2011 INFINITI QX56 Factory Service Manual

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Page 289 of 5598

INFINITI QX56 2011 Factory Service Manual
AV
U122E AV CONTROL UNITAV-141
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
K L
M B A
O P
U122E AV CONTROL UNIT
DTC LogicINFOID:0000000006216290
DTC DETECTION LOGIC
DTC Display contents of CON-
SULT-III

Page 290 of 5598

INFINITI QX56 2011 Factory Service Manual
AV-142
< DTC/CIRCUIT DIAGNOSIS >
U1232 STEERING ANGLE SENSOR
U1232 STEERING ANGLE SENSOR
DTC LogicINFOID:0000000006216291
Diagnosis ProcedureINFOID:0000000006216292
1.ADJUST THE PREDICTIVE COURSE LIN

Page 291 of 5598

INFINITI QX56 2011 Factory Service Manual
AV
U1243 FRONT DISPLAY UNITAV-143
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
K L
M B A
O P
U1243 FRONT DISPLAY UNIT
DTC LogicINFOID:0000000006216293
Diagnosis ProcedureINFOID:0000000006216294
1.CHECK F

Page 292 of 5598

INFINITI QX56 2011 Factory Service Manual
AV-144
< DTC/CIRCUIT DIAGNOSIS >
U1243 FRONT DISPLAY UNIT
Is inspection result normal?
YES >> GO TO 4.
NO >> Replace AV control unit. Refer to AV-212, "
Removal and Installation".
4.CHECK COMMUNICATI

Page 293 of 5598

INFINITI QX56 2011 Factory Service Manual
AV
U1244 GPS ANTENNAAV-145
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
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K L
M B A
O P
U1244 GPS ANTENNA
DTC LogicINFOID:0000000006216295
Diagnosis ProcedureINFOID:0000000006216296
1.GPS ANTENNA CHECK
Vis

Page 294 of 5598

INFINITI QX56 2011 Factory Service Manual
AV-146
< DTC/CIRCUIT DIAGNOSIS >
U1258 SATELLITE RADIO ANTENNA
U1258 SATELLITE RADIO ANTENNA
DTC LogicINFOID:0000000006226137
Diagnosis ProcedureINFOID:0000000006226138
1.SATELLITE RADIO ANTENNA CHEC

Page 295 of 5598

INFINITI QX56 2011 Factory Service Manual
AV
U125A HEADREST DISPLAY UNITAV-147
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
K L
M B A
O P
U125A HEADREST DISPLAY UNIT
DTC LogicINFOID:0000000006216297
Diagnosis ProcedureINFOID:0000000006216298
1.C

AV
U125A HEADREST DISPLAY UNITAV-147
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G H
I
J
K L
M B A
O P
U125A HEADREST DISPLAY UNIT
DTC LogicINFOID:0000000006216297
Diagnosis ProcedureINFOID:0000000006216298
1.CHECK HEADREST DISPLAY UNIT RH POWER SUPPLY AND GROUND CIRCUIT
Check headrest display unit RH power supply and ground circuits. Refer to AV-162, "
HEADREST DISPLAY
UNIT : Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair malfunctioning parts.
2.CHECK CONTINUITY AV COMMUNICATION CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect headrest display unit LH connector and headrest display unit RH connector.
3. Check continuity between headrest display unit LH harness connector and headrest display unit RH har- ness connector.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK LOCATION RECOGNITION SIGNAL CIRCUIT
Check location recognition signal circuit between headrest display unit RH and ground. Refer to AV-175,
"Diagnosis Procedure".
Is the inspection result normal?
YES >> Replace headrest display unit RH. Refer to AV-214, "Exploded View".
NO >> Repair harness or connector.
DTC Display contents of
CONSULT-III DTC Detection Condit
ion Possible causes
U125A 3RD DISP CONN
[U125A] When either one of the following items are detected:
headrest display unit RH power supply and ground cir-
cuits are malfunctioning.
AV communication circuits between headrest display unit LH and headrest display unit RH are malfunction-
ing.
location recognition signal circuit between headrest dis- play unit RH and ground is malfunctioning. Headrest display unit RH power
supply and ground circuits.
AV communication circuits be- tween Headrest display unit LH and
headrest display unit RH.
Location recognition signal circuit between headrest display unit RH
and ground.
Headrest display unit LH Headrest display unit RH Continuity
Connector Terminals Connector Terminals
B554 11
B574 12
Existed
13 14
Revision: 2010 May2011 QX56

Page 296 of 5598

INFINITI QX56 2011 Factory Service Manual
AV-148
< DTC/CIRCUIT DIAGNOSIS >
U1263 USB
U1263 USB
DTC LogicINFOID:0000000006216299
Diagnosis ProcedureINFOID:0000000006216300
1.CHECK USB HARNESS
Visually check USB harness.
Is the inspection resu

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