Nissan Pathfinder. Manual - part 75

AV

U121C AV CONTROL UNIT

AV-127

< DTC/CIRCUIT DIAGNOSIS >

[MID AUDIO WITHOUT BOSE]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

U121C AV CONTROL UNIT

DTC Logic

INFOID:0000000009174446

CONSULT Display

DTC Detection Condition

Possible Cause

HDD ACCESS
[U121C]

AV control unit malfunction is detected.

If the hard disk drive (HDD) is functioning normal-
ly, there is a possibility of an intermittent malfunc-
tion.
Replace AV control unit if malfunction occurs con-
stantly.
Refer to 

AV-187, "Removal and Installation"

.

AV-128

< DTC/CIRCUIT DIAGNOSIS >

[MID AUDIO WITHOUT BOSE]

U121D AV CONTROL UNIT

U121D AV CONTROL UNIT

DTC Logic

INFOID:0000000009174447

Diagnosis Procedure

INFOID:0000000009174448

1.

CHECK CD PLAYBACK

Check the CD playback operation of the AV control unit. Refer to Owner’s Manual for audio system operating

instructions.
Is the CD playback function of the AV control unit operating normally?

YES

>> Refer to 

GI-49, "Intermittent Incident"

.

NO

>> Replace AV control unit. Refer to 

AV-187, "Removal and Installation"

.

CONSULT Display

DTC Detection Condition

Possible Cause

DSP CONN
[U121D]

AV control unit malfunction is detected.

An intermittent error causing disc player malfunc-
tion may be detected. 
Replace AV control unit if malfunction occurs con-
stantly.
Refer to 

AV-187, "Removal and Installation"

.

AV

U121E AV CONTROL UNIT

AV-129

< DTC/CIRCUIT DIAGNOSIS >

[MID AUDIO WITHOUT BOSE]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

U121E AV CONTROL UNIT

DTC Logic

INFOID:0000000009174449

Diagnosis Procedure

INFOID:0000000009174450

1.

CHECK CD PLAYBACK

Check the CD playback operation of the AV control unit. Refer to Owner’s Manual for audio system operating

instructions.
Is the CD playback function of the AV control unit operating normally?

YES

>> Refer to 

GI-49, "Intermittent Incident"

.

NO

>> Replace AV control unit. Refer to 

AV-187, "Removal and Installation"

.

CONSULT Display

DTC Detection Condition

Possible Cause

DSP COMM
[U121E]

AV control unit malfunction is detected.

An intermittent error causing disc player malfunc-
tion may be detected. 
Replace AV control unit if malfunction occurs con-
stantly.
Refer to 

AV-187, "Removal and Installation"

.

AV-130

< DTC/CIRCUIT DIAGNOSIS >

[MID AUDIO WITHOUT BOSE]

U1225 AV CONTROL UNIT

U1225 AV CONTROL UNIT

DTC Logic

INFOID:0000000009174451

CONSULT Display

DTC Detection Condition

Possible Cause

USB CONTROLLER
[U1225]

USB connection malfunction is detected.

Check that connection to USB connector is nor-
mal.