display INFINITI QX56 2010 Factory Repair Manual

AV
U1250 CAMERA CONTROL UNITAV-63
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U1250 CAMERA CONTROL UNIT
DescriptionINFOID:0000000005146292
DTC LogicINFOID:0000000005146293
Diagnosis ProcedureINFOID:0000000005146294
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
1.CHECK CAMERA-CONNECTION RECOGNITION SIGNAL CIRCUIT
1. Disconnect AV control unit connector and camera control unit connector.
2. Check continuity between AV control unit harness connector M45 (A) terminal 84 and camera control unit harness connector
B73 (B) terminal 5.
3. Check continuity between AV control unit harness connector M45 (A) terminal 84 and ground.
Are the continuity results as specified?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK AV CONTROL UNIT VOLTAGE
Part name Description
CAMERA CONTROL UNIT • Camera image signal is input from rear view camera, and camera image is in-
dicated on the display.
• Power (camera ON signal) is sent to rear view camera.
• Controlled by audio communication sent from AV control unit.
• AV control unit recognizes the presence of camera system with camera con- nection recognition signal.
DTC Display contents of
CONSULT-III DTC Detection Condit
ion Possible causes
U1250 CAMERA CONT. CONN
[U1250] A malfunction is detected in camera-connection recogni-
tion signal circuit. Camera-connection recognition sig-
nal circuit.
AB
Continuity
Connector Terminal Connector Terminal
M45 84 B73 5 Yes
A —Con tin uit y
Connector Terminal
M45 84Ground No
ALNIA0401GB
Revision: April 20092010 QX56

AV
U1258 SATELLITE RADIO ANTENNAAV-65
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U1258 SATELLITE RADIO ANTENNA
DescriptionINFOID:0000000005146295
DTC LogicINFOID:0000000005146296
Diagnosis ProcedureINFOID:0000000005146297
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
1.SATELLITE RADIO ANTENNA CHECK
Visually check satellite radio antenna and antenna feeder.
Is inspection result OK?
YES >> GO TO 2.
NO >> Repair malfunctioning parts.
2.CHECK AV CONTROL UNIT VOLTAGE
1. Disconnect AV control unit connector M125.
2. Turn ignition switch ON.
3. Check voltage between AV control unit connector M125 termi- nal 118 and ground.
Is voltage approximately 5 volts?
YES >> Inspection end.
NO >> Replace AV control unit. Refer to AV-169, "
Removal and
Installation".
Part name Description
SATELLITE RADIO ANTENNA Satellite radio signal is received and sent to audio control unit.
DTCDisplay contents of
CONSULT-III DTC Detection Condit
ion Possible causes
U1258 XM ANETNNA CONN
[U1258] Satellite radio antenna connection malfunction is detect-
ed.
Satellite radio antenna disconnection.
118 - Ground
: Approx. 5 V
ALNIA0403GB
Revision: April 20092010 QX56

AV-66
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
U1300 AV COMM CIRCUIT
U1300 AV COMM CIRCUIT
DescriptionINFOID:0000000005146298
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: April 20092010 QX56

AV
U1310 AV CONTROL UNITAV-67
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U1310 AV CONTROL UNIT
DescriptionINFOID:0000000005146299
Replace the AV control unit if this DTC is displayed. Refer to AV-169, "Removal and Installation".
DTC LogicINFOID:0000000005146300
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-
169, "Removal and Installation".
Revision: April 20092010 QX56

AV
POWER SUPPLY AND GROUND CIRCUITAV-69
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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:0000000005146302
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
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.
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: April 20092010 QX56

AV
POWER SUPPLY AND GROUND CIRCUITAV-75
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1. Disconnect DVD player connector M205.
2. Check voltage between the DVD player connector M205 and ground.
Are the voltage results as specified?
YES >> GO TO 3.
NO >> • Check connector housings for disconnected or loose terminals. • Repair harness or connector.
3.GROUND CIRCUIT CHECK
1. Ignition OFF.
2. Check continuity between DVD player harness connector M205 terminal 5 and ground.
Are the continuity results as specified?
YES >> Inspection End.
NO >> Repair DVD player ground.
VIDEO MONITOR
VIDEO MONITOR : Diagnosis ProcedureINFOID:0000000005146309
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
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
(+) (-) OFF ACC ON
Connector Terminal
M205 21
Ground Batter volt-
age Battery
voltage Battery volt-
age
24 0VBattery
voltage Battery volt-
age
ALNIA0325GB
(+) (-)Continuity
Connector Terminal
M205 5Ground Yes
ALNIA0326GB
Signal name Connector Terminal Ignition switch
position Value (Approx.)
Display B+ R202 11
ACC 12V
12
ALNIA0328GB
Revision: April 20092010 QX56

AV-78
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
RGB (R: RED) SIGNAL CIRCUIT
RGB (R: RED) SIGNAL CIRCUIT
DescriptionINFOID:0000000005146311
Transmit the image displayed with audio control unit with RGB signal to the display unit.
Diagnosis ProcedureINFOID:0000000005146312
Regarding Wiring Diagram information, refer to
AV-116, "Wiring Diagram".
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-171, "Removal and Installation".
NO >> Replace AV control unit. Refer to AV-169, "
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: April 20092010 QX56

AV
RGB (G: GREEN) SIGNAL CIRCUITAV-79
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RGB (G: GREEN) SIGNAL CIRCUIT
DescriptionINFOID:0000000005146313
Transmit the image displayed with AV control unit with RGB signal to the display unit.
Diagnosis ProcedureINFOID:0000000005146314
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
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-171, "Removal and Installation".
NO >> Replace AV control unit. Refer to AV-169, "
Removal and Installation".
AB
Continuity
Connector Terminal Connector Terminal
M93 6M43 22 Yes
A —Contin u it y
Connector Terminal
M93 6Ground No
ALNIA0410GB
(+)
(-) Condition Reference signal
Connector Terminal
M93 6 Ground Receive
audio sig-
nal
ALNIA0385GB
SKIB2236J
Revision: April 20092010 QX56

AV-80
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
RGB (B: BLUE) SIGNAL CIRCUIT
RGB (B: BLUE) SIGNAL CIRCUIT
DescriptionINFOID:0000000005146315
Transmit the image displayed with AV control unit with RGB signal to the display unit.
Diagnosis ProcedureINFOID:0000000005146316
Regarding Wiring Diagram information, refer to
AV-116, "Wiring Diagram".
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-171, "Removal and Installation".
NO >> Replace AV control unit. Refer to AV-169, "
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: April 20092010 QX56

AV
RGB SYNCHRONIZING SIGNAL CIRCUITAV-81
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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