2011 INFINITI QX56 air condition

AV-154
< DTC/CIRCUIT DIAGNOSIS >
B2701 SENSOR HARNESS OPEN [CR-FL]
B2701 SENSOR HARNESS OPEN [CR-FL]
DTC LogicINFOID:0000000006216308
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000006216309
1.CHECK HARNESS CORNER SENSOR FRONT LH SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect sonar control unit connector and corner sensor front LH connector.
3. Check continuity between sonar control unit harnes s connector and corner sensor front LH 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 FRONT LH GROUND CIRCUIT
Check continuity between sonar control unit harness c onnector and corner sensor front LH harness connector.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair harness or connector.
DTC No. CONSULT-III indication DTC detection condition Troubleshooting B2701 SENSOR HARNESS
OPEN [CR-FL] [B2701]
Corner sensor front LH harness circuit is open. Check corner sensor front LH circuit.
Sonar control unit Corner sensor front LH
Continuity
Connector Terminal Connector Terminal
M47 3 E221 1 Existed
Sonar control unit GroundContinuity
Connector Terminal
M47 3 Not existed
Sonar control unit Corner sensor front LH Continuity
Connector Terminal Connector Terminal
M47 12 E221 2 Existed
Revision: 2010 May2011 QX56

AV-156
< DTC/CIRCUIT DIAGNOSIS >
B2703 SENSOR HARNESS OPEN [CR-FR]
B2703 SENSOR HARNESS OPEN [CR-FR]
DTC LogicINFOID:0000000006216311
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000006216312
1.CHECK HARNESS CORNER SENSOR FRONT RH SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect sonar control unit connector and corner sensor front RH connector.
3. Check continuity between sonar control unit harne ss connector and corner sensor front 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 FRONT RH GROUND CIRCUIT
Check continuity between sonar control unit harness connector and corner sensor front RH harness connec-
tor.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair harness or connector.
DTC No. CONSULT-III indication DTC detection condition Troubleshooting
B2703 SENSOR HARNESS
OPEN [CR-FR] [B2703]
Corner sensor front RH harness circuit is open. Check corner sensor front RH circuit.
Sonar control unit Corner sensor front RH
Continuity
Connector Terminal Connector Terminal
M47 4 E222 1 Existed
Sonar control unit GroundContinuity
Connector Terminal
M47 4 Not existed
Sonar control unit Corner sensor front RH Continuity
Connector Terminal Connector Terminal
M47 12 E222 2 Existed
Revision: 2010 May2011 QX56

AV-158
< DTC/CIRCUIT DIAGNOSIS >
B2705 SENSOR HARNESS OPEN [CR-RL]
B2705 SENSOR HARNESS OPEN [CR-RL]
DTC LogicINFOID:0000000006216314
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000006216315
1.CHECK HARNESS CORNER SENSOR REAR LH SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect sonar control unit connector and corner sensor rear LH connector.
3. Check continuity between sonar control unit harne ss connector and corner sensor rear LH 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 LH GROUND CIRCUIT
Check continuity between sonar control unit harness c onnector and corner sensor rear LH harness connector.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair harness or connector.
DTC No. CONSULT-III indication DTC detection condition Troubleshooting B2705 SENSOR HARNESS
OPEN [CR-RL] [B2705]
Corner sensor rear LH harness circuit is open. Check corner sensor rear LH circuit.
Sonar control unit Corner sensor rear LH
Continuity
Connector Terminal Connector Terminal
M47 5 B252 1 Existed
Sonar control unit GroundContinuity
Connector Terminal
M47 5 Not existed
Sonar control unit Corner sensor rear LH Continuity
Connector Terminal Connector Terminal
M47 12 B252 2 Existed
Revision: 2010 May2011 QX56

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-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 >
C
DE
F
G H
I
J
K L
M B A
O P
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
DE
F
G H
I
J
K L
M B A
O P
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