Infiniti EX35. Manual - part 107

AV

U1310 AV CONTROL UNIT

AV-209

< COMPONENT DIAGNOSIS >

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U1310 AV CONTROL UNIT

Description

INFOID:0000000003544747

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

AV-156, "Exploded View"

.

DTC Logic

INFOID:0000000003544748

Part name

Description

AV CONTROL UNIT

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

unit by communication. It operates each system according to communication 
signals from the AV control unit.

• AV control unit includes audio function and vehicle information function.
• It is connected to ECM and unified meter and A/C amp via CAN communica-

tion to obtain necessary information for the vehicle information function.

• It is connected to BCM via CAN communication transmitting/receiving for the 

vehicle settings function.

• It inputs the illumination signals that are required for the display dimming con-

trol.

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

parking brake). 

• Auxiliary image signal is input from the auxiliary input jacks.

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.

AV-210

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U1200 AV CONTROL UNIT

U1200 AV CONTROL UNIT

Description

INFOID:0000000003544749

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

AV-412, "Exploded View"

.

DTC Logic

INFOID:0000000003544750

Part name

Description

AV CONTROL UNIT

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

unit by communication. It operates each system according to communication 
signals from the AV control unit.

• AV control unit includes audio function and vehicle information function.
• It is connected to ECM and unified meter and A/C amp via CAN communica-

tion to obtain necessary information for the vehicle information function.

• It is connected to BCM via CAN communication transmitting/receiving for the 

vehicle settings function.

• It inputs the illumination signals that are required for the display dimming con-

trol.

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

parking brake). 

• Auxiliary image signal is input from the auxiliary input jacks.

DTC

Display contents of 

CONSULT-III

DTC Detection Condition

Action to take

U1200

Cont Unit
FLASH- ROM
[U1200]

An internal malfunction is detected in AV control unit 
(FLASH-ROM).

Replace AV control unit.

AV

U1216 AV CONTROL UNIT

AV-211

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U1216 AV CONTROL UNIT

Description

INFOID:0000000003544751

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

AV-412, "Exploded View"

.

DTC Logic

INFOID:0000000003544752

Part name

Description

AV CONTROL UNIT

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

unit by communication. It operates each system according to communication 
signals from the AV control unit.

• AV control unit includes audio function and vehicle information function.
• It is connected to ECM and unified meter and A/C amp via CAN communica-

tion to obtain necessary information for the vehicle information function.

• It is connected to BCM via CAN communication transmitting/receiving for the 

vehicle settings function.

• It inputs the illumination signals that are required for the display dimming con-

trol.

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

parking brake). 

• Auxiliary image signal is input from the auxiliary input jacks.

DTC

Display contents of 

CONSULT-III

DTC Detection Condition

Action to take

U1216

CAN CONT
[U1216]

Internal malfunction of AV control unit (CAN controller) is 
detected.

Replace AV control unit.

AV-212

< COMPONENT DIAGNOSIS >

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U1243 DISPLAY UNIT

U1243 DISPLAY UNIT

Description

INFOID:0000000003544753

DTC Logic

INFOID:0000000003544754

Diagnosis Procedure

INFOID:0000000003544755

1.

CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT

Check display unit power supply and ground circuits. Refer to 

AV-218, "DISPLAY UNIT : Diagnosis Proce-

dure"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair malfunctioning parts.

2.

CHECK CONTINUITY COMMUNICATION CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect display unit connector and AV control unit connector.

3.

Check continuity between display unit harness connector and AV control unit harness connector.

4.

Check continuity between display unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK COMMUNICATION SIGNAL (CONT

→

DISP)

1.

Connect display unit connector and AV control unit connector.

2.

Turn ignition switch ON.

3.

Check signal between display unit harness connector and ground.

Part name

Description

DISPLAY UNIT

• Display image is controlled by the serial communication from AV control unit.
• Inputs the RGB image signal (RGB, RGB area and RGB synchronizing) from 

AV control unit and the auxiliary image signal from the auxiliary input jacks.

• Outputs the synchronizing signals (HP and VP) to the AV control unit.

DTC

Display contents of 

CONSULT-III

DTC Detection Condition

Possible causes

U1243

FRONT DISP CONN
[U1243]

When either one of the following items is detected:

• Display unit power supply and ground circuits malfunc-

tion is detected.

• Malfunction is detected in communication circuits be-

tween AV control unit and display unit.

• Display unit power supply and 

ground circuits.

• Communication circuits between 

AV control unit and display unit.

Display unit

AV control unit

Continuity

Connector

Terminals

Connector

Terminals

M71

11

M83

56

Existed

22

44

Display unit

Ground

Continuity

Connector

Terminals

M71

11

Not existed

22