Infiniti FX35, FX50 (S51). Manual - part 78

AV

U1216 AV CONTROL UNIT

AV-85

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT NAVIGATION]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

U1216 AV CONTROL UNIT

DTC Logic

INFOID:0000000005528917

DTC

Display contents of 

CONSULT-III

DTC detection condition

Possible malfunction factor

U1216

CAN CONT
[U1216]

AV control unit malfunction is detected.

Replace the AV control unit if the mal-
function occurs constantly.

AV-86

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT NAVIGATION]

U121D AV CONTROL UNIT

U121D AV CONTROL UNIT

DTC Logic

INFOID:0000000005528967

Diagnosis Procedure

INFOID:0000000005528968

1.

CHECK PLAYBACK OF A DISK (CD)

Can a disk (CD) be played?

YES

>> Malfunction may be detected transitory.

NO

>> Replace AV control unit. Refer to 

AV-136, "Exploded View"

.

DTC

Display contents of 

CONSULT-III

DTC detection condition

Possible malfunction factor

U121D

DSP CONN
[U121D]

AV control unit malfunction is detected.

• If a disc can be played, then there 

is a possibility of the detection of a 
temporary malfunction.

• Replace the AV control unit if the 

malfunction occurs constantly.

AV

U121E AV CONTROL UNIT

AV-87

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT NAVIGATION]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

U121E AV CONTROL UNIT

DTC Logic

INFOID:0000000005528969

Diagnosis Procedure

INFOID:0000000005528970

1.

CHECK PLAYBACK OF A DISK (CD)

Can a disk (CD) be played?

YES

>> Malfunction may be detected transitory.

NO

>> Replace AV control unit. Refer to 

AV-136, "Exploded View"

.

DTC

Display contents of 

CONSULT-III

DTC detection condition

Possible malfunction factor

U121E

DSP COMM
[U121E]

AV control unit malfunction is detected.

• If a disc can be played, then there 

is a possibility of the detection of a 
temporary malfunction.

• Replace the AV control unit if the 

malfunction occurs constantly.

AV-88

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT NAVIGATION]

U1225 AV CONTROL UNIT

U1225 AV CONTROL UNIT

DTC Logic

INFOID:0000000005528966

DTC DETECTION LOGIC

DTC

Display contents of CON-

SULT-III

DTC detection condition

Possible malfunction factor

U1225

USB CONTROLLER 
[U1225]

USB connection malfunction is detected.

Check that the connection to the USB con-
nector is normal.