Infiniti QX56 (JA60). Manual - part 64

AV-64

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

U1250 CAMERA CONTROL UNIT

1. Connect AV control unit connector.

2. Turn ignition switch ON.

3. Check voltage between AV control unit harness connector M45

terminal 84 and ground.

Is voltage approximately 5 volts?

YES

>> Replace camera control unit. Refer to 

AV-189, "Removal

and Installation"

.

NO

>> Replace AV control unit. Refer to 

AV-169, "Removal and Installation"

.

Connector

Terminals

Voltage

(+)

(-)

M45

84

Ground

Approx. 5V

ALNIA0402GB

AV

U1258 SATELLITE RADIO ANTENNA

AV-65

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

C

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F

G

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P

U1258 SATELLITE RADIO ANTENNA

Description

INFOID:0000000005146295

DTC Logic

INFOID:0000000005146296

Diagnosis Procedure

INFOID:0000000005146297

Regarding Wiring Diagram information, refer to 

AV-116, "Wiring Diagram"

.

1.

SATELLITE RADIO ANTENNA CHECK

Visually check satellite radio antenna and antenna feeder.
Is inspection result OK?

YES

>> GO TO 2.

NO

>> Repair malfunctioning parts.

2.

CHECK AV CONTROL UNIT VOLTAGE 

1. Disconnect AV control unit connector M125.

2. Turn ignition switch ON.

3. Check voltage between AV control unit connector M125  termi-

nal 118 and ground.

Is voltage approximately 5 volts?

YES

>> Inspection end. 

NO

>> Replace AV control unit. Refer to 

AV-169, "Removal and

Installation"

.

Part name

Description

SATELLITE RADIO ANTENNA

Satellite radio signal is received and sent to audio control unit.

DTC

Display contents of 

CONSULT-III

DTC Detection Condition

Possible causes

U1258

XM ANETNNA CONN
[U1258]

Satellite radio antenna connection malfunction is detect-
ed.

Satellite radio antenna disconnection.

118 - Ground

: Approx. 5 V

ALNIA0403GB

AV-66

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

U1300 AV COMM CIRCUIT

U1300 AV COMM CIRCUIT

Description

INFOID:0000000005146298

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 causes

U1300

• AV COMM CIRCUIT

[U1300]

When AV control unit is not transmitting or receiving AV 
communication signal for 2 seconds or more.

AV communication system.

AV

U1310 AV CONTROL UNIT

AV-67

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

C

D

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U1310 AV CONTROL UNIT

Description

INFOID:0000000005146299

Replace the AV control unit if this DTC is displayed. Refer to 

AV-169, "Removal and Installation"

.

DTC Logic

INFOID:0000000005146300

Part name

Description

AV CONTROL UNIT

• Integrates HDD (hard disk drive) allowing map data and music data to be 

stored.

• It is the master unit of the MULTI AV system, and it is connected to each control 

unit by means of communication. It operates each system according to com-
munication signals from the AV control unit.

• The AV control unit includes the audio, hands-free phone, voice control, navi-

gation, and vehicle information functions.

• It is connected to ECM and combination meter via CAN communication to ob-

tain necessary information for the vehicle information function.

• It inputs the automatic brightness ON/OFF signals that are required for the dis-

play dimming control.

• It inputs the signals for driving status recognition (vehicle speed, reverse and 

parking brake). 

DTC

Display contents of 

CONSULT-III

DTC Detection Condition

Action to take

U1310

CONTROL UNIT (AV)
[U1310]

An initial diagnosis error is detected in AV communication 
circuit.

Replace AV control unit. Refer to 

AV-

169, "Removal and Installation"

.