ignition INFINITI QX56 2009 Factory Service Manual

AV
U1243 DISPLAY UNITAV-61
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3.CHECK COMMUNICATION 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 11 and ground.
Are voltage readings as specified?
YES >> GO TO 4.
NO >> Replace AV control unit. Refer to AV-168, "
Removal and Installation".
4.CHECK COMMUNICATION SIGNAL
Check signal between display unit harness connector M93 terminal
22 and ground.
Are voltage readings as specified?
YES >> Inspection end.
NO >> Replace display unit. Refer to AV-170, "
Removal and Installation".
Connector Te r m i n a l s
Reference Signal
(+) (-)
M93 11 Ground
ALNIA0398GB
PKIB5039J
Connector Te r m i n a l s
Reference Signal
(+) (-)
M93 22 Ground
ALNIA0399GB
PKIB5039J
Revision: December 20092009 QX56

AV-62
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
U1244 GPS ANTENNA
U1244 GPS ANTENNA
DescriptionINFOID:0000000003776835
DTC LogicINFOID:0000000003776836
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000003776837
1.GPS ANTENNA CHECK
Inspect GPS antenna and antenna feeder for damage or poor connection.
Is the GPS antenna and feeder clean and undamaged?
YES >> GO TO 2.
NO >> Repair or replace malfunctioning parts.
2.CHECK AV CONTROL UNIT VOLTAGE
1. Turn ignition switch ON.
2. Check voltage between AV control unit connector M124 terminal 116 and ground.
Is the voltage reading as specified?
YES >> Replace GPS antenna. Refer to AV-185, "Removal and
Installation".
NO >> Replace AV control unit. Refer to AV-168, "
Removal and
Installation".
Part Name Description
GPS ANTENNA GPS signal is detected and transmitted to the AV control unit.
DTC CONSULT-III display Detection condition
U1244 GPS ANTENNA CONN
[U1244]
GPS antenna connection malfunction is detected.
116 - Ground
: Approx. 5V
ALNIA0400GB
Revision: December 20092009 QX56

AV
U1250 CAMERA CONTROL UNITAV-63
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U1250 CAMERA CONTROL UNIT
DescriptionINFOID:0000000003776838
DTC LogicINFOID:0000000003776839
Diagnosis ProcedureINFOID:0000000003776840
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-188, "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 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
Connector Te r m i n a l s
Vo l ta g e
(+) (-)
M45 84 Ground Approx. 5V
ALNIA0402GB
Revision: December 20092009 QX56

AV
U1258 SATELLITE RADIO ANTENNAAV-65
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U1258 SATELLITE RADIO ANTENNA
DescriptionINFOID:0000000003776841
DTC LogicINFOID:0000000003776842
Diagnosis ProcedureINFOID:0000000003776843
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-168, "
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: December 20092009 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:0000000003776847
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: December 20092009 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: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-70
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
POWER SUPPLY AND GROUND CIRCUIT
A/C AND AV SWITCH ASSEMBLY : Diagnosis Procedure
INFOID:0000000003776849
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:0000000003776850
1.CHECK FUSE
Check that the BOSE speaker amp. fuse is 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
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
Unit Terminal Signal name Fuse No.
BOSE speaker amp. 11Battery power 31
Revision: December 20092009 QX56

AV
POWER SUPPLY AND GROUND CIRCUITAV-71
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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:0000000003776851
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
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
(+) (-) 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
(+)
(-) Voltage (approx.)
Connector Terminal
B72 6 Ground Battery voltage
ALNIA0367GB
Revision: December 20092009 QX56

AV-72
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
POWER SUPPLY AND 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:0000000003776852
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.
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
(+) (-)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
(+)
(-) Continuity
Connector Terminal
B31 3 Ground Yes
ALLIA0245ZZ
Revision: December 20092009 QX56

AV
POWER SUPPLY AND GROUND CIRCUITAV-73
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REAR VIEW CAMERA : Diagnosis ProcedureINFOID:0000000003776853
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.
3.CHECK POWER SUPPLY CIRCUIT (REAR VIEW CAMERA CONTROL UNIT SIDE)
1. Connect rear view camera control unit harness connector.
2. Turn ignition switch ON.
3. Check voltage between rear view camera control unit harness connector B73 and ground.
Is voltage reading approximately 6 volts?
YES >> Inspection End.
NO >> Replace rear view camera control unit. Refer to AV-188,
"Removal and Installation".
4.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear view camera harness connector.
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
Signal name Connector Terminal Transmission
position Value (Approx.)
Camera ON signal B73 8 Reverse 6V
ALLIA0247ZZ
Revision: December 20092009 QX56