONLY
SymptomPossible cause
Inoperative
Audio unit power circuit check. Refer to AV- 3 5 , "Power Supply Circuit
Inspection" .
Audio communication line check. Refer to AV-136, "Audio Communication
Line Check (Between Display Control Unit and Audio Unit)" .
AV switch check. Refer to AV- 4 3 , "AV Switch Check" .
If above check is OK, replace audio unit.
Steering switch does not operate
Steering switch check. Refer to AV-41, "Steering Switch Check" .
AV switch check. Refer to AV- 4 3 , "AV Switch Check" .
If above check is OK, replace audio unit.
Audio information is not displayed on screen
Display unit check. Refer to AV- 11 2 , "Self-Diagnosis Mode (DCU)" .
All speakers do not sound
Audio unit
BOSE speaker amp. power supply and ground circuit check. Refer to AV- 3 5 ,
"Power Supply Circuit Inspection" .
BOSE speaker amp. ON signal
BOSE speaker amp.
One or several speakers do not sound
Front door speaker check. Refer to AV-44, "Sound Is Not Heard From Front
Door Speaker or Front Tweeter" .
Rear door speaker check. Refer to AV- 4 8 , "Sound Is Not Heard From Rear
Door Speaker or Rear Door Tweeter" .
Subwoofer check. Refer to AV- 5 2 , "Sound Is Not Heard From Subwoofer" .
Center speaker check. Refer to AV- 5 1 , "Sound Is Not Heard From Center
Speaker" .
Poor sound
Audio unit
BOSE speaker amp.
Speaker
Noisy
Audio unit
BOSE speaker amp.
Electrical equipment (generator, bonding wire, etc.)
Symptom Possible cause
No sound
Audio unit
Antenna feeder, wiring or connections
Antenna amplifier, power supply, wiring or connections
Noisy
Audio unit
Audio unit case ground
Antenna feeder, wiring or connections
Antenna amplifier, power supply, wiring or connections
Noise prevention parts
Each electrical equipment
Wire harness of each piece of electrical equipment
All radio stations stored in memory are deleted
Audio unit power circuit check. Refer to AV-35, "Power Supply Cir-
cuit Inspection" .
Audio unit

Page 626 of 3383

INFINITI QX56 2006 Factory Service Manual AUDIOAV-33
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Revision: November 2009 2006 QX56
NOTE:
1. The following noise results from variations in field strength, such as fading noise and multi-path noise, or
external no

AUDIOAV-33
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Revision: November 2009 2006 QX56
NOTE:
1. The following noise results from variations in field strength, such as fading noise and multi-path noise, or
external noise from trains and other sources. It is not a malfunction.
Fading noise: This noise occurs because of variations in the field strength in a narrow range due to moun-
tains or buildings blocking the signal.
Multi-path noise: This noise results from the waves sent directly from the broadcast station arriving at the
antenna at a different time from the waves which reflect off mountains or buildings.
FOR CD ONLY
FOR SATELLITE RADIO TUNER (FACTORY INSTALLED) ONLY
NOTE:
Pressing the SAT button, the display unit will display `NO SAT' when the following conditions exist:
Loss of power to the satellite radio tuner (factory installed)
Open or short in the REQ1, TXD, or RXD circuits.
If the satellite antenna is disconnected or inoperative, the display unit will display ANTENNA.
Noise InspectionEKS00BIH
The vehicle itself can be a source of noise if noise prevention parts or electrical equipment is malfunctioning.
Check if noise is caused and/or changed by engine speed, ignition switch turned to each position, and opera-
tion of each piece of electrical equipment, and determine the cause.
NOTE:
The source of the noise can be found easily by listening to the noise while removing the fuses of electrical
components, one by one.
TYPE OF NOISE AND POSSIBLE CAUSE
Symptom Possible cause
CD cannot be inserted.
CD
Audio unit
CD cannot be ejected.
The CD cannot be played.
The sound skips, stops suddenly, or is distorted.
Symptom
Possible cause
Inoperative
Satellite radio tuner (factory installed) power and ground circuit inspection.
Refer to AV- 3 7 , "
Satellite Radio Tuner (Factory Installed) Power and Ground
Supply Circuit Inspection" .
Satellite radio tuner (factory installed) communication circuit inspection.
Refer to AV- 3 8 , "
Satellite Radio Tuner (Factory Installed) Communication
Circuit Inspection" .
If above check is OK, replace satellite radio tuner (factory installed). Refer
to AV- 5 8 , "
SATELLITE RADIO TUNER" .
Right or left channel does not sound
Satellite radio tuner (factory installed) right channel audio signal circuit
inspection. Refer to AV-41, "
Satellite Radio Tuner (Factory Installed) Right
Channel Audio Signal Circuit Inspection" .
Satellite radio tuner (factory installed) left channel audio signal circuit
inspection. Refer toAV- 4 0 , "
Satellite Radio Tuner (Factory Installed) Left
Channel Audio Signal Circuit Inspection" .
If above check is OK, replace satellite radio tuner (factory installed). Refer to
AV- 5 8 , "
SATELLITE RADIO TUNER" .
Poor reception
Location of vehicle. Make certain vehicle is in an open area.
Satellite radio antenna or antenna feeder. Refer to AV- 6 2 , "Location of
Antenna" .
Noisy
Satellite radio tuner (factory installed) ground.
Satellite radio tuner (factory installed) harness shield wires.
Electrical equipment (generator, bonding wire, etc.). Refer to AV-33, "Noise
Inspection" .

Page 637 of 3383

INFINITI QX56 2006 Factory Service Manual AV-44
AUDIO
Revision: November 20092006 QX56
Audio Communication Line CheckEKS00BIL
1. CHECK AUDIO COMMUNICATION LINE
Start audio communication line check. Refer to AV- 1 3 6 , "
Audio Communication

Page 678 of 3383

INFINITI QX56 2006 Factory Service Manual NAVIGATION SYSTEMAV-85
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Revision: November 2009 2006 QX56
MAP-MATCHING
Map-matching is a function that repositions the vehicle on the road
map when a new location is judged to

NAVIGATION SYSTEMAV-85
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Revision: November 2009 2006 QX56
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 DVD-ROM stored in
the DVD-ROM drive.
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 in the map DVD-
ROM.
In map-matching, alternative routes to reach the destination will
be shown and prioritized, after the road on which the vehicle is
currently 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 in the map
DVD-ROM, or when the road pattern stored in the map data and
the actual road pattern are different due to repair.
When driving on a road not present in the map, the map-match-
ing function may find another road and position the current-loca-
tion 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
direction calculated by the distance and direction with the road
data read from the map DVD-ROM is limited. Therefore, when
there is an excessive 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 waves from four or more GPS satel-
lites (two-dimensional positioning).
Accuracy of the GPS will deteriorate under the following conditions.
In two-dimensional positioning, the GPS accuracy will deteriorate when the altitude of the vehicle position
changes.
There may be an error of approximately 10 m (30 ft) in position detected by three-dimensional positioning,
which is more accurate than two-dimensional positioning. The accuracy can be even lower depending on
the arrangement of the GPS satellites utilized for the positioning.
SEL685V
SEL686V
SKIA0613E
SEL526V

Page 679 of 3383

INFINITI QX56 2006 Factory Service Manual AV-86
NAVIGATION SYSTEM
Revision: November 20092006 QX56
Position detection is not possible when the vehicle is in an area where radio waves from the GPS satellite
do not reach, such as in a tunnel,

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