INFINITI QX56 2010 Factory Service Manual

AV-64
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
U1250 CAMERA CONTROL UNIT
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-189, "Removal
and Installation".
NO >> Replace AV control unit. Refer to AV-169, "
Removal and Installation".
ConnectorTe r m i n a l s
Voltag e
(+) (-)
M45 84 Ground Approx. 5V
ALNIA0402GB
Revision: April 20092010 QX56

AV
U1258 SATELLITE RADIO ANTENNAAV-65
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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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
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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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-68
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
AV CONTROL UNIT
AV CONTROL UNIT : Diagnosis ProcedureINFOID:0000000005146301
Regarding Wiring Diagram information, refer to
AV-116, "Wiring Diagram".
1.CHECK FUSES
Check that the following AV control unit fuses are not blown.
Are the fuses 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 AV control unit connectors M42 and M45.
2. Check voltage between the AV control unit connectors M42 and M45 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
Unit Terminals Signal name Fuse No.
AV c o n t r o l u n i t 19
Battery power 31
66
68
7 Ignition switch ACC or ON 4
69
79 Ignition switch ON or START 12
(+)
(-) OFF ACC ON
Connector Terminal
M42 7Ground0V
Battery
voltage Battery
voltage
19 Ground Battery
voltage Battery
voltage Battery
voltage
M45 66 Ground
Battery
voltage Battery
voltage Battery
voltage
68 Ground Battery
voltage Battery
voltage Battery
voltage
69 Ground 0V Battery
voltage Battery
voltage
79 Ground 0V 0V Battery
voltage
AWNIA1554ZZ
Revision: April 20092010 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: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-70
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
POWER SUPPLY AND GROUND CIRCUIT
NO >> Repair harness or connector.
A/C AND AV SWITCH ASSEMBLY
A/C AND AV SWITCH ASSEMBLY : Diagnosis ProcedureINFOID:0000000005146303
Regarding Wiring Diagram information, refer to
AV-116, "Wiring Diagram".
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.
BOSE SPEAKER AMP
BOSE SPEAKER AMP : Diagnosis ProcedureINFOID:0000000005146304
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
1.CHECK FUSE
Check that the BOSE speaker amp. fuse is not blown.
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: April 20092010 QX56

AV
POWER SUPPLY AND GROUND CIRCUITAV-71
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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Are the fuses OK?
YES >> GO TO 2.
NO >> Be sure to eliminate cause of malfunction before installing new fuse.
2.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BOSE speak er amp. connector.
3. Check voltage between BOSE speaker amp. harness connector M112 terminal 11 and ground.
Is battery voltage present?
YES >> GO TO 3.
NO >> Check harness between BOSE speaker amp. and fuse.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BOSE speak er amp. connector.
3. Check continuity between BOSE speaker amp. harness connec-
tor M112 terminal 12 and ground.
Does continuity exist?
YES >> Inspection End.
NO >> Repair harness or connector.
WOOFER
WOOFER : Diagnosis ProcedureINFOID:0000000005146305
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
1.CHECK FUSE
Check that the subwoofer fuse is not blown.
Is the fuse OK?
YES >> GO TO 2.
NO >> Be sure to eliminate cause of malfunction before installing new fuse.
2.CHECK POWER SUPPLY CIRCUIT
Unit Terminal Signal name Fuse No.
BOSE speaker amp. 11Battery power 31
(+)
(-) Voltage (approx.)
Connector Terminal
M112 11 Ground Battery voltage
ALNIA0339GB
(+) (-)Continuity
Connector Terminal
M112 12Ground Yes
ALNIA0340GB
Unit Terminal Signal name Fuse No.
Subwoofer 6Battery power 17
Revision: April 20092010 QX56

AV-72
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
POWER SUPPLY AND GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect subwoofer connector.
3. Check voltage between subwoofer harness connector B72 ter-
minal 6 and ground.
Is battery voltage present?
YES >> GO TO 3.
NO >> Check harness between subwoofer and fuse.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between subwoofer harness connector B72 terminal 5 and ground.
Does continuity exist?
YES >> Inspection End.
NO >> Repair harness or connector.
REAR VIEW CAMERA CONTROL UNIT
REAR VIEW CAMERA CONTRO L UNIT : Diagnosis ProcedureINFOID:0000000005146306
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
1.CHECK FUSE
Check that the following fuses of the rear view camera control unit are not blown.
Are the fuses OK?
YES >> GO TO 2.
NO >> Be sure to eliminate cause of malfunction before installing new fuse.
2.CHECK POWER SUPPLY CIRCUIT
Check voltage between rear view camera control unit harness con-
nector B73 and ground.
Are the voltage readings as specified?
YES >> GO TO 3.
NO >> Check harness between rear view camera control unit and fuse.
(+) (-) Voltage (approx.)
Connector Terminal
B72 6 Ground Battery voltage
ALNIA0367GB
(+) (-)Continuity
Connector Terminal
B72 5Ground Yes
ALNIA0368GB
Unit Terminals Signal name Fuse No.
Rear view camera control unit 1
Battery power 31
2 Ignition switch ACC or ON 4
Signal name Connector TerminalIgnition switch
position Value (Approx.)
Battery power supply B731OFF
Battery voltage
ACC power supply 2 ACC
ALLIA0244ZZ
Revision: April 20092010 QX56

AV
POWER SUPPLY AND GROUND CIRCUITAV-73
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
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3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear view camera control unit connector.
3. Check continuity between rear view camera control unit harness connector B31 terminal 3 and ground.
Does continuity exist?
YES >> Inspection End.
NO >> Repair harness or connector.
REAR VIEW CAMERA
REAR VIEW CAMERA : Diagnosis ProcedureINFOID:0000000005146307
Regarding Wiring Diagram information, refer to AV-116, "Wiring Diagram".
1.CHECK POWER SUPPLY CIRCUIT (REAR VIEW CAMERA SIDE)
Check voltage between rear view camera harness connector D504
and ground.
Is voltage reading approximately 6 volts?
YES >> GO TO 4.
NO >> GO TO 2.
2.CHECK POWER SUPPLY CIRCUIT (CONTINUITY)
1. Turn ignition switch OFF.
2. Disconnect rear view camera and rear view camera control unit connectors.
3. Check continuity between rear view camera harness connector D504 (A) terminal 1 and rear view camera control unit harness
connector B73 (B) terminal 8.
4. Check continuity between rear view camera harness connector D504 (A) terminal 1 and ground.
Are continuity test results as specified?
YES >> GO TO 3.
NO >> Repair harness or connector.
(+) (-) Continuity
Connector Terminal
B31 3 Ground Yes
ALLIA0245ZZ
Signal name Connector Terminal Transmission
position Value (Approx.)
Camera ON signal D504 1 Reverse 6V
ALLIA0243ZZ
AB
Continuity
Connector Terminal Connector Terminal
D504 1 B73 8 Yes
A —Continuity
Connector Terminal
D504 1 Ground No
ALLIA0246ZZ
Revision: April 20092010 QX56