2011 INFINITI QX56 ground

AV-178
< DTC/CIRCUIT DIAGNOSIS >
MICROPHONE SIGNAL CIRCUIT
MICROPHONE SIGNAL CIRCUIT
DescriptionINFOID:0000000006216346
Supply power from AV control unit to microphone. The microphone transmits the sound/voice to the AV control
unit.
Diagnosis ProcedureINFOID:0000000006216347
1.CHECK CONTINUITY BETWEEN AV CO NTROL UNIT AND MICROPHONE CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect AV control unit connector and microphone connector.
3. Check continuity between AV control uni t harness connector and microphone harness connector.
4. Check continuity between AV c ontrol unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK VOLTAGE MICROPHONE VCC
1. Connect AV control unit connector.
2. Turn ignition switch ON.
3. Check voltage between AV control unit harness connector.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Replace AV control unit. Refer to AV-212, "
Removal and Installation".
3.CHECK MICROPHONE SIGNAL
1. Connect microphone connector.
2. Check signal between AV control unit harness connector.
AV control unit Microphone Continuity
Connector Terminals Connector Terminals
M210 71
R17 2
Existed
72 4
87 1
AV c o n t r o l u n i t GroundContinuity
Connector Terminals
M210 72
Not existed
87
(+) ( −)
Vo l ta g e
(Approx.)
AV c o n t r o l u n i t
Ground
Connector Terminal
M210 72 5.0 V
Revision: 2010 May2011 QX56

AV-180
< DTC/CIRCUIT DIAGNOSIS >
CAMERA IMAGE SIGNAL CIRCUIT
CAMERA IMAGE SIGNAL CIRCUIT
DescriptionINFOID:0000000006216348
Around view monitor control unit supplies to the front camera, rear camera and side camera. And then it
superimpose the images from each camera and outputs then to the front display unit.
Diagnosis ProcedureINFOID:0000000006216349
1.CHECK CONTINUITY CAMERA IMAGE SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front display unit connector and around view monitor control unit connector.
3. Check continuity between front display unit harne ss connector and around view monitor control unit har-
ness connector.
4. Check continuity between front display unit harness connector and ground.
Is inspection result normal?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK CAMERA IMAGE SIGNAL
1. Connect front display unit connector and around view monitor control unit connector.
2. Turn ignition switch ON.
3. Check signal between front display unit harness connector and ground.
Is inspection result normal?
YES >> Replace front display unit. Refer to AV-212, "Removal and Installation".
NO >> Replace around view monitor control unit. Refer to AV-233, "
Removal and Installation".
Front display unitAround view monitor control
unit Continuity
Connector Terminal Connector Terminal
M215 8 M48 27 Existed
Front display unit GroundContinuity
Connector Terminal
M215 8 Not existed
(+) (− ) Condition Reference value
Front display unit
Connector Terminal
M215 8 Ground At camera image is dis-
played.
SKIB2251J
Revision: 2010 May2011 QX56

AV
FRONT CAMERA COMMUNICATION SIGNAL CIRCUITAV-181
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
K L
M B A
O P
FRONT CAMERA COMMUNICATION SIGNAL CIRCUIT
DescriptionINFOID:0000000006216350
 Around view monitor control unit supplies to the front camera, rear camera and side camera. And then it
superimpose the images from each camera and outputs then to the front display unit.
 Superimpose the guiding lines, predictive course line and sonar indicator to the camera image that outputs
to the front display unit.
 Around view monitor control unit performs the rec eption/transmission of communication signal with each
camera.
Diagnosis ProcedureINFOID:0000000006216351
1.CHECK CONTINUITY COMMUNI CATION SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect around view monitor control unit connector and front camera connector.
3. Check continuity between around view monitor c ontrol unit harness connector and front camera harness
connector.
4. Check continuity between around view monitor control unit harness connector and ground.
Is inspection result normal?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK COMMUNICATION SIGNAL
1. Connect around view monitor control uni t connector and front camera connector.
2. Turn ignition switch ON.
3. Check signal between around view monitor control unit harness connector and ground.
Is inspection result normal?
YES >> Replace around view monitor control unit. Refer to AV-233, "Removal and Installation".
NO >> Replace front camera. Refer to AV-234, "
Removal and Installation".
Around view monitor control
unit Front camera
Continuity
Connector Terminal Connector Terminal
M49 45 E50 6 Existed
Around view monitor control unit GroundContinuity
Connector Terminal
B49 45 Not existed
(+)
(− ) Condition Reference value
Around view monitor control
unit
Connector Terminal
M49 45 Ground “CAMERA” switch is ON or shift
position is “R”.
JSNIA0836GB
Revision: 2010 May2011 QX56

AV-182
< DTC/CIRCUIT DIAGNOSIS >
FRONT CAMERA IMAGE SIGNAL CIRCUIT
FRONT CAMERA IMAGE SIGNAL CIRCUIT
DescriptionINFOID:0000000006216352
 Around view monitor control unit supplies to the front camera, rear camera and side came\
ra. And then itsuperimpose the images from each camera and outputs then to the front display unit.
 Superimpose the guiding lines, predictive course line and sonar indicator to the camera image that outputs
to the front display unit.
 Around view monitor control unit performs the rec eption/transmission of communication signal with each
camera.
Diagnosis ProcedureINFOID:0000000006216353
1.CHECK CONTINUITY FRONT CAMERA POWER SUPPLY AND GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect around view monitor control unit connector and front camera connector.
3. Check continuity between around view monitor c ontrol unit harness connector and front camera harness
connector.
4. Check continuity between around view m onitor control unit harness connector and ground.
Is inspection result normal?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK VOLTAGE FRONT CAMERA POWER SUPPLY
1. Connect around view monitor control unit connector and front camera connector.
2. Turn ignition switch ON.
3. Check voltage between around view m onitor control unit harness connector.
Is inspection result normal?
YES >> GO TO 3.
NO >> Replace around view monitor control unit. Refer to AV-233, "
Removal and Installation".
3.CHECK CONTINUITY FRONT CAMERA IMAGE SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect around view monitor control unit connector and front camera connector.
3. Check continuity between around view monitor c ontrol unit harness connector and front camera harness
connector.
Around view monitor control
unit Front camera
Continuity
Connector Terminals Connector Terminals
M49 44
E50 2
Existed
46 1
Around view monitor control unit GroundContinuity
Connector Terminal
M49 46 Not existed
(+)
(− ) Condition Vo l ta g e
(Approx.)
Around view monitor control
unit
Connector Terminal
M49 46 Ground “CAMERA” switch is ON or
shift position is “R”.
6.0 V
Revision: 2010 May2011 QX56

AV
FRONT CAMERA IMAGE SIGNAL CIRCUITAV-183
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
K L
M B A
O P4. Check continuity between around view monitor control unit harness connector and ground.
Is inspection result normal?
YES >> GO TO 4.
NO >> Repair harness or connector.
4.CHECK FRONT CAMERA IMAGE SIGNAL
1. Connect around view monitor control uni t connector and front camera connector.
2. Turn ignition switch ON.
3. Check signal between around view monitor control unit harness connector.
Is inspection result normal?
YES >> Replace around view monitor control unit. Refer to AV-233, "Removal and Installation".
NO >> Replace front camera. Refer to AV-234, "
Removal and Installation".
Around view monitor control
unit Front camera
Continuity
Connector Terminals Connector Terminals
M49 41
E50 3
Existed
42 4
Around view monitor control unit GroundContinuity
Connector Terminals
M49 41, 42 Not existed
(+) ( −)
Condition Reference value
Around view monitor control unit
Connector Terminal Connector Terminal
M4941M4942 “CAMERA” switch is ON or
shift position is “R”.
JSNIA0834GB
Revision: 2010 May2011 QX56

AV-184
< DTC/CIRCUIT DIAGNOSIS >
REAR CAMERA COMMUNICATION SIGNAL CIRCUIT
REAR CAMERA COMMUNICATION SIGNAL CIRCUIT
DescriptionINFOID:0000000006216354
 Around view monitor control unit supplies to the front camera, rear camera and side came\
ra. And then it
superimpose the images from each camera and outputs then to the front display unit.
 Superimpose the guiding lines, predictive course line and sonar indicator to the camera image that outputs
to the front display unit.
 Around view monitor control unit performs the rec eption/transmission of communication signal with each
camera.
Diagnosis ProcedureINFOID:0000000006216355
1.CHECK CONTINUITY COMMUNI CATION SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect around view monitor control un it connector and rear camera connector.
3. Check continuity between around view monitor control unit harness connector and rear camera harness connector.
4. Check continuity between around view m onitor control unit harness connector and ground.
Is inspection result normal?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK COMMUNICATION SIGNAL
1. Connect around view monitor control unit connector and rear camera connector.
2. Turn ignition switch ON.
3. Check signal between around view monitor control unit harness connector and ground.
Is inspection result normal?
YES >> Replace around view monitor control unit. Refer to AV-233, "Removal and Installation".
NO >> Replace rear camera. Refer to AV-235, "
Removal and Installation".
Around view monitor control
unit Rear camera
Continuity
Connector Terminal Connector Terminal
M48 35 D164 4 Existed
Around view monitor control unit GroundContinuity
Connector Terminal
M48 35 Not existed
(+)
(− ) Condition Reference value
Around view monitor control
unit
Connector Terminal
M48 35 Ground “CAMERA” switch is ON or shift
position is “R”.
JSNIA0836GB
Revision: 2010 May2011 QX56

AV
REAR CAMERA IMAGE SIGNAL CIRCUITAV-185
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
K L
M B A
O P
REAR CAMERA IMAGE SIGNAL CIRCUIT
DescriptionINFOID:0000000006216356
 Around view monitor control unit supplies to the front camera, rear camera and side camera. And then it
superimpose the images from each camera and outputs then to the front display unit.
 Superimpose the guiding lines, predictive course line and sonar indicator to the camera image that outputs
to the front display unit.
 Around view monitor control unit performs the rec eption/transmission of communication signal with each
camera.
Diagnosis ProcedureINFOID:0000000006216357
1.CHECK CONTINUITY REAR CAMERA POWER SUPPLY AND GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect around view monitor control unit connector and rear camera connector.
3. Check continuity between around view monitor c ontrol unit harness connector and rear camera harness
connector.
4. Check continuity between around view monitor control unit harness connector and ground.
Is inspection result normal?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK VOLTAGE REAR CAMERA POWER SUPPLY
1. Connect around view monitor control unit connector and rear camera connector.
2. Turn ignition switch ON.
3. Check voltage between around view monitor control unit harness connector and ground.
Is inspection result normal?
YES >> GO TO 3.
NO >> Replace around view monitor control unit. Refer to AV-233, "
Removal and Installation".
3.CHECK CONTINUITY REAR CAMERA IMAGE SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect around view monitor control unit connector and rear camera connector.
3. Check continuity between around view monitor c ontrol unit harness connector and rear camera harness
connector.
Around view monitor control
unit Rear camera
Continuity
Connector Terminals Connector Terminals
M48 36
D164 8
Existed
38 7
Around view monitor control unit GroundContinuity
Connector Terminal
M48 36 Not existed
(+)
(− ) Condition Vo l ta g e
(Approx.)
Around view monitor control
unit
Connector Terminal
M48 36 Ground “CAMERA” switch is ON or
shift position is “R”.
6.0 V
Revision: 2010 May2011 QX56

AV-186
< DTC/CIRCUIT DIAGNOSIS >
REAR CAMERA IMAGE SIGNAL CIRCUIT
4. Check continuity between around view monitor control unit harness connector and ground.
Is inspection result normal?
YES >> GO TO 4.
NO >> Repair harness or connector.
4.CHECK REAR CAMERA IMAGE SIGNAL
1. Connect around view monitor control unit connector and rear camera connector.
2. Turn ignition switch ON.
3. Check signal between around view monitor control unit harness connector.
Is inspection result normal?
YES >> Replace around view monitor control unit. Refer to AV-233, "Removal and Installation".
NO >> Replace rear camera. Refer to AV-235, "
Removal and Installation".
Around view monitor control
unit Rear camera
Continuity
Connector Terminals Connector Terminals
M48 39
D164 5
Existed
40 1
Around view monitor control unit GroundContinuity
Connector Terminals
M48 39, 40 Not existed
(+) ( −)
Condition Reference value
Around view monitor control unit
Connector Terminal Connector Terminal
M48 39 M48 40 “CAMERA” switch is ON or
shift position is “R”.
JSNIA0834GB
Revision: 2010 May2011 QX56