INFINITI QX56 2007 Factory Service Manual

AUDIO
AV-21
< SERVICE INFORMATION >
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16 (L) 15 (B/W)Audio sound
signal rear
RHOutput ONReceive audio
signalNo sound from rear
door speaker RH or
rear door tweeter
RH.
21 (V) GroundRemote
control AOutput ON Audio unit ON 5VRear audio remote
control unit does not
operate properly.
22 (P) GroundRemote
control BOutput ON Audio unit ON 5VRear audio remote
control unit does not
operate properly.
23 (BR/Y) GroundRemote
control COutput ON Audio unit ON 5VRear audio remote
control unit does not
operate properly.
24 (L) GroundRemote
control DOutput ON Audio unit ON 5VRear audio remote
control unit does not
operate properly.
25 (LG) –Remote
control
ground–– – 0VRear audio remote
control switches do
not function.
27 (O/L) 26 (O)Audio sound
signal LHOutput ONReceive audio
signalNo sound from LH
headphone channel.
29 (W) 28 (W/L)Audio sound
signal RHOutput ONReceive audio
signalNo sound from RH
headphone channel.
30 – Shield – – – 0VInterference and dis-
tortion heard from
headphones or rear
audio remote control
unit switches not op-
erating properly.
31 (O) GroundRemote
control en-
able signalOutput ON Audio unit ON 5VRear audio remote
control unit does not
operate.
32 (V) GroundRemote
control
switch pow-
er supplyOutput ON Audio unit ON 12VRear audio remote
control unit does not
operate. Te r m i n a l
(Wire color)
ItemSignal
input/
outputCondition
Reference value
(Approx.)Example of symptom
+–Ignition
switchOperation
SKIA0177E
SKIA0177E
SKIA0177E

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-23
< SERVICE INFORMATION >
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Terminal and Reference Value for BOSE Speaker AmpINFOID:0000000003533668
66 (W/L) Ground Audio TX Output ONOperate audio
volume Audio does not oper-
ate properly.
67 – Shield – ON – 0VInterference and dis-
tortion heard from
speakers.
70 – Shield – – – 0VInterference and dis-
tortion heard from
speakers.
71 (B) 69 (W)Voice guide
signalOutput ONPress the
"GUIDE/VOICE"
button.Only route guide and
operation guide are
not heard.
72 (W/B) GroundCD eject sig-
nalInput ONOperate EJECT
button0V→5VCD will not eject from
audio unit.
73 (Y/B) GroundCD load sig-
nalInput ONOperate LOAD
button0V→5VCD will not load into
audio unit. Te r m i n a l
(Wire color)
ItemSignal
input/
outputCondition
Reference value
(Approx.)Example of symptom
+–Ignition
switchOperation
SKIA4402E
SKIA0171J
Te r m i n a l
(wire color)
ItemSignal
input/
outputCondition
Reference value
(Approx.)Example of
symptom
+–Ignition
switchOperation
1 (Y) Ground Battery Input – – Battery voltageSystem does not
work properly.
9 (SB) 10 (B/Y)Rear door
speaker LH
and rear door
tweeter LHOutput ONReceive audio
signalNo sound from rear
door speaker LH or
rear door tweeter
LH.
11 (O/L) 12 (R/L)Rear door
speaker RH
and rear door
tweeter RHOutput ONReceive audio
signalNo sound from rear
door speaker RH
or rear door tweet-
er RH.
SKIA0177E
SKIA0177E

AV-24
< SERVICE INFORMATION >
AUDIO
13 (L/W) 14 (L/R)Front door
speaker LH
and front
tweeter LHOutput ONReceive audio
signalNo sound from
front door speaker
LH or front tweeter
LH.
15 (W/B) 16 (L/B)Front door
speaker RH
and front
tweeter RHOutput ONReceive audio
signalNo sound from
front door speaker
RH or front tweeter
RH.
17 (B) Ground Ground – ON – – –
18 (V) 2 (R)Center speak-
erOutput ONReceive audio
signalNo sound from
center speaker.
19 (W) 3 (B) Subwoofer Output ONReceive audio
signalNo sound from
subwoofer.
22
(W/G)GroundSubwoofer ON
signalInput ON – More than 6.5VSubwoofer does
not work properly.
24 (L) 23 (B/W)Audio sound
signal rear RHInput ONReceive audio
signalNo sound from rear
door speaker RH
or rear door tweet-
er RH.
26 (BR) 25 (B/R)Audio sound
signal rear LHInput ONReceive audio
signalNo sound from rear
door speaker LH or
rear door tweeter
LH. Te r m i n a l
(wire color)
ItemSignal
input/
outputCondition
Reference value
(Approx.)Example of
symptom
+–Ignition
switchOperation
SKIA0177E
SKIA0177E
SKIA0177E
SKIA0177E
SKIA0177E
SKIA0177E

AUDIO
AV-25
< SERVICE INFORMATION >
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Terminal and Reference Value for Rear Audio Remote Control UnitINFOID:0000000003533669
28 (Y) 27 (BR)Audio sound
signal front RHInput ONReceive audio
signalNo sound from
front door speaker
RH or front tweeter
RH.
30 (W) 29 (B)Audio sound
signal front LHInput ONReceive audio
signalNo sound from
front door speaker
LH or front tweeter
LH.
31 (G/W) GroundAmp. ON sig-
nalInput ON – More than 6.5VSystem does not
work properly. Te r m i n a l
(wire color)
ItemSignal
input/
outputCondition
Reference value
(Approx.)Example of
symptom
+–Ignition
switchOperation
SKIA0177E
SKIA0177E
Te r m i n a l
(Wire color)
ItemSignal
input/
outputCondition
Reference value
(Approx.)Example of symptom
+–Ignition
switchOperation
2 (G) 1 (B)Audio sound
signal LHInput ONReceive audio
signalNo sound from LH
headphone channel.
4 (W) 3 (R)Audio sound
signal RHInput ONReceive audio
signalNo sound from RH
headphone channel.
5 – Shield – – – 0VInterference and dis-
tortion heard from
headphones or rear
audio remote control
unit switches not op-
erating properly.
6 (R/L) Ground Illumination Input ONLighting switch
ON12V
Rear audio remote
control unit does not
illuminate. Lighting switch
OFF0V
7 (LG) –Remote
control
ground–– – 0VRear audio remote
control unit switches
do not function.
SKIA0177E
SKIA0177E

AV-26
< SERVICE INFORMATION >
AUDIO
Terminal and Reference Value for AV Switch
INFOID:0000000003533670
8 (O) GroundRemote
control en-
able signalInput ON Audio unit ON 5VRear audio remote
control unit does not
operate.
9 (V) GroundRemote
control AInput ON Audio unit ON 5VRear audio remote
control unit does not
operate properly.
10 (P) GroundRemote
control BInput ON Audio unit ON 5VRear audio remote
control unit does not
operate properly.
11
(BR/Y)GroundRemote
control CInput ON Audio unit ON 5VRear audio remote
control unit does not
operate properly.
12 (L) GroundRemote
control DInput ON Audio unit ON 5VRear audio remote
control unit does not
operate properly.
13 (V) GroundRemote
control
switch pow-
er supplyInput ON Audio unit ON 12VRear audio remote
control does not op-
erate.
15 (B) – Ground – ON – 0V –Te r m i n a l
(Wire color)
ItemSignal
input/
outputCondition
Reference value
(Approx.)Example of symptom
+–Ignition
switchOperation
Te r m i n a l N o .
(Wire color)
ItemSignal
input/
outputCondition
Vo l ta g e
(Approx.)Example of
symptom
+–Ignition
switchOperation
1 (Y) Ground Battery power Input OFF – Battery voltageSystem does not
work properly.
2 (V) Ground ACC signal Input ACC – Battery voltageSystem does not
work properly.
3 (R/L) GroundIllumination
signalInput OFFLighting switch is
ON (position 1).Battery voltageAV switch illumi-
nation does not
come on when
lighting switch is
ON (position 1). Turn lighting switch
OFF.Approx. 3.0V or less
4 (BR) GroundIllumination
control signalInput ONIllumination control
switch is operated
by lighting switch in
1st position.Changes between 0 and 12V.AV switch illumi-
nation cannot be
controlled.
5 (B) Ground Ground – ON – 0V –
6 (V) GroundCommunica-
tion signal (+)Input/
outputON –System does not
work properly.
7 – Shield ground – – – –
SKIA0175E

AUDIO
AV-27
< SERVICE INFORMATION >
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8 (LG) GroundCommunica-
tion signal (-)Input/
outputON –System does not
work properly.
12 (R) GroundRemote con-
trol AInput ONPress MODE
switch 0V
Steering wheel
audio controls
do not function. Press SEEK UP
switch0.75V
Press VOL UP
switch2V
Except for above 5V
13 (G) GroundRemote con-
trol BInput ONPress POWER
switch 0V
Steering wheel
audio controls
do not function. Press SEEK
DOWN switch0.75V
Press VOL DOWN
switch2V
Except for above 5V
14 (L) –Remote con-
trol ground–– – –Steering wheel
audio controls
do not function.
16 (W/B) GroundCD EJECT
signalOutput ONPressed 0V
CD eject does
not function.
Released 5V
17 (Y/B) GroundCD LOAD
signalOutput ONPressed 0V
CD load does
not function.
Released 5V Terminal No.
(Wire color)
ItemSignal
input/
outputCondition
Vol tag e
(Approx.)Example of
symptom
+–Ignition
switchOperation
SKIA0176E

AV-28
< SERVICE INFORMATION >
AUDIO
Terminal and Reference Value for Satellite Radio Tuner (Factory Installed)
INFOID:0000000003533671
AV Switch Self-Diagnosis FunctionINFOID:0000000003533672
It can check ON/OFF operation of each switch in the AV switch and diagnose the input signals from the steer-
ing switch.
Te r m i n a l
(Wire color)
ItemSignal
input/
outputCondition
Vol tag e
(approx.)
+–Ignition
switchOperation
22 (R) 21 (G) Audio signal LH Output ON Receive audio signal.
24 (W) 23 (B) Audio signal RH Output ON Receive audio signal.
25
– Shield ––
––
26 ON Approx. 0 V
28 (L) GroundREQ1
(SAT-AUDIO)Output ONSet to the satellite radio
mode
29 (O/L) GroundCommunication signal
(SAT-AUDIO)Output ONSet to the satellite radio
mode
30 (W/L) GroundCommunication signal
(AUDIO-SAT)Input ONSet to the satellite radio
mode
32 (Y)
GroundBattery power supply
InputOFF
−Battery voltage
36 (V) ACC power supply ACC
37 – Antenna signal – – –
SKIB3609E
SKIB3609E
SKIB3825E
SKIB3824E
SKIB3826E

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".