2008 INFINITI QX56 display

AV-58
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
U1250 CAMERA CONTROL UNIT
U1250 CAMERA CONTROL UNIT
DescriptionINFOID:0000000001696088
DTC LogicINFOID:0000000001696089
Diagnosis ProcedureINFOID:0000000001696090
1.CHECK CAMERA-CONNECTION RE
COGNITION 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
1. Connect AV control unit connector.
2. Turn ignition switch ON.
3. Check voltage between AV control unit harness connector M45 terminal 84 and ground.
Is voltage approximately 5 volts?
YES >> Replace camera control unit. Refer to AV-184, "Removal
and Installation".
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 Condition
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 —Contin u it y
Connector Terminal
M45 84Ground No
ALNIA0401GB
Connector Te r m i n a l s
Voltag e
(+) (-)
M45 84 Ground Approx. 5V
ALNIA0402GB
Revision: March 2010 2008 QX56

AV-60
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
U1258 SATELLITE RADIO ANTENNA
U1258 SATELLITE RADIO ANTENNA
DescriptionINFOID:0000000001696091
DTC LogicINFOID:0000000001696092
Diagnosis ProcedureINFOID:0000000001696093
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-164, "
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 Condition
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: March 2010 2008 QX56

AV
U1300 AV COMM CIRCUITAV-61
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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U1300 AV COMM CIRCUIT
DescriptionINFOID:0000000001696094
U1300 is indicated when malfunction occurs in communica tion signal of multi AV system. Indicated simulta-
neously, without fail, with the malfunction of control uni ts 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 Condition
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: March 2010
2008 QX56

AV-62
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
U1310 AV CONTROL UNIT
U1310 AV CONTROL UNIT
DescriptionINFOID:0000000001696095
Replace the AV control unit if this DTC is displayed. Refer to
AV-164, "Removal and Installation".
DTC LogicINFOID:0000000001696096
Part name Description
AV CONTROL UNIT • 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.
• AV control unit includes audio function and vehicle information function.
• 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-
164, "Removal and Installation".
Revision: March 2010 2008 QX56

AV-64
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
POWER SUPPLY AND GROUND CIRCUIT
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:0000000001696098
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 3
NO >> GO TO 2
2.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the display unit connector M93 and the AV control unit connector M45.
3. Check continuity between the display unit harness connector M93 (A) and the AV control unit connector M45 (B).
Does continuity exist?
YES >> Check AV control unit power and ground supply. Refer to AV-63, "AV CONTROL UNIT : Diagno-
sis Procedure".
NO >> Repair harness or connector.
Connector (+)
(-)Continuity
Te r m i n a l
M42 20
Ground Yes
M45 65
66
ALNIA0405GB
Signal name
Connector
No. Te r m i n a l
No. Ignition switch
position Value (Approx.)
B+ M932
ACC 9V
ACC 3
ALNIA0317GB
AB
Continuity
Connector Terminal Connector Terminal
M93 2
M45 66
Ye s
36 9
ALNIA0406GB
Revision: March 2010 2008 QX56

AV
POWER SUPPLY AND GROUND CIRCUITAV-65
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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3.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
A/C AND AV SWITCH ASSEMB LY : Diagnosis ProcedureINFOID:0000000001696099
1.CHECK FUSE
Check that the A/C and AV switch assembly fuse is not blown.
Is the fuse OK?
YES >> GO TO 2
NO >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
2.POWER SUPPLY CIRCUIT CHECK
1. Disconnect A/C and AV switch assembly connector M98.
2. Check voltage between the A/C and AV switch assembly con- nector M98 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 A/C and AV switch assembly harness
connector M98 and ground.
Are the continuity results as specified?
YES >> Inspection End.
NO >> Repair A/C and AV switch assembly ground.
(+) (-)Continuity
Connector Terminal
M93 1
Ground Yes
13
ALNIA0407GB
Unit Terminal Signal name Fuse No.
A/C and AV switch assembly 2Ignition switch ACC or ON 4
(+)
(-) OFF ACC ON
Connector Terminal
M98 2 Ground 0V Battery
voltage Battery
voltage
ALNIA0315GB
(+) (-) Continuity
Connector Terminal
M98 1 Ground Yes
ALNIA0316GB
Revision: March 2010 2008 QX56

AV-70
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
POWER SUPPLY AND GROUND CIRCUIT
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:0000000001696105
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-63, "AV CONTROL UNIT : Diagnosis
Procedure".
NO >> Repair harness or connector.
3.CHECK GROUND CIRCUIT
(+) (-) Continuity
Connector Terminal
M205 5 Ground Yes
ALNIA0326GB
Signal name Connector
No. Te r m i n a l
No. 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 -Contin u it y
Connector Terminal
R202 11
Ground No
12
ALNIA0327GB
Revision: March 2010 2008 QX56

AV
RGB (R: RED) SIGNAL CIRCUITAV-73
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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RGB (R: RED) SIGNAL CIRCUIT
DescriptionINFOID:0000000001696107
Transmit the image displayed with audio control unit with RGB signal to the display unit.
Diagnosis ProcedureINFOID:0000000001696108
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-166, "Removal and Installation".
NO >> Replace AV control unit. Refer to AV-164, "
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: March 2010
2008 QX56