INFINITI QX56 2008 Factory Service Manual

AV-90
< 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-177,
"Removal and Installation".
NO >> Replace AV control unit. Refer to AV-164, "
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: March 2010
2008 QX56

AV
REAR DOOR TWEETERAV-91
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
C
D
E
F
G H
I
J
K L
M B A
O P
REAR DOOR TWEETER
DescriptionINFOID:0000000001696129
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:0000000001696130
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
Connector Terminal -Continuity
M112 1
Ground No
10
2
3
ALNIA0352GB
Revision: March 2010 2008 QX56

AV-92
< 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-167, "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: March 2010 2008 QX56

AV
REAR DOOR TWEETERAV-93
< 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-177,
"Removal and Installation".
NO >> Replace AV control unit. Refer to AV-164, "
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: March 2010
2008 QX56

AV-94
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
BACK DOOR SPEAKER
BACK DOOR SPEAKER
DescriptionINFOID:0000000001696131
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:0000000001696132
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
Connector Terminal -Continuity
M112 6
Ground No
7
M113 27
37
ALNIA0663GB
Revision: March 2010
2008 QX56

AV
BACK DOOR SPEAKERAV-95
< 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 M113 terminals with CONSULT-III or oscilloscope.
Are audio signal voltage readings as specified?
YES >> Replace suspect speaker. 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 6 7
Receive
audio sig-
nal
M113 37 27
ALNIA0664GB
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: March 2010 2008 QX56

AV-96
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
BACK 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-177,
"Removal and Installation".
NO >> Replace AV control unit. Refer to AV-164, "
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: March 2010
2008 QX56

AV
SUBWOOFERAV-97
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
C
D
E
F
G H
I
J
K L
M B A
O P
SUBWOOFER
DescriptionINFOID:0000000001696133
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:0000000001696134
1.VERIFY SUBWOOFER POWER AND GROUND SUPPLY
Check power and ground supply to the subwoofer. Refer to AV-66, "
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
1. Connect BOSE speaker amp. connector M112.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check voltage between subwoofer connector B72 terminal 4 and ground.
Are the voltage test results as specified?
YES >> GO TO 4
NO >> Replace BOSE speaker amp. Refer to AV-177, "
Removal and Installation".
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
(+)
(-) ACC
Connector Terminal
B72 4 Ground Battery voltage
ALNIA0364GB
Revision: March 2010 2008 QX56

AV-98
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
SUBWOOFER
4.SUBWOOFER AUDIO SIGNAL CHECK
1. Connect BOSE speaker amp. connec tor M112 and subwoofer connector B72.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal between BOSE speaker amp. harness connec- tor M112 terminals with CONS ULT-III or oscilloscope.
Is the audio signal voltage as specified?
YES >> Replace subwoofer. Refer to AV-172, "Removal and Installation".
NO >> GO TO 5
5.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 6
NO >> • Check connector housings for disconnected or loose terminals. • Repair harness or connector.
6.REAR DOOR SPEAKER SIGNAL CHECK
Connector Te r m i n a l s
Condition Reference
signal
(+) (-)
M112 9 14 Receive au-
dio signal
ALNIA0366GB
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: March 2010 2008 QX56

AV
SUBWOOFERAV-99
< 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-177,
"Removal and Installation".
NO >> Replace AV control unit. Refer to AV-164, "
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: March 2010
2008 QX56