display INFINITI QX56 2009 Factory Repair Manual

AV-66
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
U1300 AV COMM CIRCUIT
U1300 AV COMM CIRCUIT
DescriptionINFOID:0000000003776844
U1300 is indicated when malfunction occurs in communi
cation signal of multi AV system. Indicated simulta-
neously, without fail, with the malfunction of control units connected to AV control unit with communication line.
Determine the possible malfunction cause from the table below.
Self-diagnosis results display item
DTC Display contents of
CONSULT-III DTC Detection Condit
ion Possible causes
U1300 • AV COMM CIRCUIT [U1300] When AV control unit is not transmitting or receiving AV
communication signal for 2 seconds or more.
AV communication system.
Revision: December 20092009 QX56

AV
U1310 AV CONTROL UNITAV-67
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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U1310 AV CONTROL UNIT
DescriptionINFOID:0000000004110662
Replace the AV control unit if this DTC is displayed. Refer to AV-168, "Removal and Installation".
DTC LogicINFOID:0000000003776846
Part name Description
AV CONTROL UNIT • Integrates HDD (hard disk
drive) allowing map data and music data to be
stored.
• It is the master unit of the MULTI AV system, and it is connected to each control unit by means of communication. It operates each system according to com-
munication signals from the AV control unit.
• The AV control unit includes the audio, hands-free phone, voice control, navi- gation, and vehicle information functions.
• It is connected to ECM and combination meter via CAN communication to ob-
tain necessary information for the vehicle information function.
• It inputs the automatic brightness ON/OFF signals that are required for the dis- play dimming control.
• It inputs the signals for driving status recognition (vehicle speed, reverse and
parking brake).
DTC Display contents of
CONSULT-III DTC Detection Condition
Action to take
U1310 CONTROL UNIT (AV)
[U1310] An initial diagnosis error is detected in AV communication
circuit. Replace AV control unit. Refer to
AV-
168, "Removal and Installation".
Revision: December 20092009 QX56

AV
POWER SUPPLY AND GROUND CIRCUITAV-69
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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1. Ignition OFF.
2. Check continuity between AV control unit harness connectors M42 and M45 and ground.
Are the continuity results as specified?
YES >> Inspection End.
NO >> Repair AV control unit ground.
DISPLAY UNIT
DISPLAY UNIT : Diagnosis ProcedureINFOID:0000000003776848
1.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch to ACC
2. Check voltage between display unit harness connector M93 and ground.
Does specified voltage exist?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect display unit connector.
3. Check continuity between display unit harness connector M93 and ground.
Does continuity exist?
YES >> Inspection end.
NO >> Repair harness or connector.
A/C AND AV SWITCH ASSEMBLY
Connector (+)
(-)Continuity
Te r m i n a l
M42 20
Ground Yes
M45 65
67
86
87
AWNIA1555ZZ
Signal name Connector Terminal
Ignition switch
position Value (Approx.)
B+ M932
ACC Battery voltage
ACC 3
ALNIA0317GB
(+)
(-)Continuity
Connector Terminal
M93 1
Ground Yes
13
ALNIA0407GB
Revision: December 20092009 QX56

AV
POWER SUPPLY AND GROUND CIRCUITAV-75
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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VIDEO MONITOR : Diagnosis ProcedureINFOID:0000000003776855
1.CHECK POWER SUPPLY CIRCUIT
Check voltage between video monitor harness connector R202 and
ground.
Does specified voltage exist?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the video monitor connector R202 and the DVD player connector M205.
3. Check continuity between the video monitor harness connector R202 (A) and the DVD player connector M205 (B).
4. Check continuity between video monitor harness connector R202 (A) and ground.
Are continuity test results as specified?
YES >> Check DVD player power and ground supply. Refer to AV-68, "AV CONTROL UNIT : Diagnosis
Procedure".
NO >> Repair harness or connector.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect video monitor connector.
3. Check continuity between video monitor harness connector R202 and ground.
Does continuity exist?
YES >> Inspection end.
NO >> Repair harness or connector.
MICROPHONE
Signal name Connector Terminal Ignition switch
position Value (Approx.)
Display B+ R202 11
ACC 12V
12
ALNIA0328GB
AB Continuity
Connector Terminal Connector Terminal
R202 11
M205 9
Ye s
12 25
A -Con tin uit y
Connector Terminal
R202 11
Ground No
12
AWLIA1600ZZ
Connector Terminal Ignition switch position Continuity
R202 1
OFF Yes
2
ALNIA0329GB
Revision: December 20092009 QX56

AV
RGB (R: RED) SIGNAL CIRCUITAV-77
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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RGB (R: RED) SIGNAL CIRCUIT
DescriptionINFOID:0000000003776857
Transmit the image displayed with audio control unit with RGB signal to the display unit.
Diagnosis ProcedureINFOID:0000000003776858
1.CHECK CONTINUITY RGB (R: RED) 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 17 and AV control unit harness connector M43 (B)
terminal 21.
4. Check continuity between display unit harness connector M93 (A) terminal 17 and ground.
Are the continuity results as specified?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK RGB (R: RED) 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 17 and ground.
Are the voltage readings as specified?
YES >> Replace display unit. Refer to AV-170, "Removal and Installation".
NO >> Replace AV control unit. Refer to AV-168, "
Removal and Installation".
AB
Continuity
Connector Terminal Connector Terminal
M9317M4321 Yes
A —Continuity
Connector Terminal
M93 17Ground No
ALNIA0409GB
(+)
(-) Condition Reference signal
Connector Terminal
M93 17 Ground Receive
audio sig-
nal
ALNIA0383GB
SKIB2238J
Revision: December 20092009 QX56

AV-78
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
RGB (G: GREEN) SIGNAL CIRCUIT
RGB (G: GREEN) SI
GNAL CIRCUIT
DescriptionINFOID:0000000003776859
Transmit the image displayed with AV control unit with RGB signal to the display unit.
Diagnosis ProcedureINFOID:0000000003776860
1.CHECK CONTINUITY RGB (G: GREEN) 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 6 and AV control unit harness connector M43 (B)
terminal 22.
4. Check continuity between display unit harness connector M93 (A) terminal 6 and ground.
Are the continuity results as specified?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK RGB (G: GREEN) 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 6 and ground.
Are voltage readings as specified?
YES >> Replace display unit. Refer to AV-170, "Removal and Installation".
NO >> Replace AV control unit. Refer to AV-168, "
Removal and Installation".
AB
Continuity
Connector Terminal Connector Terminal
M936M4322 Yes
A —Continuity
Connector Terminal
M93 6Ground No
ALNIA0410GB
(+)
(-) Condition Reference signal
Connector Terminal
M93 6 Ground Receive
audio sig-
nal
ALNIA0385GB
SKIB2236J
Revision: December 20092009 QX56

AV
RGB (B: BLUE) SIGNAL CIRCUITAV-79
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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RGB (B: BLUE) SIGNAL CIRCUIT
DescriptionINFOID:0000000003776861
Transmit the image displayed with AV control unit with RGB signal to the display unit.
Diagnosis ProcedureINFOID:0000000003776862
1.CHECK CONTINUITY RGB (B : BLUE) 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 18 and AV control unit harness connector M43 (B)
terminal 23.
4. Check continuity between display unit harness connector M93 (A) terminal 18 and ground.
Are continuity results as specified?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK RGB (B: BLUE) 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 18 and ground.
Are voltage readings as specified?
YES >> Replace display unit. Refer to AV-170, "Removal and Installation".
NO >> Replace AV control unit. Refer to AV-168, "
Removal and Installation".
AB
Continuity
Connector Terminal Connector Terminal
M9318M4323 Yes
A —Continuity
Connector Terminal
M93 18Ground No
ALNIA0411GB
(+)
(-) Condition Reference signal
Connector Terminal
M93 18 Ground Receive
audio sig-
nal
ALNIA0387GB
SKIB2237J
Revision: December 20092009 QX56

AV-80
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
RGB SYNCHRONIZING SIGNAL CIRCUIT
RGB SYNCHRONIZING SIGNAL CIRCUIT
DescriptionINFOID:0000000003776863
Transmit the RGB synchronizing signal to the display unit so as to synchronize the RGB image displayed with
AV control unit.
Diagnosis ProcedureINFOID:0000000003776864
1.CHECK CONTINUITY RGB SYNCHRO
NIZING 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-170, "Removal and Installation".
NO >> Replace AV control unit. Refer to AV-168, "
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: December 20092009 QX56

AV
RGB AREA (YS) SIGNAL CIRCUITAV-81
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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RGB AREA (YS) SI GNAL CIRCUIT
DescriptionINFOID:0000000003776865
Transmits the display area of RGB image displayed by AV control unit with RGB area (YS) signal to display
unit.
Diagnosis ProcedureINFOID:0000000003776866
1.CHECK CONTINUITY RGB AR EA (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-170, "Removal and Installation".
NO >> Replace AV control unit. Refer to AV-168, "
Removal and Installation".
AB
Continuity
Connector Terminal Connector Terminal
M93 9M43 27 Yes
A —Contin u it y
Connector Terminal
M93 9Ground No
ALNIA0413GB
(+)
(-) Condition Reference signal
Connector Terminal
M93 9 Ground Receive
audio sig-
nal
ALNIA0391GB
PKIB4948J
Revision: December 20092009 QX56

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