2010 INFINITI QX56 air condition

AV
RGB SYNCHRONIZING SIGNAL CIRCUITAV-81
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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RGB SYNCHRONIZING SIGNAL CIRCUIT
DescriptionINFOID:0000000005146317
Transmit the RGB synchronizing signal to the display uni t so as to synchronize the RGB image displayed with
AV control unit.
Diagnosis ProcedureINFOID:0000000005146318
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
1.CHECK CONTINUITY RGB SYNCHRONIZING 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 19 and AV control unit harness connector M43 (B)
terminal 25.
4. Check continuity between display unit harness connector M93 (A) terminal 19 and ground.
Are continuity results as specified?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK RGB SYNCHRONIZING 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 19 and ground.
Are voltage readings as specified?
YES >> Replace display unit. Refer to AV-171, "Removal and Installation".
NO >> Replace AV control unit. Refer to AV-169, "
Removal and Installation".
AB
Continuity
Connector Terminal Connector Terminal
M9319M4325 Yes
A —Continuity
Connector Terminal
M93 19Ground No
ALNIA0412GB
(+)
(-) Condition Reference signal
Connector Terminal
M93 19 Ground Receive
audio sig-
nal
ALNIA0389GB
SKIB3603E
Revision: April 20092010 QX56

AV-82
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
RGB AREA (YS) SIGNAL CIRCUIT
RGB AREA (YS) SIGNAL CIRCUIT
DescriptionINFOID:0000000005146319
Transmits the display area of RGB image displayed by
AV control unit with RGB area (YS) signal to display
unit.
Diagnosis ProcedureINFOID:0000000005146320
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
1.CHECK CONTINUITY RGB AREA (YS) 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 9 and AV control unit harness connector M43 (B)
terminal 27.
4. Check continuity between display unit harness connector M93 (A) terminal 9 and ground.
Are continuity results as specified?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK RGB SYNCHRONIZING 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 9 and ground.
Are voltage readings as specified?
YES >> Replace display unit. Refer to AV-171, "Removal and Installation".
NO >> Replace AV control unit. Refer to AV-169, "
Removal and Installation".
AB
Continuity
Connector Terminal Connector Terminal
M939M4327 Yes
A —Continuity
Connector Terminal
M93 9Ground No
ALNIA0413GB
(+)
(-) Condition Reference signal
Connector Terminal
M93 9 Ground Receive
audio sig-
nal
ALNIA0391GB
PKIB4948J
Revision: April 20092010 QX56

AV
HORIZONTAL SYNCHRONIZING (HP) SIGNAL CIRCUITAV-83
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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HORIZONTAL SYNCHRONIZING (HP) SIGNAL CIRCUIT
DescriptionINFOID:0000000005146321
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:0000000005146322
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
1.CHECK CONTINUITY HORIZONTAL SYNCHRONIZING (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-169, "Removal and Installation".
NO >> Replace display unit. Refer to AV-171, "
Removal and Installation".
AB Continuity
Connector Terminal Connector Terminal
M93 8M43 28 Yes
A —Contin u it y
Connector Terminal
M93 8Ground No
ALNIA0414GB
(+)
(-) Condition Reference signal
Connector Terminal
M93 8 Ground Receive
audio sig-
nal
ALNIA0396GB
SKIB3601E
Revision: April 20092010 QX56

AV-84
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
VERTICAL SYNCHRONIZING
(VP) SIGNAL CIRCUIT
VERTICAL SYNCHRONIZING (VP) SIGNAL CIRCUIT
DescriptionINFOID:0000000005146323
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:0000000005146324
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
1.CHECK CONTINUITY VERTICAL SINCHRONIZING (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-169, "Removal and Installation".
NO >> Replace display unit. Refer to AV-171, "
Removal and Installation".
AB
Continuity
Connector Terminal Connector Terminal
M9320M4329 Yes
A —Continuity
Connector Terminal
M93 20Ground No
ALNIA0415GB
(+)
(-) Condition Reference signal
Connector Terminal
M93 20 Ground Receive
audio sig-
nal
ALNIA0393GB
SKIB3598E
Revision: April 20092010 QX56

AV-86
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
FRONT DOOR SPEAKER
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 CONS ULT-III or oscilloscope.
Is audio signal voltage 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 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: April 20092010 QX56

AV
FRONT TWEETERAV-89
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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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 CONSULT-III or oscilloscope.
Is audio signal voltage as specified?
YES >> Replace suspect tweeter. Refer to AV-172, "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: April 20092010 QX56

AV
CENTER SPEAKERAV-91
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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CENTER SPEAKER
DescriptionINFOID:0000000005146329
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:0000000005146330
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
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 CONSULT-III or oscilloscope.
Is the audio signal voltage reading as specified?
A B Continuity
Connector Terminal Connector Terminal
M113 15
M110 1
Ye s
28 2
A —Contin u it 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: April 20092010 QX56

AV-92
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
CENTER SPEAKER
YES >> Replace center 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
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-182,
"Removal and Installation".
NO >> Replace AV control unit. Refer to AV-169, "
Removal and
Installation".
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
Connector Te r m i n a l s
Condition Reference
signal
(+) (-)
M42 23
Receive
audio sig-
nal
11 1 2
ALNIA0417GB
SKIA0177E
Revision: April 20092010 QX56