Nissan Frontier D40. Manual - part 4

AV-8

< FUNCTION DIAGNOSIS >

[BASE AUDIO]

AUDIO SYSTEM

Component Parts Location

INFOID:0000000005274859

Component Description

INFOID:0000000005274860

1.

Front tweeter (crew cab)
LH M109
RH M111

2.

Audio unit M43

3.

Front door speaker
LH D12
RH D112

4.

Rear door speaker (crew cab)
LH D207
RH D307

5.

Rear door speaker (king cab)
LH B76
RH B160

AWNIA1797ZZ

Part name

Description

Audio unit

Controls audio system functions

Front door speakers

• Outputs audio signal from audio unit
• Outputs high, mid and low range sounds

Front tweeters

• Outputs audio signal from audio unit
• Outputs high range sounds

Rear door speakers

• Outputs audio signal from audio unit
• Outputs high, mid and low range sounds

AV

POWER SUPPLY AND GROUND CIRCUIT

AV-9

< COMPONENT DIAGNOSIS >

[BASE AUDIO]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

COMPONENT DIAGNOSIS

POWER SUPPLY AND GROUND CIRCUIT

AUDIO UNIT

AUDIO UNIT : Diagnosis Procedure

INFOID:0000000005274861

Regarding Wiring Diagram information, refer to 

AV-18, "Wiring Diagram"

.

1.

CHECK FUSES

Check that the following fuses of the audio unit are not are not blown.

Are the fuses OK?

YES

>> GO TO 2

NO

>> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.

2.

POWER SUPPLY CIRCUIT CHECK

1.

Disconnect audio unit connector M43. 

2.

Check voltage between the audio unit connector M43 ground.

Are the voltage results as specified?

YES

>> GO TO 3 

NO

>> • Check connector housings for disconnected or loose terminals.

• Repair harness or connector.

3.

GROUND CIRCUIT CHECK

Inspect audio unit case ground.

Does case ground pass inspection?

YES

>> Inspection end. 

NO

>> Repair audio unit case ground.

Unit

Terminals

Signal name

Fuse No.

Audio unit

19

Battery power

29

7

Ignition switch ACC or ON

4

(+)

(-)

OFF

ACC

ON

Connector

Terminal

M43

7

Ground

0V

Battery 
voltage

Battery 
voltage

19

Ground

Battery 
voltage

Battery 
voltage

Battery 
voltage

ALNIA0674GB

AV-10

< COMPONENT DIAGNOSIS >

[BASE AUDIO]

FRONT DOOR SPEAKER

FRONT DOOR SPEAKER

Description

INFOID:0000000005274862

The audio unit sends audio signals to the front door speakers using the front door speaker circuits.

Diagnosis Procedure

INFOID:0000000005274863

Regarding Wiring Diagram information, refer to 

AV-18, "Wiring Diagram"

.

1.

HARNESS CHECK

1.

Disconnect audio unit connector M43 and suspect speaker con-
nector.

2.

Check continuity between audio unit harness connector M43 (A)
terminal and suspect speaker harness connector (B) terminal.

3.

Check continuity between audio unit harness connector M43 (A)
terminal and ground.

Are continuity results as specified?

YES

>> GO TO 2

NO

>> • Check connector housings for disconnected or loose terminals.

• Repair harness or connector.

2.

FRONT SPEAKER SIGNAL CHECK

A

B

Continuity

Connector

Terminal

Connector

Terminal

M43

2

D12

1

Yes

3

2

11

D112

1

12

2

A

—

Continuity

Connector

Terminal

M43

2

Ground

No

3

11

12

AWNIA0031ZZ

AV

FRONT DOOR SPEAKER

AV-11

< COMPONENT DIAGNOSIS >

[BASE AUDIO]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

1.

Connect audio unit connector M43 and front speaker connector.

2.

Turn ignition switch to ACC.

3.

Push “POWER” switch.

4.

Check the signal between audio unit harness connector M43
terminals with CONSULT-III or oscilloscope.

Is the audio signal voltage as specified?

YES

>> Replace speaker. Refer to 

AV-30, "Removal and Instal-

lation"

.

NO

>> Replace audio unit. Refer to 

AV-28, "Removal and

Installation"

.

(+)

(-)

Condition

Reference signal

Con-

nector

Terminal

Terminal

M43

2

3

Receive 
audio sig-
nal

11

12

AWNIA0032ZZ

SKIA0177E