2007 INFINITI QX56 display

AV-22
< SERVICE INFORMATION >
AUDIO
42 (R) 41 (G)Audio left
channel
sound signal
from satel-
lite radio
tunerInput ONReceive audio
signalNo sound from satel-
lite radio tuner left
channel.
44 (W) 43 (B)Audio right
channel
sound signal
from satel-
lite radio
tunerInput ONReceive audio
signalNo sound from satel-
lite radio tuner right
channel.
45 –Shield
ground (au-
dio signal)–– – 0V –
46 –Shield
ground (da-
ta)–– – 0V –
48 (L) GroundSatellite ra-
dio tuner re-
quest to
audio unitInput ONTurn audio unit
ON 5VSatellite radio tuner
does not operate
properly.
49 (O/L) Ground Audio RX Input ONOperate audio
volume Satellite radio tuner
audio information
does not display
properly.
50 (W/L) Ground Audio TX Output ONOperate audio
volume Satellite radio tuner
audio information
does not display
properly.
65 (O/L) Ground Audio RX Input ONOperate audio
volume Audio does not oper-
ate properly. Te r m i n a l
(Wire color)
ItemSignal
input/
outputCondition
Reference value
(Approx.)Example of symptom
+–Ignition
switchOperation
SKIA0177E
SKIA0177E
SKIA4403E
SKIA4402E
SKIA4403E

AUDIO
AV-29
< SERVICE INFORMATION >
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STARTING THE SELF-DIAGNOSIS MODE
1. Turn ignition switch from OFF to ACC.
2. Within 10 seconds press and hold the switches “MEMORY 1”
and “MEMORY 6” simultaneously for 3 seconds.
Then the self-diagnosis operates. A single beep indicates self-
diagnosis mode is active.
3. Press each switch and listen for beep.
NOTE:
CD player LOAD and EJECT buttons are not included in this test
and will not beep when pressed.
EXITING THE SELF-DIAGNOSIS MODE
Turn ignition switch OFF. Then the self-diagnosis ends.
DIAGNOSIS FUNCTION
• It can check for continuity of the switches by sounding the beep when each AV switch and steering switch is
pressed.
• It can check for continuity of harness between AV switch and steering switch.
Trouble DiagnosisINFOID:0000000003533673
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-
134, "Unable to Operate All of AV Switches (Unable to Start Self-Diagnosis)".
WKIA4455E
Symptom Possible cause
Inoperative• Audio unit power circuit check. Refer to AV- 3 1 , "
Power Supply Circuit Inspec-
tion".
• Audio communication line check. Refer to AV- 3 8 , "
Audio Communication
Line Check".
• AV switch check. Refer to AV- 3 8 , "
AV S w i t c h C h e c k".
If above check is OK, replace audio unit. Refer to AV- 4 6 , "
Removal and Instal-
lation".
Steering switch does not operate• Steering switch check. Refer to AV- 3 7 , "
Steering Switch Check".
• AV switch check. Refer to AV- 3 8 , "
AV S w i t c h C h e c k".
If above check is OK, replace audio unit. Refer to AV- 4 6 , "
Removal and Instal-
lation".
Audio information is not displayed on screen • Display unit check. Refer to AV- 9 8 , "
Self-Diagnosis Mode (DCU)".
All speakers do not sound• Audio unit
• BOSE speaker amp. power supply and ground circuit check. Refer to AV- 3 1 ,
"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- 3 9 , "
Sound Is Not Heard from Front
Door Speaker or Front Tweeter".
• Rear door speaker check. Refer to AV- 4 1 , "
Sound Is Not Heard from Rear
Door Speaker or Rear Door Tweeter".
• Subwoofer check. Refer to AV- 4 4 , "
Sound Is Not Heard from Subwoofer".
• Center speaker check. Refer to AV- 4 4 , "
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.)

AV-30
< SERVICE INFORMATION >
AUDIO
FOR RADIO ONLY
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:
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- 3 1 , "
Power Supply Cir-
cuit Inspection".
• Audio unit
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 2 , "
Satellite Radio Tuner (Factory Installed) Power and Ground
Supply Circuit Inspection".
• Satellite radio tuner (factory installed) communication circuit inspection. Re-
fer to AV- 3 3 , "
Satellite Radio Tuner (Factory Installed) Communication Circuit
Inspection".
If above check is OK, replace satellite radio tuner (factory installed). Refer to
AV- 4 6 , "
Removal and Installation".
Right or left channel does not sound• Satellite radio tuner (factory installed) right channel audio signal circuit in-
spection. Refer to AV- 3 6 , "
Satellite Radio Tuner (Factory Installed) Right
Channel Audio Signal Circuit Inspection".
• Satellite radio tuner (factory installed) left channel audio signal circuit inspec-
tion. Refer to AV- 3 5 , "
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- 4 6 , "
Removal and Installation".
Poor reception• Location of vehicle. Make certain vehicle is in an open area.
• Satellite radio antenna or antenna feeder. Refer to AV- 5 2
.
Noisy• Satellite radio tuner (factory installed) ground.
• Satellite radio tuner (factory installed) harness shield wires.
• Electrical equipment (generator, bonding wire, etc.). Refer to AV- 3 1 , "
Noise
Inspection".

AUDIO
AV-31
< SERVICE INFORMATION >
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• 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 InspectionINFOID:0000000003533674
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
Power Supply Circuit InspectionINFOID:0000000003533675
1.CHECK FUSES
Check that the following fuses are not blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of blown fuse before installing new fuse. Refer to PG-
3.
2.POWER SUPPLY CIRCUIT CHECK
1. Disconnect audio unit connector M43, subwoofer connector B72 and BOSE speaker amp. connector
M112.
2. Check voltage between the audio unit and ground.
Occurrence condition Possible cause
Occurs only when engine is ON.A continuous growling noise occurs. The speed of
the noise varies with changes in the engine speed.• Ignition components
A whistling noise occurs while the engine speed is
high. A booming noise occurs while the engine is
running and the lighting switch is ON.• Generator
The occurrence of the noise is linked with the operation of the fuel pump. • Fuel pump condenser
Noise only occurs when various
electrical components are oper-
ating.A cracking or snapping sound occurs with the op-
eration of various switches.• Relay malfunction, audio unit malfunction
The noise occurs when various motors are operat-
ing.• Motor case ground
•Motor
The noise occurs constantly, not just under certain conditions.• Rear defogger coil malfunction
• Open circuit in printed heater
• Poor ground of antenna amplifier or anten-
na feeder line
A cracking or snapping sound occurs while the vehicle is being driven, especially when
it is vibrating excessively.• Ground wire of body parts
• Ground due to improper part installation
• Wiring connections or a short circuit
Unit Terminals Signal name Fuse No.
Audio unit6 Battery power 31
10 Ignition switch ACC or ON 4
AV switch1 Battery power 31
2 Ignition switch ACC or ON 4
BOSE speaker amp. 1 Battery power 31
Subwoofer 6 Battery power 17

AV-38
< SERVICE INFORMATION >
AUDIO
2. Check continuity between spiral cable terminals.
OK or NG
OK >> GO TO 4.
NG >> Replace spiral cable. Refer to SRS-37, "
Removal and Installation".
4.CHECK STEERING SWITCH RESISTANCE
Check resistance between steering switch terminals.
OK or NG
OK >> Inspection End.
NG >> Replace steering switch. Refer to AV-46, "
Removal and Installation".
AV Switch CheckINFOID:0000000003533681
1.AV SWITCH SELF-DIAGNOSIS FUNCTION CHECK
1. Perform AV switch self-diagnosis function. Refer to AV-28, "
AV Switch Self-Diagnosis Function".
Does AV switch operate normally?
YES >> Inspection End.
NO >> GO TO 2.
2.CHECK AV SWITCH POWER SUPPLY AND GROUND CIRCUIT
1. Check AV switch power supply and ground circuit. Refer to AV-113, "
Power Supply and Ground Circuit
Inspection for AV Switch".
OK or NG
YES >> Replace AV switch. Refer to AV-145, "Removal and Installation".
NO >> Repair malfunctioning part.
Audio Communication Line CheckINFOID:0000000003533682
1.CHECK AUDIO COMMUNICATION LINE
Start audio communication line check. Refer to AV-119, "
Audio Communication Line Check (Between Display
Control Unit and Audio Unit)".
OK or NG
OK >> Inspection End.
NG >> Replace malfunctioning part.
Te r m i n a l s
Continuity Spiral cable
Connector Terminal Connector Terminal
M3032
M10216
Ye s 31 17
24 20
WKIA4424E
Terminal Signal name ConditionResistance
(Ω)
(Approx.)
16 17Seek (down) Depress (station) down switch. 165
Power Depress power switch. 0
Volume (down) Depress volume down switch. 652
20 17Seek (up) Depress (station) up switch. 165
Mode Depress mode switch. 0
Volume (up) Depress volume up switch. 652
WKIA4457E

AV-74
< SERVICE INFORMATION >
NAVIGATION SYSTEM
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 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 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-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 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.
• 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, parking lot in a building, and under an elevated highway. Radio waves from
the GPS satellites may not be received when some object is located over the GPS antenna.
SEL685V
SEL686V
SKIA0613E
SEL526V

NAVIGATION SYSTEM
AV-75
< SERVICE INFORMATION >
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• Position correction by GPS is not available while the vehicle is stopped.
COMPONENT DESCRIPTION
NAVI Control Unit
• The gyro (angular speed sensor) and the DVD-ROM drive are
built-in units that control the navigation functions.
• Signals are received from the gyro, the vehicle speed sensor, and
the GPS antenna. Vehicle location is determined by combining this
data with the data contained in the DVD-ROM map. Location infor-
mation is shown on liquid crystal display (display unit).
• Maps, traffic control regulations, and other pertinent information
can be easily read from the DVD-ROM disc.
• The oscillator gyro sensor is used to detect changes in vehicle
steering angle.
Map DVD-ROM
• The map DVD-ROM has maps, traffic control regulations, and other pertinent information.
• To improve DVD-ROM map matching and route determination functions, the DVD-ROM uses an exclusive
Nissan format. Therefore, the use of a DVD-ROM provided by other manufacturers cannot be used.
Display Control Unit
The display control unit coordinates audio and video signals between the NAVI control unit and the display
unit.
Display Unit
Displays NAVI system information.
AV Switch
AV switch allows user to input NAVI display settings. Self diagnostics are initiated using AV switch.
GPS Antenna
GPS antenna sends signals to NAVI control unit.
CAN Communication System DescriptionINFOID:0000000003533707
Refer to LAN-4.
WKIA4593E

AV-76
< SERVICE INFORMATION >
NAVIGATION SYSTEM
Component Parts Location
INFOID:0000000003533708
WKIA4571E
1. Fuse block (J/B) 2. Fuse and fusible link box 3. Combination switch
M28
4. Combination meter
M245. GPS antenna 6. Display unit
M93
7. Display control unit
M94, M958. AV switch
M989. Audio unit
M45
10. Data link connector
M2211 . B C M
M18, M2012. Steering wheel audio control switches
13. NAVI control unit
B151, B152, B15414. IPDM E/R
E121, E124