ground INFINITI QX56 2011 Factory Service Manual

AV-160
< DTC/CIRCUIT DIAGNOSIS >
B2707 SENSOR HARNESS OPEN [CR-RR]
B2707 SENSOR HARNESS OPEN [CR-RR]
DTC LogicINFOID:0000000006216317
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000006216318
1.CHECK HARNESS CORNER SENSOR REAR RH SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect sonar control unit connector and corner sensor rear RH connector.
3. Check continuity between sonar control unit harne ss connector and corner sensor rear RH harness con-
nector.
4. Check continuity between sonar control unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK HARNESS CORNER SENSOR REAR RH GROUND CIRCUIT
Check continuity between sonar control unit harness connector and corner sensor rear RH harness connector.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair harness or connector.
DTC No. CONSULT-III indication DTC detection condition Troubleshooting B2707 SENSOR HARNESS
OPEN [CR-RR] [B2707]
Corner sensor rear RH harness circuit is open. Check corner sensor rear RH circuit.
Sonar control unit Corner sensor rear RH
Continuity
Connector Terminal Connector Terminal
M47 6 B253 1 Existed
Sonar control unit GroundContinuity
Connector Terminal
M47 6 Not existed
Sonar control unit Corner sensor rear RH Continuity
Connector Terminal Connector Terminal
M47 12 B253 2 Existed
Revision: 2010 May2011 QX56

AV
POWER SUPPLY AND GROUND CIRCUITAV-161
< DTC/CIRCUIT DIAGNOSIS >
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POWER SUPPLY AND GROUND CIRCUIT
AV CONTROL UNIT
AV CONTROL UNIT : Diagnosis ProcedureINFOID:0000000006216319
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 AV control unit harness connectors and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check harness between AV control unit and fuse.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect AV control unit connectors.
3. Check continuity between AV control unit harness connectors and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair harness or connector.
FRONT DISPLAY UNIT
FRONT DISPLAY UNIT : Diagnosis ProcedureINFOID:0000000006216320
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 front display unit harness connector and ground.
Power source Fuse No.
Battery 35
Ignition switch ACC or ON 19
Signal name Connector Terminal Ignition switch position Value (Approx.)
Battery power supply M208 19 OFF Battery voltage ACC power supply M208 7 ACC Battery voltage
Signal name Connector Terminal Ignition switch position Continuity Ground M208 20 OFF Existed
Power source Fuse No. Battery 35
Ignition switch ACC or ON 19
Revision: 2010 May2011 QX56

AV-162
< DTC/CIRCUIT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check harness between front display unit and fuse.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front display unit connector.
3. Check continuity between front display unit harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair harness or connector.
HEADREST DISPLAY UNIT
HEADREST DISPLAY UNIT : Diagnosis ProcedureINFOID:0000000006216321
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 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 3.
NO >> Check harness between headrest display unit and fuse.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect headrest display unit connector.
3. Check continuity between headrest display unit harness connector and ground.
 *1: Headrest display unit LH
 *2: Headrest display unit RH
Signal name Connector Terminal Ignition switch position Value (Approx.)
Battery power su pply M215 11 OFF Battery voltage
ACC power supply M215 23 ACC Battery voltage
Signal name Connector Terminal Ignition switch position Continuity Ground M215 12 OFF Existed
Power source Fuse No. Battery 35
Signal name Connector Terminal Ignition switch position Value (Approx.)
Battery power supply B554
*1
B574*2
2
OFF Battery voltage
4
Signal name Connector Terminal Ignition switch position Continuity
Ground B554
*1
B574*2
1
OFF Existed
3
Revision: 2010 May2011 QX56

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
Revision: 2010 May2011 QX56

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

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

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

AV
COMPOSITE IMAGE SIGNAL CIRCUIT (AV CONTROL UNIT TO FRONT DIS-
PLAY UNIT)
AV-167
< DTC/CIRCUIT DIAGNOSIS >
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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.
SKIB2251J
Revision: 2010 May2011 QX56

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.
SKIB2251J
Revision: 2010 May2011 QX56

AV
COMPOSITE IMAGE SIGNAL CIRCUIT (VIDEO DISTRIBUTOR TO HEADREST
DISPLAY UNIT)
AV-169
< DTC/CIRCUIT DIAGNOSIS >
C
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G H
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M B A
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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