INFINITI QX56 2011 Factory Service Manual
Manufacturer: INFINITI, Model Year: 2011, Model line: QX56, Model: INFINITI QX56 2011Pages: 5598, PDF Size: 94.53 MB
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AV
POWER SUPPLY AND GROUND CIRCUITAV-163
< DTC/CIRCUIT DIAGNOSIS >
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Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair harness or connector.
VIDEO DISTRIBUTOR
VIDEO DISTRIBUTOR : Diagnosis ProcedureINFOID:0000000006216322
1.CHECK FUSE
Check for blown fuses.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Be sure to eliminate cause of malfunction before installing new fuse.
2.CHECK POWER SUPPLY CIRCUIT
Check voltage between video distributor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check harness between video distributor and fuse.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect video distributor connector.
3. Check continuity between video distributor harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair harness or connector.
BOSE AMP.
BOSE AMP. : Diagnosis ProcedureINFOID:0000000006216323
1.CHECK FUSE
Check for blown fuses.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Be sure to eliminate cause of malfunction before installing new fuse.
2.CHECK POWER SUPPLY CIRCUIT
Power source Fuse No.
Battery 35
Ignition switch ACC or ON 19
Signal name Connector Terminal Ignition switch position Value (Approx.)
Battery power supply M217 2 OFF Battery voltage ACC power supply M217 4 ACC Battery voltage
Signal name Connector Terminal Ignition switch position Continuity Ground M217 1 OFF Existed
Ground M217 3 OFF Existed
Power source Fuse No. Battery 5
Battery 8
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AV-164
< DTC/CIRCUIT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
Check voltage between BOSE amp. harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check harness between BOSE amp. and fuse.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BOSE amp. connector.
3. Check continuity between BOSE amp. harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair harness or connector.
AROUND VIEW MONITOR CONTROL UNIT
AROUND VIEW MONITOR CONTRO L UNIT : Diagnosis ProcedureINFOID:0000000006216324
1.CHECK FUSE
Check for blown fuses.
Is inspection result normal?
YES >> GO TO 2.
NO >> Be sure to eliminate cause of malfunction before installing new fuse.
2.CHECK POWER SUPPLY CIRCUITS
Check voltage between around view monitor control unit harness connector and ground.
Is inspection result normal?
YES >> GO TO 3.
NO >> Check harness between around view monitor control unit and fuse.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect around view monitor control unit connector.
3. Check continuity between around view m onitor control unit harness connector and ground.
Is inspection result normal?
YES >> INSPECTION END
NO >> Repair harness or connector.
Signal name Connector Terminal Ignition switch position Value (Approx.)
Battery power supply B229 10 OFF Battery voltage
Battery power supply B229 11 OFF Battery voltage
Signal name Connector Terminal Ignition switch position Continuity Ground B229 12 OFF Existed
Power source Fuse No. Battery 9
Ignition switch ACC 19
Signal name Connector Terminal Ignition switch position Value (Approx.)
Battery power supply M4 82OFFBattery voltage
ACC power supply M48 4 ACC Battery voltage
Signal name Connector Terminal Ignition switch position Continuity
Ground M48 1 OFF Existed
Revision: 2010 May2011 QX56
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AV
POWER SUPPLY AND GROUND CIRCUITAV-165
< DTC/CIRCUIT DIAGNOSIS >
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SONAR CONTROL UNIT (WITH AROUND VIEW MONITOR)
SONAR CONTROL UNIT (WITH AROUND VIEW MONITOR) : Diagnosis Procedure
INFOID:0000000006216325
1.CHECK FUSE
Check for blown fuses.
Is the inspection result normal?
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 ON.
2. Check voltage between sonar control unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace sonar control unit power supply harness.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect sonar control unit connector.
3. Check continuity between sonar control unit harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair or replace sonar control unit ground harness.
Power source Fuse No.
Ignition switch ACC or ON 19
Signal name Connector Terminal Ignition switch position Value (Approx.)
Battery power supply M47 13 ACC Battery voltage
Signal name Connector Terminal Ignition switch position Continuity Ground M47 24 OFF Existed
Revision: 2010 May2011 QX56
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AV-166
< DTC/CIRCUIT DIAGNOSIS >
RGB DIGITAL IMAGE SIGNAL CIRCUIT
RGB DIGITAL IMAGE SIGNAL CIRCUIT
DescriptionINFOID:0000000006216326
Transmit the image displayed with AV control unit with RGB digital image signal to the front display unit.
Diagnosis ProcedureINFOID:0000000006216327
1.CHECK CONTINUITY RGB DIGI TAL IMAGE SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front display unit connector and AV control unit connector.
3. Check continuity between front display unit har ness connector and AV control unit harness connector.
4. Check continuity between front display unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK RGB DIGITAL IMAGE SIGNAL
1. Connect AV control unit connector.
2. Turn ignition switch ON.
3. Check signal between front display unit harness connector and ground.
Is the inspection result normal?
YES >> Replace front display unit. Refer to AV-213, "Removal and Installation".
NO >> Replace AV control unit. Refer to AV-212, "
Removal and Installation".
Front display unit AV control unit
Continuity
Connector Terminals Connector Terminals
M322 27
M321 157
Existed
28 158
Front display unit GroundContinuity
Connector Terminals
M322 27
Not existed
28
(+)
(− ) Condition Voltage
(Approx.)
Front display unit
Connector Terminal
M322 27
Ground — 1.3 V
28
Revision: 2010 May2011 QX56
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AV
COMPOSITE IMAGE SIGNAL CIRCUIT (AV CONTROL UNIT TO FRONT DIS-
PLAY UNIT)
AV-167
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COMPOSITE IMAGE SIGNAL CIRCUI T (AV CONTROL UNIT TO FRONT
DISPLAY UNIT)
DescriptionINFOID:0000000006216328
DVD is played by inserting DVD into the AV control unit.
DVD image signals are transmitted to the front display unit and video distributor.
AV control unit receives the image signal from the front auxiliary input jacks and then transmits it to the front
display unit.
AV control unit receives the image signal from the USB (video data) and then transmits it to the front display
unit and video distributor.
Video distributor receives the image signal from the AV control unit and then transmits it to the headrest dis-
play unit.
Diagnosis ProcedureINFOID:0000000006216329
1.CHECK CONTINUITY COMPOS ITE IMAGE SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect AV control unit connector and front display unit connector.
3. Check continuity between AV control unit harness connector and front display unit harness connector.
4. Check continuity between AV control unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK COMPOSITE IMAGE SIGNAL
1. Connect AV control unit connector and front display unit connector.
2. Turn ignition switch ON.
3. Check signal between AV control unit harness connector and ground.
Is the inspection result normal?
YES >> Replace front display unit. Refer to AV-213, "Removal and Installation".
NO >> Replace AV control unit. Refer to AV-212, "
Removal and Installation".
AV control unit Front display unit
Continuity
Connector Terminal Connector Terminal
M210 68 M215 18 Existed
AV control unit GroundContinuity
Connector Terminal
M210 68 Not existed
(+) (− ) Condition Reference value
AV control unit
Connector Terminal
M210 68 Ground At DVD image is displayed.
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AV-168
< DTC/CIRCUIT DIAGNOSIS >
COMPOSITE IMAGE SIGNAL CIRCUIT (AV CONTROL UNIT TO VIDEO DISTRIB-
UTOR)
COMPOSITE IMAGE SIGNAL CIRCUI T (AV CONTROL UNIT TO VIDEO
DISTRIBUTOR)
DescriptionINFOID:0000000006216330
DVD is played by inserting DVD into the AV control unit.
DVD image signals are transmitted to the front display unit and video distributor.
AV control unit receives the image signal from the front auxiliary input jacks and then transmits it to the front
display unit.
AV control unit receives the image signal from the USB (video data) and then transmits it to the front display
unit and video distributor.
Video distributor receives the image signal from the AV control unit and then transmits it to the headrest dis-
play unit.
Diagnosis ProcedureINFOID:0000000006216331
1.CHECK CONTINUITY COMPOS ITE IMAGE SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect AV control unit connector and video distributor connector.
3. Check continuity between AV control unit har ness connector and video distributor harness connector.
4. Check continuity between video distributor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK COMPOSITE IMAGE SIGNAL
1. Connect AV control unit connector and video distributor connector.
2. Turn ignition switch ON.
3. Check signal between video distributor harness connector and ground.
Is the inspection result normal?
YES >> Replace video distributor. Refer to AV-215, "Removal and Installation".
NO >> Replace AV control unit. Refer to AV-212, "
Removal and Installation".
AV control unit Video distributor
Continuity
Connector Terminal Connector Terminal
M209 34 M218 34 Existed
Video distributor GroundContinuity
Connector Terminal
M218 34 Not existed
(+) (− ) Condition Reference value
Video distributor
Connector Terminal
M218 34 Ground When DVD, USB or front AUX im-
age is displayed on headrest dis-
play unit LH or RH.
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AV
COMPOSITE IMAGE SIGNAL CIRCUIT (VIDEO DISTRIBUTOR TO HEADREST
DISPLAY UNIT)
AV-169
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COMPOSITE IMAGE SIGNAL CIRCUIT (VIDEO DISTRIBUTOR TO HEAD-
REST DISPLAY UNIT)
DescriptionINFOID:0000000006216332
DVD is played by inserting DVD into the AV control unit.
DVD image signals are transmitted to the front display unit and video distributor.
AV control unit receives the image signal from the front auxiliary input jacks and then transmits it to the front
display unit.
AV control unit receives the image signal from the USB (video data) and then transmits it to the front display
unit and video distributor.
Video distributor receives the image signal from the AV control unit and then transmits it to the headrest dis-
play unit.
Diagnosis ProcedureINFOID:0000000006216333
1.CHECK CONTINUITY COMPOS ITE IMAGE SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect video distributor connecto r and headrest display unit connector.
3. Check continuity between video distributor harne ss connector and headrest display unit harness connec-
tor.
*1: Headrest display unit LH
*2: Headrest display unit RH
4. Check continuity between headrest display unit harness connector and ground.
*1: Headrest display unit LH
*2: Headrest display unit RH
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK COMPOSITE IMAGE SIGNAL
1. Connect video distributor connector and rear display unit connector.
2. Turn ignition switch ON.
3. Check signal between rear display unit harness connector using an oscilloscope.
Video distributor Headrest display unit Continuity
Connector Terminal Connector Terminal
M217 32
B554
*124 Existed
28 B574
*224 Existed
Headrest display unit GroundContinuity
Connector Terminal
B554
*124 Not existed
B574
*224
(+)
(− ) Condition Reference value
Headrest display unit
Connector Terminal
Revision: 2010 May2011 QX56
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AV-170
< DTC/CIRCUIT DIAGNOSIS >
COMPOSITE IMAGE SIGNAL CIRCUIT (VIDEO DISTRIBUTOR TO HEADREST
DISPLAY UNIT)
*1: Headrest display unit LH
*2: Headrest display unit RH
Is the inspection result normal?
YES >> Replace headrest display unit. Refer to AV-214, "Exploded View".
NO >> Replace video distributor. Refer to AV-215, "
Removal and Installation".
B554*124
GroundWhen DVD, USB or front AUX im-
age is displayed on headrest dis-
play unit LH or RH.
B574
*224
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AV
AUX IMAGE SIGNAL CIRCUIT (FRONT AUXILIARY INPUT JACKS TO AV CON-
TROL UNIT)
AV-171
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AUX IMAGE SIGNAL CIRCUIT (FRONT AUXILIARY INPUT JACKS TO AV
CONTROL UNIT)
DescriptionINFOID:0000000006216334
Transmits the image signal of AUX device from fr ont auxiliary input jacks to AV control unit.
AV control unit transmits the image signal t hat is input to the front display unit.
Diagnosis ProcedureINFOID:0000000006216335
1.CHECK CONTINUITY AUX IMAGE SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front auxiliary input jacks connector and AV control unit connector.
3. Check continuity between front auxiliary input jacks harness connector and AV control unit harness con-
nector.
4. Check continuity between front auxiliary input jacks harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK AUX IMAGE SIGNAL
1. Connect front auxiliary input jacks connector and AV control unit connector.
2. Turn ignition switch ON.
3. Check signal between front auxiliar y input jacks harness connector and ground.
Is the inspection result normal?
YES >> Replace AV control unit. Refer to AV-212, "Removal and Installation".
NO >> Check that there is no malf unction in the external device.
Front auxiliary input jacks AV control unit
Continuity
Connector Terminal Connector Terminal
M139 7 M209 26 Existed
Front auxiliary input jacks GroundContinuity
Connector Terminal
M139 7 Not existed
(+) (− ) Condition Reference value
Front auxiliary input jacks
Connector Terminal
M139 7 Ground At front AUX image is dis-
played.
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AV-172
< DTC/CIRCUIT DIAGNOSIS >
AUX IMAGE SIGNAL CIRCUIT (REAR AUXILIARY INPUT JACKS TO VIDEO DIS-
TRIBUTOR)
AUX IMAGE SIGNAL CIRCUIT (REAR AUXILIARY INPUT JACKS TO VID-
EO DISTRIBUTOR)
DescriptionINFOID:0000000006216336
Transmits the image signal of AUX device from r ear auxiliary input jacks to the video distributor.
Video distributor transmits the image signal that is input to the headrest display unit.
Diagnosis ProcedureINFOID:0000000006216337
1.CHECK CONTINUITY AUX IMAGE SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear auxiliary input jacks connector and video distributor connector.
3. Check continuity between rear auxiliary input jacks harness connector and video distributor harness con-
nector.
4. Check continuity between rear auxili ary input jacks harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK AUX IMAGE SIGNAL
1. Connect rear auxiliary input jacks connector and video distributor connector.
2. Turn ignition switch ON.
3. Check signal between rear auxiliary input jacks harness connector and ground.
Is the inspection result normal?
YES >> Replace video distributor. Refer to AV-215, "Removal and Installation".
NO >> Check that there is no malfunction in the external device.
Rear auxiliary input jacks Video distributor Continuity
Connector Terminal Connector Terminal
M98 7 M218 40 Existed
Rear auxiliary input jacks GroundContinuity
Connector Terminal
M98 7 Not existed
(+) (− ) Condition Reference value
Rear auxiliary input jacks
Connector Terminal
M98 7 Ground At rear AUX image is dis-
played on headrest display
unit.
SKIB2251J
Revision: 2010 May2011 QX56