Nissan Xterra. Manual - part 46

AV-176

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION]

POWER SUPPLY AND GROUND CIRCUIT

Is the fuse 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 audio amplifier connector B158.

3. Check voltage between audio amplifier connector B158 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 audio amplifier connector B158 and ground.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Repair or replace harness or connectors.

Terminal No.

Signal name

Fuse No.

1

Battery power supply

17 (15A)

17

Audio amplifier

Ground

Condition

Voltage

(Approx.)

Connector

Terminal

B158

1

—

Ignition switch: OFF

Battery voltage

17

Audio amplifier

Ground

Continuity

Connector

Terminal

B158

4

—

Yes

20

AV

FRONT DOOR SPEAKER

AV-177

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

FRONT DOOR SPEAKER

Diagnosis Procedure

INFOID:0000000009485303

Regarding Wiring Diagram information, refer to 

AV-135, "Wiring Diagram"

.

1.

CONNECTOR CHECK

Check the AV control unit, audio amplifier and speaker connectors for the following:

•  Proper connection

•  Damage

•  Disconnected or loose terminals
Is the inspection result normal?

YES

>> GO TO 2

NO

>> Repair the terminals or connectors.

2.

CHECK FRONT DOOR SPEAKER SIGNAL CIRCUIT CONTINUITY

1. Disconnect audio amplifier connector B159 and suspect front door speaker connector.

2. Check continuity between audio amplifier connector B159 and suspect front door speaker connector.

3. Check continuity between audio amplifier connector B159 and ground.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Repair or replace harness or connectors.

3.

CHECK FRONT DOOR SPEAKER SIGNAL

1. Connect audio amplifier connector B159 and suspect front door speaker connector.

2. Turn ignition switch to ACC.

3. Push AV control unit POWER switch.

4. Check signal between the terminals of audio amplifier connector B159.

Audio amplifier

Front door speaker

Continuity

Connector

Terminal

Connector

Terminal

B159

15

D12 (LH)

1

Yes

31

2

16

D112 (RH)

1

32

2

Audio amplifier

Ground

Continuity

Connector

Terminal

B159

15

—

No

31

16

32

Audio amplifier connector B159

Condition

Reference value

(+)

(

−)

Terminal

Terminal

AV-178

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION]

FRONT DOOR SPEAKER

Is the inspection result normal?

YES

>> Replace front door speaker. Refer to 

AV-221, "Removal and Installation"

.

NO

>> GO TO 4.

4.

CHECK PRE-AMP SIGNAL CIRCUIT CONTINUITY

1. Disconnect AV control unit connector M96 and audio amplifier connector B159.

2. Check continuity between AV control unit connector M96 and audio amplifier connector B159.

3. Check continuity between AV control unit connector M96 and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace harness or connectors.

5.

CHECK PRE-AMP SIGNAL

1. Connect AV control unit connector M96 and audio amplifier connector B159.

2. Turn ignition switch to ACC.

3. Push AV control unit POWER switch.

4. Check signal between the terminals of AV control unit connector M96.

Is the inspection result normal?

15

31

Audio signal output

16

32

SKIA0177E

AV control unit

Audio amplifier

Continuity

Connector

Terminal

Connector

Terminal

M96

2

B159

22

Yes

3

6

11

21

12

5

AV control unit

Ground

Continuity

Connector

Terminal

M96

2

—

No

3

11

12

AV control unit connector M96

Condition

Reference value

(+)

(

−)

Terminal

Terminal

2

3

Audio signal output

11

12

SKIA0177E

AV

FRONT DOOR SPEAKER

AV-179

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

YES

>> Replace audio amplifier. Refer to 

AV-219, "Removal and Installation"

.

NO

>> Replace AV control unit. Refer to 

AV-218, "Removal and Installation"

.