Infiniti G35 (V35) Sedan. Manual — part 148

AV-364

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U121D AV CONTROL UNIT

U121D AV CONTROL UNIT

Description

INFOID:0000000000964810

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

AV-530, "Exploded View"

.

DTC Logic

INFOID:0000000000964811

Part name

Description

AV CONTORL 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

U121E AV CONTROL UNIT

AV-365

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

C

D

E

F

G

H

I

J

K

L

M

B

N

A

O

P

U121E AV CONTROL UNIT

Description

INFOID:0000000000964812

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

AV-530, "Exploded View"

.

DTC Logic

INFOID:0000000000964813

Part name

Description

AV CONTORL 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-366

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U121F AV CONTROL UNIT

U121F AV CONTROL UNIT

Description

INFOID:0000000000964814

DTC Logic

INFOID:0000000000964815

Diagnosis Procedure

INFOID:0000000000964816

1.

CHECK AV CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT

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

AV-379, "AV CONTROL UNIT : Diagnosis

Procedure"

.

Is inspection result OK?

YES

>> INSPECTION END

NO

>> Repair malfunctioning parts.

Part name

Description

AV CONTORL 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

U1204 GPS

AV-367

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

C

D

E

F

G

H

I

J

K

L

M

B

N

A

O

P

U1204 GPS

Description

INFOID:0000000000964817

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 ff the malfunction occurs constantly. Refer to

AV-530,

"Exploded View"

.

DTC Logic

INFOID:0000000000964818

Diagnosis Procedure

INFOID:0000000000964819

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 CONTORL 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