2010 INFINITI QX56 wiring diagram

AV
REAR DOOR SPEAKERAV-93
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
C
D
E
F
G H
I
J
K L
M B A
O P
REAR DOOR SPEAKER
DescriptionINFOID:0000000005146331
The AV control unit sends audio signals to the BOSE s peaker amp. The BOSE speaker amp. amplifies the
audio signals before sending them to the rear door speakers using the audio signal circuits.
Diagnosis ProcedureINFOID:0000000005146332
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
1.HARNESS CHECK
1. Disconnect BOSE speaker amp. connectors M112 and suspect speaker connector.
2. Check continuity between BOSE speaker amp. harness connec-
tors M112 (A) and suspect speaker harness connector (B).
3. Check continuity between BOSE speaker amp. harness connec-
tors M112 (A) and ground.
Are the continuity test results as specified?
YES >> GO TO 2.
NO >> • Check connector housings for disconnected or loose terminals. • Repair harness or connector.
2.REAR DOOR SPEAKER SIGNAL CHECK
AB Continuity
Connector Terminal Connector Terminal
M112 1
D207 1
Ye s
10
2
2 D307 1
32
A —Contin u it y
Connector Terminal
M112 1
Ground No
10
2
3
ALNIA0352GB
Revision: April 20092010 QX56

AV-96
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
REAR DOOR TWEETER
REAR DOOR TWEETER
DescriptionINFOID:0000000005146333
The AV control unit sends audio signals to the BOSE s
peaker amp. The BOSE speaker amp. amplifies the
audio signals before sending them to the rear tweeters using the audio signal circuits.
Diagnosis ProcedureINFOID:0000000005146334
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
1.HARNESS CHECK
1. Disconnect BOSE speaker amp. connectors M112 and suspect tweeter connector.
2. Check continuity between BOSE speaker amp. harness connec- tors M112 (A) and suspect tweeter harness connector (B).
3. Check continuity between BOSE speaker amp. harness connec- tors M112 (A) and ground.
Are the continuity test results as specified?
YES >> GO TO 2.
NO >> • Check connector housings for disconnected or loose terminals. • Repair harness or connector.
2.REAR TWEETER SIGNAL CHECK
AB Continuity
Connector Terminal Connector Terminal
M112 1
D207 1
Ye s
10 2
2 D307 1
32
A —Con tin uit y
Connector Terminal
M112 1
Ground No
10
2
3
ALNIA0352GB
Revision: April 20092010 QX56

AV
BACK DOOR SPEAKERAV-99
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
C
D
E
F
G H
I
J
K L
M B A
O P
BACK DOOR SPEAKER
DescriptionINFOID:0000000005146335
The AV control unit sends audio signals to the BOSE s peaker amp. The BOSE speaker amp. amplifies the
audio signals before sending them to the back door speakers using the audio signal circuits.
Diagnosis ProcedureINFOID:0000000005146336
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
1.HARNESS CHECK
1. Disconnect BOSE speaker am p. connectors and suspect
speaker connector.
2. Check continuity between BOSE speaker amp. harness connec-
tors M112 and M113 (A) and suspect speaker harness connec-
tor (B).
3. Check continuity between BOSE speaker amp. harness connec-
tors M112 and M113 (A) and ground.
Are the continuity test results as specified?
YES >> GO TO 2.
NO >> • Check connector housings for disconnected or loose terminals. • Repair harness or connector.
2.BACK DOOR SPEAKER SIGNAL CHECK
AB Continuity
Connector Terminal Connector Terminal
M112 6
D518 1
Ye s
72
M113 37
D716 1
27 2
A —Contin u it y
Connector Terminal
M112 6
Ground No
7
M113 27
37
ALNIA0663GB
Revision: April 20092010 QX56

AV-102
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
SUBWOOFER
SUBWOOFER
DescriptionINFOID:0000000005146337
The AV control unit sends audio signals to the BOSE s
peaker amp. The BOSE speaker amp. amplifies the
audio signals before sending them to the subwoofer using the audio signal circuits.
Diagnosis ProcedureINFOID:0000000005146338
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
1.VERIFY SUBWOOFER POWER AND GROUND SUPPLY
Check power and ground supply to the subwoofer. Refer to AV-71, "
WOOFER : Diagnosis Procedure"
Did the power and ground supply check OK?
YES >> GO TO 2.
NO >> • Check connector housings for disconnected or loose terminals.
• Repair harness or connector.
2.HARNESS CHECK
1. Disconnect BOSE speaker amp. connector M112 and sub- woofer connector.
2. Check continuity between BOSE speaker amp. harness connec- tor M112 (A) and M113 (B) and subwoofer harness connector
B72 (C).
3. Check continuity between BOSE speaker amp. harness connec- tor M112 (A) and M113 (B) and ground.
Are the continuity test results as specified?
YES >> GO TO 3.
NO >> • Check connector housings for disconnected or loose
terminals.
• Repair harness or connector.
3.SUBWOOFER AMP ON SIGNAL CHECK
Connector Terminal Connector Terminal Continuity
A: M112 9
C: B72 2
Ye s
14 1
B: M113 25 4
Connector Terminal -Continuity
A: M112 9
Ground No
14
B: M113 25
ALNIA0365GB
Revision: April 20092010 QX56

AV
AMP ON SIGNAL CIRCUITAV-105
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
C
D
E
F
G H
I
J
K L
M B A
O P
AMP ON SIGNAL CIRCUIT
DescriptionINFOID:0000000005146339
When the audio system is turned on, a voltage signal is s upplied from the AV control unit to the BOSE speaker
amp. When this signal is received, t he BOSE speaker amp. will turn on.
Diagnosis ProcedureINFOID:0000000005146340
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
1.CHECK AMP ON SIGNAL (BOSE SPEAKER AMP)
1. Turn audio system ON.
2. Check voltage between BOSE speaker amp. harness connector M113 terminal 31 and ground.
Is battery voltage present?
YES >> Inspection End.
NO >> GO TO 2.
2.CHECK AMP ON SIGNAL (AV CONTROL UNIT)
Check voltage between AV control unit harness connector M42 ter-
minal 1 and ground.
Is battery voltage present?
YES >> Repair harness or connector.
NO >> Replace AV control unit. Refer to AV-169, "
Removal and
Installation".
31 - Ground
: Battery voltage
ALNIA0369GB
1 - Ground: Battery voltage
ALNIA0420GB
Revision: April 20092010 QX56

AV-106
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
STEERING SWITCH
STEERING SWITCH
DescriptionINFOID:0000000005146341
When one of the steering wheel audio control switches
is pushed, the resistance in the steering wheel audio
control switch circuit changes depending on which button is pushed.
Diagnosis ProcedureINFOID:0000000005146342
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
1.CHECK STEERING WHEEL AUDIO CONTROL SWITCH RESISTANCE
1. Turn ignition switch OFF.
2. Disconnect steering wheel audio control switch connector M102.
3. Check resistance between steering switch connector terminals.
Do the steering wheel audio control switches check OK?
YES >> GO TO 2.
NO >> Replace steering wheel audio control switch. Refer to AV-179, "
Removal and Installation".
2.CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect AV control unit connector M42 and spiral cable con- nector M30.
3. Check continuity between AV control unit harness connector M42 (A) and spiral cable harness connector M30 (B).
4. Check continuity between AV c ontrol unit connector M42 (A) and ground.
Terminal Signal name ConditionResistance
(Ω)
(Approx.)
16 17 Seek (down)
Depress switch. 165
Volume (down) Depress VOL down switch. 487
Phone/Send Depress switch. 0
20 17 Seek (up)
Depress switch. 165
Volume (up) Depress VOL up switch. 487
Mode/End Depress switch. 0
WKIA4457E
AB

Continuity
Connector Terminal Connector Terminal
M42 6
M30 24
Ye s
15 31
16 32
A —Continuity
Connector Terminal
M42 6
Ground No
15
16
ALNIA0332GB
Revision: April 20092010 QX56

AV-108
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
MICROPHONE SIGNAL CIRCUIT
MICROPHONE SIGNAL CIRCUIT
DescriptionINFOID:0000000005146343
Voice signals are transmitted from the microphone to the
AV control unit using the microphone signal circuits.
Diagnosis ProcedureINFOID:0000000005146344
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
1.CHECK HARNESS BETWEEN AV CONTROL UNIT AND MICROPHONE
1. Turn ignition switch OFF.
2. Disconnect AV control unit connector and microphone connec- tor.
3. Check continuity between AV control unit harness connector M45 (A) and microphone harness connector R109 (B).
4. Check continuity between AV control unit harness connector M45 (A) and ground.
Are the continuity test results as specified?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK MICROPHONE POWER SUPPLY
1. Connect AV control unit connector and microphone connector.
2. Turn ignition switch ON.
3. Check voltage between microphone harness connector R109 terminal 4 and ground.
Is voltage reading approx. 5 volts?
YES >> GO TO 3.
NO >> Replace AV control unit. Refer to AV-169, "
Removal and
Installation".
3.CHECK MICROPHONE SIGNAL
AB
Continuity
Connector Terminal Connector Terminal
M45 72
R109 1
Ye s
71 2
70 4
A —Con tin uit y
Connector Terminal
M45 70
GroundNo
71
72
AWLIA1603ZZ
4 - Ground : Approx. 5V
WKIA5796E
Revision: April 20092010 QX56

AV-116
< ECU DIAGNOSIS >[AUDIO SYSTEM]
AV CONTROL UNIT
Wiring Diagram
INFOID:0000000005146346
ABNWA0012GB
Revision: April 20092010 QX56