Nissan Quest E52. Manual - part 170

AV

U121C AV CONTROL UNIT

AV-559

< DTC/CIRCUIT DIAGNOSIS >

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U121C AV CONTROL UNIT

DTC Logic

INFOID:0000000009652340

DTC

Display contents of 

CONSULT

DTC detection condition

Possible malfunction factor

U121C

HDD ACCESS
[U121C]

AV control unit malfunction is detected.

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

AV-610, "Removal and In-

stallation"

.

AV-560

< DTC/CIRCUIT DIAGNOSIS >

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U121D AV CONTROL UNIT

U121D AV CONTROL UNIT

DTC Logic

INFOID:0000000009652341

Diagnosis Procedure

INFOID:0000000009652342

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-610, "Removal and Installation"

.

DTC

Display contents of 

CONSULT

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.
Refer to 

AV-610, "Removal and In-

stallation"

.

AV

U121E AV CONTROL UNIT

AV-561

< DTC/CIRCUIT DIAGNOSIS >

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U121E AV CONTROL UNIT

DTC Logic

INFOID:0000000009652343

Diagnosis Procedure

INFOID:0000000009652344

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-610, "Removal and Installation"

.

DTC

Display contents of 

CONSULT

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.
Refer to 

AV-610, "Removal and In-

stallation"

.

AV-562

< DTC/CIRCUIT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U1225 AV CONTROL UNIT

U1225 AV CONTROL UNIT

DTC Logic

INFOID:0000000009652345

DTC DETECTION LOGIC

DTC

Display contents of CON-

SULT

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.