Infiniti G35 (V35) Sedan. Manual — part 65

AV-32

< COMPONENT DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

U1310 AV CONTROL UNIT

U1310 AV CONTROL UNIT

Description

INFOID:0000000000964536

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

AV-111, "Exploded View"

.

DTC Logic

INFOID:0000000000964537

Part name

Description

AV CONTORL UNIT

• 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.

• 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 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

AV

U1200 AV CONTROL UNIT

AV-33

< COMPONENT DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

C

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U1200 AV CONTROL UNIT

Description

INFOID:0000000000964538

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

AV-111, "Exploded View"

.

DTC Logic

INFOID:0000000000964539

Part name

Description

AV CONTORL UNIT

• 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.

• 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 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

U1200

Cont Unit
FLASH- ROM
[U1200]

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

Replace AV control unit

AV-34

< COMPONENT DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

U1216 AV CONTROL UNIT

U1216 AV CONTROL UNIT

Description

INFOID:0000000000964540

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

AV-111, "Exploded View"

.

DTC Logic

INFOID:0000000000964541

Part name

Description

AV CONTORL UNIT

• 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.

• 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 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

U1216

CAN CONT
[U1216]

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

Replace AV control unit

AV

U1243 DISPLAY UNIT

AV-35

< COMPONENT DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

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U1243 DISPLAY UNIT

Description

INFOID:0000000000964542

DTC Logic

INFOID:0000000000964543

Diagnosis Procedure

INFOID:0000000000964544

1.

CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT

Check display unit power supply and ground circuit. Refer to

AV-39, "DISPLAY UNIT : Diagnosis Procedure"

.

Is inspection result OK?

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 terminals 11, 22 and AV control unit harness
connector terminals 56, 44.

4.

Check continuity between display unit harness connector terminals 11, 22 and ground.

Is inspection result OK?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

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 11 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]

• Display unit power supply and ground circuit malfunc-

tion is detected

• Malfunction is detected on communication circuit be-

tween display unit and AV control unit

• Malfunction is detected on communication signal be-

tween display unit and AV control unit

• Display unit power supply and

ground circuit

• Communication circuit between

display unit and AV control unit

11 - 56

: Continuity should exist.

22 - 44

: Continuity should exist.

11, 22 - Ground

: Continuity should not exist.