Nissan Xterra. Manual - part 45

AV-172

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION]

U12B0 POWER SUPPLY VOLTAGE

U12B0 POWER SUPPLY VOLTAGE

DTC Logic

INFOID:0000000009485296

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000009485297

1.

CHECK CHARGING SYSTEM

Check the vehicle charging system. Refer to 

CHG-2, "Work Flow (With EXP-800 NI or GR8-1200 NI)"

 or 

CHG-

5, "Work Flow (Without EXP-800 NI or GR8-1200 NI)"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace the malfunctioning components.

2.

CHECK AV CONTROL UNIT POWER SUPPLY AND GROUND CIRCUITS

Perform the AV control unit power supply and ground circuit diagnosis procedure. Refer to 

AV-175, "AV CON-

TROL UNIT : Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> Replace the AV control unit. Refer to 

AV-218, "Removal and Installation"

.

NO

>> Repair or replace harness or connectors.

CONSULT Display

DTC Detection Condition

Possible Cause

Supply Voltage Goes below 9V 
> 20s
[U12B0]

AV control unit supply voltage exceeds lower lim-
its.

• Charging system malfunction.
• AV control unit power supply or ground circuits.

AV

U12B1 POWER SUPPLY VOLTAGE

AV-173

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

U12B1 POWER SUPPLY VOLTAGE

DTC Logic

INFOID:0000000009485298

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000009485299

1.

CHECK CHARGING SYSTEM

Check the vehicle charging system. Refer to 

CHG-2, "Work Flow (With EXP-800 NI or GR8-1200 NI)"

 or 

CHG-

5, "Work Flow (Without EXP-800 NI or GR8-1200 NI)"

.

Is the inspection result normal?

YES

>> Replace the AV control unit. Refer to 

AV-218, "Removal and Installation"

.

NO

>> Repair or replace the malfunctioning components.

CONSULT Display

DTC Detection Condition

Possible Cause

Supply Voltage Goes High > 
16V for 20s
[U12B1]

AV control unit supply voltage exceeds upper lim-
its.

Charging system malfunction.

AV-174

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION]

U1310 AV CONTROL UNIT

U1310 AV CONTROL UNIT

DTC Logic

INFOID:0000000009485300

DTC DETECTION LOGIC

CONSULT Display

DTC Detection Condition

Possible Cause

CONTROL UNIT (AV)
[U1310]

Error during CAN controller hardware initializa-
tion (MCAN).

Replace AV control unit if malfunction occurs 
constantly.
Refer to 

AV-218, "Removal and Installation"

.

AV

POWER SUPPLY AND GROUND CIRCUIT

AV-175

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

POWER SUPPLY AND GROUND CIRCUIT

AV CONTROL UNIT
AV CONTROL UNIT : Diagnosis Procedure

INFOID:0000000009485301

Regarding Wiring Diagram information, refer to 

AV-135, "Wiring Diagram"

.

1.

CHECK FUSE

Check that the following fuses are not blown.

Are the fuses blown?

YES

>> Replace the blown fuse after repairing the affected circuit.

NO

>> GO TO 2.

2.

CHECK POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect AV control unit connector M96 and M97.

3. Check voltage between AV control unit connectors and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness or connectors.

3.

CHECK GROUND CIRCUIT

Check continuity between AV control unit connector M96 and ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Repair or replace harness or connectors.

AUDIO AMP.
AUDIO AMP. : Diagnosis Procedure

INFOID:0000000009485302

Regarding Wiring Diagram information, refer to 

AV-135, "Wiring Diagram"

.

1.

CHECK FUSE

Check that the following fuse is not blown.

Terminal No.

Signal name

Fuse No.

7

ACC power supply

4 (10A)

19

Battery power supply

29 (20A)

37

IGN power supply

12 (10A)

AV control unit

Ground

Condition

Voltage

(Approx.)

Connector

Terminal

M96

19

—

Ignition switch: OFF

Battery voltage

7

Ignition switch: ON

M97

37

AV control unit

Ground

Continuity

Connector

Terminal

M96

20

—

Yes