2007 INFINITI QX56 turn signal

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-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.)

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

AUDIO
AV-33
< SERVICE INFORMATION >
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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. Turn ignition switch OFF.
2. Disconnect satellite radio tuner (factory installed) M41 connector.
3. Check voltage between the satellite radio tuner (factory installed) and ground.
OK or NG
OK >> GO TO 3.
NG >> • Check connector housings for disconnected or loose
terminals.
• Repair harness or connector.
3.GROUND CIRCUIT CHECK
1. Turn ignition switch OFF.
2. Inspect satellite radio tuner (factory installed) case ground.
3. Disconnect satellite radio tuner (factory installed) connector M41 (A) and audio unit connector M42 (B).
4. Check continuity between satellite radio tuner (factory installed) and audio unit.
OK or NG
OK >> Inspection End.
NG >> • Check connector housings for disconnected or loose
terminals.
• Repair harness, connector or satellite radio tuner (factory installed) case ground.
Satellite Radio Tuner (Factory Installed) Communication Circuit InspectionINFOID:0000000003533677
1.CHECK HARNESS - 1
1. Turn ignition switch OFF.
2. Disconnect satellite radio tuner (factory installed) connector M41 and audio unit connector M42.
Unit Terminals Signal name Fuse No.
Satellite radio tuner (factory in-
stalled)32 Battery power 31
36 Ignition switch ACC or ON 4
UnitTerminal No.
OFF ACC ON (+)
(-)
Connector Terminal
Satellite
radio tuner
(factory in-
stalled)M4132 GroundBattery
voltageBattery
voltageBattery
voltage
36 Ground 0VBattery
voltageBattery
voltage
WKIA4539E
Te r m i n a l s
Continuity Satellite radio tuner (factory in-
stalled)Audio unit
Connector Terminal Connector Terminal
A: M4125
B: M4245
Ye s
26 46
WKIA4540E

AV-34
< SERVICE INFORMATION >
AUDIO
3. Check continuity between satellite radio tuner (factory installed)
harness connector M41 (A) terminal 28 and audio unit harness
connector M42 (B) terminal 48
4. Check continuity between satellite radio tuner (factory installed)
harness connector M41 (A) terminal 28 and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair harness or connector.
2.CHECK HARNESS - 2
1. Check continuity between satellite radio tuner (factory installed)
harness connector M41 (A) terminal 29 and audio unit harness
connector M42 (B) terminal 49
2. Check continuity between satellite radio tuner (factory installed)
harness connector M41 (A) terminal 29 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3.CHECK HARNESS - 3
1. Check continuity between satellite radio tuner (factory installed)
harness connector M41 (A) terminal 30 and audio unit harness
connector M42 (B) terminal 50
2. Check continuity between satellite radio tuner (factory installed)
harness connector M41 (A) terminal 30 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4.CHECK REQ1 SIGNAL
1. Connect satellite radio tuner (factory installed) connector and audio unit connector.
2. Turn ignition switch to ACC
3. Check signal between satellite radio tuner (factory installed) har-
ness connector M41 terminal 28 and ground with CONSULT-ll or
oscilloscope.
OK or NG
OK >> GO TO 5.Continuity should exist.
Continuity should not exist.
WKIA4541E
Continuity should exist.
Continuity should not exist.
WKIA4542E
Continuity should exist.
Continuity should not exist.
WKIA4543E
28 - Ground : Refer to AV-28, "Terminal
and Reference Value for Satel-
lite Radio Tuner (Factory In-
stalled)".
WKIA4544E

AUDIO
AV-35
< SERVICE INFORMATION >
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NG >> Replace audio unit. Refer to AV-46, "Removal and Installation".
5.CHECK TXD SIGNAL
1. Check signal between satellite radio tuner (factory installed) har-
ness connector M41 terminal 29 and ground with CONSULT-ll or
oscilloscope.
OK or NG
OK >> GO TO 6.
NG >> Replace audio unit. Refer to AV-46, "
Removal and
Installation".
6.CHECK RXD SIGNAL
1. Check signal between satellite radio tuner (factory installed) har-
ness connector M41 terminal 30 and ground with CONSULT-ll or
oscilloscope.
OK or NG
OK >> Replace satellite radio tuner (factory installed). Refer to
AV-46, "
Removal and Installation".
NG >> Replace audio unit. Refer to AV-46, "
Removal and Installation".
Satellite Radio Tuner (Factory Installed) Left Channel Audio Signal Circuit Inspection
INFOID:0000000003533678
1.CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect satellite radio tuner (factory installed) connector M41 (A) and audio unit connector M42 (B).
3. Check continuity between satellite radio tuner (factory installed) and audio unit.
4. Check continuity between satellite radio tuner (factory installed)
and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair harness or connector.29 - Ground : Refer to AV-28, "
Terminal
and Reference Value for Satel-
lite Radio Tuner (Factory In-
stalled)".
WKIA4545E
30 - Ground : Refer to AV-28, "Terminal
and Reference Value for Satel-
lite Radio Tuner (Factory In-
stalled)".
WKIA4546E
Te r m i n a l s
Continuity Satellite radio tuner (factory in-
stalled)Audio unit
Connector Terminal Connector Terminal
A: M4121
B: M4241
Ye s
22 42
Te r m i n a l s
Continuity Satellite radio tuner (factory installed)
—
Connector Terminal
A: M4121
Ground No
22
WKIA4547E

AV-36
< SERVICE INFORMATION >
AUDIO
2.CHECK LEFT CHANNEL AUDIO SIGNAL
1. Connect satellite radio tuner (factory installed) and audio unit.
2. Turn ignition switch ON.
3. Check signal between satellite radio tuner (factory installed)
connector M41 terminals 21 and 22 with CONSULT-ll or oscillo-
scope.
OK or NG
OK >> Replace satellite radio tuner (factory installed). Refer to
AV-46, "
Removal and Installation".
NG >> Replace audio unit. Refer to AV-46, "
Removal and Installation".
Satellite Radio Tuner (Factory Installed) Right Channel Audio Signal Circuit Inspection
INFOID:0000000003533679
1.CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect satellite radio tuner (factory installed) connector M41 (A) and audio unit connector M42 (B).
3. Check continuity between satellite radio tuner (factory installed) and audio unit.
4. Check continuity between satellite radio tuner (factory installed)
and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair harness or connector.
2.CHECK RIGHT CHANNEL AUDIO SIGNAL
1. Connect satellite radio tuner (factory installed) and audio unit.
2. Turn ignition switch ON.21 - 22 : Refer to AV-28, "
Terminal
and Reference Value for Sat-
ellite Radio Tuner (Factory In-
stalled)".
WKIA4548E
Te r m i n a l s
Continuity Satellite radio tuner (factory in-
stalled)Audio unit
Connector Terminal Connector Terminal
A: M4123
B: M4243
Ye s
24 44
Te r m i n a l s
Continuity Satellite radio tuner (factory installed)
—
Connector Terminal
A: M4123
Ground No
24
WKIA4549E

AUDIO
AV-37
< SERVICE INFORMATION >
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3. Check signal between satellite radio tuner (factory installed)
connector M41 terminals 23 and 24 with CONSULT-ll or oscillo-
scope.
OK or NG
OK >> Replace satellite radio tuner (factory installed). Refer to
AV-46, "
Removal and Installation".
NG >> Replace audio unit. Refer to AV-46, "
Removal and Installation".
Steering Switch CheckINFOID:0000000003533680
1.AV SWITCH SELF-DIAGNOSIS FUNCTION CHECK
1. Start AV switch self-diagnosis function. Refer to AV-28, "
AV Switch Self-Diagnosis Function".
2. Operate steering switch.
Does steering switch operate normally?
YES >> Inspection End.
NO >> GO TO 2.
2.CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect AV switch connector M98 and spiral cable connector M30.
3. Check continuity between spiral cable harness connector terminal and AV switch harness connector ter-
minal.
4. Check continuity between AV switch and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness.
3.SPIRAL CABLE CHECK
1. Disconnect spiral cable connectors M30 and M102.23 - 24 : Refer to AV-28, "
Terminal
and Reference Value for Sat-
ellite Radio Tuner (Factory In-
stalled)".
WKIA4550E
Te r m i n a l s
Continuity Spiral cable AV switch
Connector Terminal Connector Terminal
M3032
M9813
Ye s 31 14
24 12
Te r m i n a l s
Continuity AV switch
—
Connector Terminal
M9812
Ground No 13
14
WKIA1600E