Nissan Teana J32. Manual - part 55

AV

U1200 AV CONTROL UNIT

AV-75

< COMPONENT DIAGNOSIS >

[BASE AUDIO AND DISPLAY SYSTEM]

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U1200 AV CONTROL UNIT

Description

INFOID:0000000003882721

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

AV-170, "Removal and Installation"

.

DTC Logic

INFOID:0000000003882722

DTC DETECTION LOGIC

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 combination meter via CAN communication to ob-

tain necessary information for the vehicle information function.

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

vehicle settings function.

• AUX image signal is input from auxiliary jacks.
• Camera image signal is input from camera control unit.
• Composite image (AUX and camera images) signal is output to display unit.
• AUX sound signal is input from the auxiliary jacks.
• Power (signal VCC and inverter VCC) is transmitted to front display unit.

DTC

Display contents of 

CONSULT-III

DTC Detection Condition

Action to take

U1200

Cont Unit
FLASH- ROM
[U1200]

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

Replace AV control unit.

AV-76

< COMPONENT DIAGNOSIS >

[BASE AUDIO AND DISPLAY SYSTEM]

U1216 AV CONTROL UNIT

U1216 AV CONTROL UNIT

Description

INFOID:0000000003882723

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

AV-170, "Removal and Installation"

.

DTC Logic

INFOID:0000000003882724

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 combination meter via CAN communication to ob-

tain necessary information for the vehicle information function.

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

vehicle settings function.

• AUX image signal is input from auxiliary jacks.
• Camera image signal is input from camera control unit.
• Composite image (AUX and camera images) signal is output to display unit.
• AUX sound signal is input from the auxiliary jacks.
• Power (signal VCC and inverter VCC) is transmitted to front display unit.

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

U1243 DISPLAY UNIT

AV-77

< COMPONENT DIAGNOSIS >

[BASE AUDIO AND DISPLAY SYSTEM]

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U1243 DISPLAY UNIT

Description

INFOID:0000000003882725

DTC Logic

INFOID:0000000003882726

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000003901200

1.

CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT

Check display unit power supply and ground circuit. Refer to 

AV-82, "DISPLAY UNIT : Diagnosis Procedure"

.

Is 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 inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

Part name

Description

DISPLAY UNIT

• Display image is controlled by the serial communication from AV control unit.
• It receives the power (signal VCC and inverter VCC) from the AV control unit 

and operates.

• RGB image signal is input from AV control unit (RGB, RGB area and RGB syn-

chronizing). 

• Composite image (DVD, AUX and camera images) signal is input from AV con-

trol unit. 

• Synchronize signal (HP, VP) is output to 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 are mal-

functioning.

• serial communication circuits between display unit and 

AV control unit are malfunctioning.

• serial communication signal between display unit and 

AV control unit is malfunctioning.

• Display unit power supply and 

ground circuits.

• Serial communication circuits be-

tween display unit and AV control 
unit

Display unit

AV control unit

Continuity

Connector

Terminals

Connector

Terminals

M49

11

M129

56

Existed

22

44

Display unit

Ground

Continuity

Connector

Terminals

M49

11

Not existed

22

AV-78

< COMPONENT DIAGNOSIS >

[BASE AUDIO AND DISPLAY SYSTEM]

U1243 DISPLAY UNIT

3.

CHECK COMMUNICATION SIGNAL

1.

Connect display unit connector and AV control unit connector.

2.

Turn ignition switch ON.

3.

Check signal between display unit harness connector terminal and ground using an oscilloscope.

Is inspection result normal?

YES

>> GO TO 4.

NO

>> Replace AV control unit.

4.

CHECK COMMUNICATION SIGNAL

Check signal between display unit harness connector terminal and ground using an oscilloscope.

Is inspection result normal?

YES

>> INSPECTION END

NO

>> Replace display unit.

(+)

(

−

)

Condition

Reference value

Display unit

Connector

Terminal

M49

11

Ground

When adjusting display bright-
ness.

PKIB5039J

(+)

(

−

)

Condition

Reference value

Display unit

Connector

Terminal

M49

22

Ground

When adjusting display bright-
ness.

PKIB5039J