2009 INFINITI QX56 audio

AV-90
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
CENTER SPEAKER
CENTER SPEAKER
DescriptionINFOID:0000000003776875
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 center speaker using the audio signal circuits.
Diagnosis ProcedureINFOID:0000000003776876
1.HARNESS CHECK
1. Disconnect BOSE speaker amp. connector M113 and center speaker connector M110.
2. Check continuity between BOSE speaker amp. harness connec- tor M113 (A) and center speaker harness connector M110 (B).
3. Check continuity between BOSE speaker amp. harness connec- tor M113 (A) and ground.
Are continuity test results as specified?
YES >> GO TO 2.
NO >> • Check connector housings for disconnected or loose terminals. • Repair harness or connector.
2.CENTER SPEAKER SIGNAL CHECK
1. Connect BOSE speaker amp. connector M113 and center speaker connector M110.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal between BOSE speaker amp. harness connec-
tor M113 terminals with CONS ULT-III or oscilloscope.
Is the audio signal voltage reading as specified?
YES >> Replace center speaker. Refer to AV-172, "Removal and Installation".
NO >> GO TO 3.
3.HARNESS CHECK
A B Continuity
Connector Terminal Connector Terminal
M113 15
M110 1
Ye s
28 2
A —Con tin uit y
Connector Terminal
M113 15
Ground No
28
ALNIA0349GB
Connector Te r m i n a l s
Condition Reference
signal
(+) (-)
M113 15 28 Receive
audio sig-
nal
ALNIA0842GB
SKIA0177E
Revision: December 20092009 QX56

AV
CENTER SPEAKERAV-91
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
C
D
E
F
G H
I
J
K L
M B A
O P
1. Disconnect AV control unit connector M42 and BOSE speaker
amp. connector M113.
2. Check continuity between AV control unit harness connector
M42 (A) and BOSE speaker amp. harness connector M113 (B).
3. Check continuity between AV control unit harness connector M42 (A) and ground.
Are continuity test results as specified?
YES >> GO TO 4.
NO >> • Check connector housings for disconnected or loose terminals. • Repair harness or connector.
4.FRONT SPEAKER SIGNAL CHECK
1. Connect AV control unit connector and BOSE speaker amp. connector.
2. Turn ignition switch ACC.
3. Push “POWER” switch.
4. Check the signal between AV control unit harness connector M42 terminals with CONSULT-III or oscilloscope.
Are the audio signal voltage readings as specified?
YES >> Replace BOSE speak er amp. Refer to AV-181,
"Removal and Installation".
NO >> Replace AV control unit. Refer to AV-168, "
Removal and
Installation".
AB
Continuity
Connector Terminal Connector Terminal
M42 2
M113 18
Ye s
33
2
11 1 9
12 20
A —Con tin uit y
Connector Terminal
M42 2
Ground No
3
11
12
ALNIA0416GB
Connector Te r m i n a l s
Condition Reference
signal
(+) (-)
M42 23
Receive
audio sig-
nal
11 1 2
ALNIA0417GB
SKIA0177E
Revision: December 20092009 QX56

AV-92
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
REAR DOOR SPEAKER
REAR DOOR SPEAKER
DescriptionINFOID:0000000003776877
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:0000000003776878
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 —Con tin uit y
Connector Terminal
M112 1
Ground No
10
2
3
ALNIA0352GB
Revision: December 20092009 QX56

AV
REAR DOOR SPEAKERAV-93
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
C
D
E
F
G H
I
J
K L
M B A
O P
1. Connect BOSE speaker amp. connectors and suspect speaker
connector.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal between BOSE speaker amp. harness connec- tors M112 terminals with CONSULT-III or oscilloscope.
Are audio signal voltage readings as specified?
YES >> Replace suspect speaker. Refer to AV-174, "Removal
and Installation".
NO >> GO TO 3.
3.HARNESS CHECK
1. Disconnect AV control unit connector M42 and BOSE speaker
amp. connector M113.
2. Check continuity between AV control unit harness connector
M42 (A) and BOSE speaker amp. harness connector M113 (B).
3. Check continuity between AV control unit harness connector M42 (A) and ground.
Are the continuity test results as specified?
YES >> GO TO 4.
NO >> • Check connector housings for disconnected or loose terminals. • Repair harness or connector.
4.REAR DOOR SPEAKER SIGNAL CHECK
Connector Te r m i n a l s
Condition Reference
signal
(+) (-)
M112 110
Receive
audio sig-
nal
23
ALNIA0843GB
SKIA0177E
AB

Continuity
Connector Terminal Connector Terminal
M42 4
M113 21
Ye s
52
2
13 23
14 33
A —Con tin uit y
Connector Terminal
M42 4
Ground No
5
13
14
ALNIA0418GB
Revision: December 20092009 QX56

AV-94
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
REAR DOOR SPEAKER
1. Connect AV control unit connector M42 and BOSE speaker
amp. connector M113.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal between AV control unit harness connector M42 terminals with CONSULT-III or oscilloscope.
Is the audio signal voltage reading as specified?
YES >> Replace BOSE speaker amp. Refer to AV-181,
"Removal and Installation".
NO >> Replace AV control unit. Refer to AV-168, "
Removal and
Installation".
ConnectorTe r m i n a l s
Condition Reference
signal
(+) (-)
M42 45
Receive
audio sig-
nal
13 14
ALNIA0419GB
SKIA0177E
Revision: December 20092009 QX56

AV
REAR DOOR TWEETERAV-95
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
C
D
E
F
G H
I
J
K L
M B A
O P
REAR DOOR TWEETER
DescriptionINFOID:0000000003776879
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:0000000003776880
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 —Contin u it y
Connector Terminal
M112 1
Ground No
10
2
3
ALNIA0352GB
Revision: December 20092009 QX56

AV-96
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
REAR DOOR TWEETER
1. Connect BOSE speaker amp. connectors and suspect tweeter
connector.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal between BOSE speaker amp. harness connec- tors M112 terminals with CONSULT-III or oscilloscope.
Are audio signal voltage readings as specified?
YES >> Replace suspect tweeter. Refer to AV-171, "Removal
and Installation".
NO >> GO TO 3.
3.HARNESS CHECK
1. Disconnect AV control unit connector M42 and BOSE speaker amp. connector M113.
2. Check continuity between AV control unit harness connector
M42 (A) and BOSE speaker amp. harness connector M113 (B).
3. Check continuity between AV control unit harness connector M42 (A) and ground.
Are the continuity test results as specified?
YES >> GO TO 4.
NO >> • Check connector housings for disconnected or loose terminals. • Repair harness or connector.
4.REAR DOOR SPEAKER SIGNAL CHECK
Connector Te r m i n a l s
Condition Reference
signal
(+) (-)
M112 110
Receive
audio sig-
nal
23
ALNIA0843GB
SKIA0177E
AB

Continuity
Connector Terminal Connector Terminal
M42 4
M113 21
Ye s
52
2
13 23
14 33
A —Contin u it y
Connector Terminal
M42 4
Ground No
5
13
14
ALNIA0418GB
Revision: December 20092009 QX56

AV
REAR DOOR TWEETERAV-97
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
C
D
E
F
G H
I
J
K L
M B A
O P
1. Connect AV control unit connector M42 and BOSE speaker amp. connector M113.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal between AV control unit harness connector M42 terminals with CONSULT-III or oscilloscope.
Is the audio signal voltage reading as specified?
YES >> Replace BOSE speak er amp. Refer to AV-181,
"Removal and Installation".
NO >> Replace AV control unit. Refer to AV-168, "
Removal and
Installation".
ConnectorTe r m i n a l s
Condition Reference
signal
(+) (-)
M42 45
Receive
audio sig-
nal
13 14
ALNIA0419GB
SKIA0177E
Revision: December 20092009 QX56