Infiniti QX56 (Z62). Manual - part 74

AV-150

< DTC/CIRCUIT DIAGNOSIS >

U1265 BOSE AMP.

U1265 BOSE AMP.

DTC Logic

INFOID:0000000006216303

Diagnosis Procedure

INFOID:0000000006216304

1.

CHECK CONTINUITY BETWEEN AV CONTROL UNIT AND BOSE AMP.

1.

Turn ignition switch OFF.

2.

Disconnect BOSE amp. connector and AV control unit connector.

3.

Check continuity between AV control unit harness connector and BOSE amp. 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 VOLTAGE AV CONTROL UNIT

1.

Connect AV control unit connector.

2.

Turn ignition switch ON.

3.

Check voltage between AV control unit harness connector and ground.

Is the inspection result normal?

YES

>> Replace BOSE amp. Refer to 

AV-223, "Removal and Installation"

.

NO

>> Replace AV control unit. Refer to 

AV-212, "Removal and Installation"

.

DTC

Display contents of 

CONSULT-III

DTC detection condition

Possible malfunction factor

U1265

AMP ON TERMINAL 
[U1265]

BOSE amp. ON signal circuit is open or shorted.

Check BOSE amp. ON signal circuit 
between the AV control unit and 
BOSE amp.

AV control unit

BOSE amp.

Continuity

Connector

Terminals

Connector

Terminals

M208

1

B230

20

Existed

AV control unit

Ground

Continuity

Connector

Terminals

M208

1

Not existed

(+)

(–)

Voltage

(Approx.)

AV control unit

Connector

Terminals

M208

1

Ground

12.0 V

AV

U1300 AV COMM CIRCUIT

AV-151

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

U1300 AV COMM CIRCUIT

Description

INFOID:0000000006216305

U1300 is indicated when malfunction occurs in communication signal of multi AV system. Indicated simulta-
neously, without fail, with the malfunction of control units connected to AV control unit with communication line.
Determine the possible malfunction cause from the table below.

SELF-DIAGNOSIS RESULTS DISPLAY ITEM

DTC

Display contents of 

CONSULT-III

DTC detection condition

Possible malfunction factor

U1300
U1240

• AV COMM CIRCUIT 

[U1300]

• SWITCH CONN 

[U1240]

When either one of the following items are detected:
• multifunction switch power supply and ground circuits 

are malfunctioning.

• AV communication circuits between AV control unit 

and multifunction switch are malfunctioning.

• Multifunction switch power supply 

and ground circuits.

• AV communication circuits between 

AV control unit and multifunction 
switch.

U1300
U1246

• AV COMM CIRCUIT 

[U1300]

• VIDEO DIST CONN 

[U1246]

When either one of the following items are detected:
• video distributor power supply and ground circuits are 

malfunctioning.

• headrest display unit LH power supply and ground cir-

cuits are malfunctioning.

• AV communication circuits between AV control unit 

and headrest display unit LH are malfunctioning.

• location recognition signal circuit between headrest 

display unit LH and ground is malfunctioning.

• Video distributor power supply and 

ground circuits.

• Headrest display unit LH power sup-

ply and ground circuits.

• AV communication circuits between 

AV control unit and headrest display 
unit LH.

• Location recognition signal circuit 

between headrest display unit LH 
and ground.

U1300

U125B

• AV COMM CIRCUIT 

[U1300]

• AROUND CAMERA 

CONN [U125B]

When either one of the following items are detected:
• around view monitor control unit power supply and 

ground circuits are malfunctioning.

• AV communication circuits between AV control unit 

and around view monitor control unit are malfunction-
ing.

• Around view monitor control unit 

power supply and ground circuits.

• AV communication circuits between 

AV control unit and around view 
monitor control unit.

U1300

U125C

• AV COMM CIRCUIT 

[U1300]

• SONAR CONN 

[U125C]

When either one of the following items are detected:
• sonar control unit power supply and ground circuits are 

malfunctioning.

• AV communication circuits between AV control unit 

and sonar control unit are malfunctioning.

• Sonar control unit power supply and 

ground circuits.

• AV communication circuits between 

AV control unit and sonar control 
unit.

U1300
U1240

U125C
U125B

• AV COMM CIRCUIT 

[U1300]

• SWITCH CONN 

[U1240]

• SONAR CONN 

[U125C]

• AROUND CAMERA 

CONN [U125B]

AV communication circuits between AV control unit and 
multifunction switch are malfunctioning.

AV communication circuits between AV 
control unit and multifunction switch.

U1300
U1240

U125C
U125B

U1246

• AV COMM CIRCUIT 

[U1300]

• SWITCH CONN 

[U1240]

• SONAR CONN 

[U125C]

• AROUND CAMERA 

CONN [U125B]

• VIDEO DIST CONN 

[U1246]

AV-152

< DTC/CIRCUIT DIAGNOSIS >

U1310 AV CONTROL UNIT

U1310 AV CONTROL UNIT

DTC Logic

INFOID:0000000006216306

DTC

Display contents of 

CONSULT-III

DTC detection condition

Possible malfunction factor

U1310

CONTROL UNIT (AV)
[U1310]

An initial diagnosis error is detected in AV communication 
circuit.

Replace the AV control unit if the mal-
function occurs constantly.
Refer to 

AV-212, "Removal and In-

stallation"

.

AV

B2700 CORNER SENSOR [FL]

AV-153

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

B2700 CORNER SENSOR [FL]

DTC Logic

INFOID:0000000006216307

DTC DETECTION LOGIC

DTC No.

CONSULT-III indication

DTC detection condition

Troubleshooting

B2700

CORNER SENSOR [FL]
[B2700]

Corner sensor front LH is malfunctioning.

Replace corner sensor front LH.