2009 INFINITI QX56 audio

AV-82
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
HORIZONTAL SYNCHRONIZING (HP) SIGNAL CIRCUIT
HORIZONTAL SYNCHRONIZING (HP) SIGNAL CIRCUIT
DescriptionINFOID:0000000003776867
In composite image (AUX image, camera image), transmit the vertical synchronizing (VP) signal and horizon-
tal synchronizing (HP) signal from display unit to AV
control unit so as to synchronize the RGB images dis-
played with AV control unit such as the image quality adjusting menu, etc.
Diagnosis ProcedureINFOID:0000000003776868
1.CHECK CONTINUITY HORIZONTAL SY NCHRONIZING (HP) SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect display unit connector M93 and AV control unit con- nector M43.
3. Check continuity between display unit harness connector M93
(A) terminal 8 and AV control unit harness connector M43 (B)
terminal 28.
4. Check continuity between display unit harness connector M93 (A) terminal 8 and ground.
Are continuity results as specified?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK HORIZONTAL SYNCHRONIZING (HP) SIGNAL
1. Connect display unit connector M93 and AV control unit connec- tor M43.
2. Turn ignition switch ON.
3. Check signal between display unit harness connector M93 ter- minal 8 and ground.
Are voltage readings as specified?
YES >> Replace AV control unit. Refer to AV-168, "Removal and Installation".
NO >> Replace display unit. Refer to AV-170, "
Removal and Installation".
AB
Continuity
Connector Terminal Connector Terminal
M938M4328 Yes
A —Continuity
Connector Terminal
M93 8Ground No
ALNIA0414GB
(+)
(-) Condition Reference signal
Connector Terminal
M93 8 Ground Receive
audio sig-
nal
ALNIA0396GB
SKIB3601E
Revision: December 20092009 QX56

AV
VERTICAL SYNCHRONIZING (VP) SIGNAL CIRCUITAV-83
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
C
D
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F
G H
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K L
M B A
O P
VERTICAL SYNCHRONIZING (VP) SIGNAL CIRCUIT
DescriptionINFOID:0000000003776869
In composite image (AUX image, camera image), transmi t the vertical synchronizing (VP) signal and horizon-
tal synchronizing (HP) signal from display unit to AV control unit so as to synchronize the RGB images dis-
played with AV control unit such as the image quality adjusting menu, etc.
Diagnosis ProcedureINFOID:0000000003776870
1.CHECK CONTINUITY VERTICAL SINCHRO NIZING (VP) SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect display unit connector M93 and AV control unit con- nector M43.
3. Check continuity between display unit harness connector M93
(A) terminal 20 and AV control unit harness connector M43 (B)
terminal 29.
4. Check continuity between display unit harness connector M93 (A) terminal 20 and ground.
Are continuity results as specified?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK VERTICAL SINCHRONIZING (VP) SIGNAL
1. Connect display unit connector M93 and AV control unit connec-
tor M43.
2. Turn ignition switch ON.
3. Check signal between display unit harness connector M93 ter- minal 20 and ground.
Are voltage readings as specified?
YES >> Replace AV control unit. Refer to AV-168, "Removal and Installation".
NO >> Replace display unit. Refer to AV-170, "
Removal and Installation".
AB Continuity
Connector Terminal Connector Terminal
M9320M4329 Yes
A —Contin u it y
Connector Terminal
M93 20Ground No
ALNIA0415GB
(+)
(-) Condition Reference signal
Connector Terminal
M93 20 Ground Receive
audio sig-
nal
ALNIA0393GB
SKIB3598E
Revision: December 20092009 QX56

AV-84
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
FRONT DOOR SPEAKER
FRONT DOOR SPEAKER
DescriptionINFOID:0000000003776871
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 front door speakers using the audio signal circuits.
Diagnosis ProcedureINFOID:0000000003776872
1.HARNESS CHECK
1. Disconnect BOSE speaker amp. connector M112 and suspect speaker connector.
2. Check continuity between BOSE speaker amp. harness connec- tor M112 (A) and suspect speaker harness connector (B).
3. Check continuity between BOSE speaker amp. harness connec- tor M112 (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.FRONT SPEAKER SIGNAL CHECK
A B Continuity
Connector Terminal Connector Terminal
M112 4
D12 1
Ye s
52
8
D112 1
13 2
A —Con tin uit y
Connector Terminal
M112 4
Ground No
5
8
13
ALNIA0342GB
Revision: December 20092009 QX56

AV
FRONT DOOR SPEAKERAV-85
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
C
D
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F
G H
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K L
M B A
O P
1. Connect BOSE speaker amp. connector M112 and suspect speaker connector.
2. Turn ignition switch to ACC.
3. Push “POWER” switch.
4. Check the signal between BOSE speaker amp. harness connec- tor M112 terminals with CONSULT-III or oscilloscope.
Is audio signal voltage as specified?
YES >> Replace suspect speaker. Refer to AV-173, "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 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
Connec-
tor Te r m i n a l
Condition Reference
signal
(+) (-)
M112 45
Receive
audio sig-
nal
813
ALNIA0343GB
SKIA0177E
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
Revision: December 20092009 QX56

AV-86
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
FRONT DOOR SPEAKER
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 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 23
Receive
audio sig-
nal
11 1 2
ALNIA0417GB
SKIA0177E
Revision: December 20092009 QX56

AV
FRONT TWEETERAV-87
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
C
D
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F
G H
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K L
M B A
O P
FRONT TWEETER
DescriptionINFOID:0000000003776873
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 tweeters using the audio signal circuits.
Diagnosis ProcedureINFOID:0000000003776874
1.HARNESS CHECK
1. Disconnect BOSE speaker amp. connector M112 and suspect tweeter connector.
2. Check continuity between BOSE speaker amp. harness connec-
tor M112 (A) and suspect tweeter harness connector (B).
3. Check continuity between BOSE speaker amp. harness connec-
tor M112 (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.FRONT TWEETER SIGNAL CHECK
A B Continuity
Connector Terminal Connector Terminal
M112 4
D12 1
Ye s
52
8
D112 1
13 2
A —Contin u it y
Connector Terminal
M112 4
Ground No
5
8
13
ALNIA0342GB
Revision: December 20092009 QX56

AV-88
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
FRONT TWEETER
1. Connect BOSE speaker amp. connector M112 and suspect
tweeter connector.
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 audio signal voltage 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 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
Connec-
tor Te r m i n a l
Condition Reference
signal
(+) (-)
M112 45
Receive
audio sig-
nal
813
ALNIA0343GB
SKIA0177E
AB
Continuity
Connector Terminal Connector Terminal
M42 2
M113 18
Ye s
33
2
11 1 9
12 20
A —Contin u it y
Connector Terminal
M42 2
Ground No
3
11
12
ALNIA0416GB
Revision: December 20092009 QX56

AV
FRONT TWEETERAV-89
< 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 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".
ConnectorTe 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