Infiniti EX35. Manual - part 185

 

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Infiniti EX35. Manual - part 185

 

 

AV

U121D AV CONTROL UNIT

AV-521

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

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U121D AV CONTROL UNIT

Description

INFOID:0000000003513827

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

AV-903, "Removal and Installation"

.

DTC Logic

INFOID:0000000003160661

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 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

U121D

DSP CONN
[U121D]

Internal malfunction of AV control unit (DSP connection 
error) is detected.

Replace AV control unit

AV-522

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U121E AV CONTROL UNIT

U121E AV CONTROL UNIT

Description

INFOID:0000000003513828

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

AV-903, "Removal and Installation"

.

DTC Logic

INFOID:0000000003160663

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 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

U121E

DSP COMM
[U121E]

Internal malfunction of AV control unit (DSP communica-
tion error) is detected.

Replace AV control unit

AV

U121F AV CONTROL UNIT

AV-523

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

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D

E

F

G

H

I

J

K

L

M

B

A

O

P

U121F AV CONTROL UNIT

Description

INFOID:0000000003513829

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

AV-903, "Removal and Installation"

.

DTC Logic

INFOID:0000000003160665

Diagnosis Procedure

INFOID:0000000003160666

1.

CHECK AV CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT

Check AV control unit power supply and ground circuit. Refer to 

AV-544, "AV CONTROL UNIT : Diagnosis

Procedure"

.

Is inspection result normal?

YES

>> INSPECTION END

NO

>> Repair malfunctioning parts.

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 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

U121F

INTERNAL COMM
[U121F]

Internal malfunction of AV control unit (internal communi-
cation error) is detected.

AV control unit power supply and 
ground circuit

AV-524

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U1204 GPS

U1204 GPS

Description

INFOID:0000000003160667

An intermittent error caused by strong radio interference may be detected unless any symptoms (GPS recep-
tion error, etc.) occur. Replace the AV control unit if the malfunction occurs constantly. Refer to 

AV-903,

"Removal and Installation"

.

DTC Logic

INFOID:0000000003160668

Diagnosis Procedure

INFOID:0000000003160669

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 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 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

U1204

GPS CONN
[U1204]

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

Replace AV control unit

 

 

 

 

 

 

 

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