Infiniti G37 Coupe. Manual - part 168

AV

U1206 GPS

AV-425

< COMPONENT DIAGNOSIS >

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U1206 GPS

Description

INFOID:0000000001682753

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

AV-608, "Exploded View"

.

DTC Logic

INFOID:0000000001558830

Diagnosis Procedure

INFOID:0000000001558831

1.

PERFORM THE SELF-DIAGNOSIS

1.

Delete the self-diagnosis results. Turn ignition switch OFF.

2.

Turn ignition switch ON. Perform the self-diagnosis again. 

3.

Check that the DTC is detected again.

Is any DTC detected?

YES

>> Replace AV control unit.

NO

>> The intermittent malfunction caused by strong radio interference can be detected.

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

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

gation, satellite radio and vehicle information functions.

• 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). 

DTC

Display contents of 

CONSULT-III

DTC Detection Condition

Action to take

U1206

GPS RAM
[U1206]

Internal malfunction of AV control unit (GPS malfunction) 
is detected.

Replace AV control unit.

AV-426

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U1207 GPS

U1207 GPS

Description

INFOID:0000000001682754

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

AV-608, "Exploded View"

.

DTC Logic

INFOID:0000000001558833

Diagnosis Procedure

INFOID:0000000001558834

1.

PERFORM THE SELF-DIAGNOSIS

1.

Delete the self-diagnosis results. Turn ignition switch OFF.

2.

Turn ignition switch ON. Perform the self-diagnosis again. 

3.

Check that the DTC is detected again.

Is any DTC detected?

YES

>> Replace AV control unit.

NO

>> The intermittent malfunction caused by strong radio interference can be detected.

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

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

gation, satellite radio and vehicle information functions.

• 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). 

DTC

Display contents of 

CONSULT-III

DTC Detection Condition

Action to take

U1207

GPS RTC
[U1207]

Internal malfunction of AV control unit (GPS malfunction) 
is detected.

Replace AV control unit.

AV

U1243 DISPLAY UNIT

AV-427

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U1243 DISPLAY UNIT

Description

INFOID:0000000001558835

DTC Logic

INFOID:0000000001558836

Diagnosis Procedure

INFOID:0000000001558837

1.

CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT

Check display unit power supply and ground circuit. Refer to 

AV-433, "DISPLAY UNIT : Diagnosis Procedure"

.

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 terminals 11, 22 and AV control unit harness
connector terminals 70, 71.

4.

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

Is the inspection result normal?

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

chronizing). Auxiliary image signal is input from the auxiliary input jack. Cam-
era image signal is input from the camera control unit.

• Synchronize signal (HP, VP) is output to AV control unit.
• Touch panel function can be operated for each system by touching a display 

directly.

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 in communication circuit be-

tween AV control unit and display unit

• Malfunction is detected in communication signal be-

tween AV control unit and display unit

• Display unit power supply and 

ground circuit.

• Communication circuit between AV 

control unit and display unit.

11 - 70

: Continuity should exist.

22 - 71

: Continuity should exist.

11, 22 - Ground

: Continuity should not exist.

AV-428

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U1243 DISPLAY UNIT

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace AV control unit.

4.

CHECK COMMUNICATION SIGNAL

Check signal between display unit harness connector terminal 22 and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace display unit.

Terminal

Condition

Reference value

11 - Ground

Ignition 

switch 

ON

When adjusting display bright-
ness.

PKIB5039J

Terminal

Condition

Reference value

22 - Ground

Ignition 

switch 

ON

When adjusting display bright-
ness.

PKIB5039J