Nissan Pathfinder (2012 year). Manual - part 24

AV-10

< BASIC INSPECTION >

[BASE AUDIO]

DIAGNOSIS AND REPAIR WORKFLOW

Is malfunctioning part detected?

YES

>> GO TO 4

NO

>> GO TO 2

4.

REPAIR OR REPLACE THE MALFUNCTIONING PART

1. Repair or replace the malfunctioning part.

2. Reconnect parts or connectors disconnected during Diagnostic Procedure.

>> GO TO 5

5.

FINAL CHECK

Refer to confirmed symptom in step 2, and make sure that the symptom is not detected.
Has the symptom been repaired?

YES

>> Inspection End.

NO

>> GO TO 2

August 2012

2012 Pathfinder

AV

AUDIO SYSTEM

AV-11

< SYSTEM DESCRIPTION >

[BASE AUDIO]

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SYSTEM DESCRIPTION

AUDIO SYSTEM

System Diagram

INFOID:0000000007347575

System Description

INFOID:0000000007347576

AUDIO SYSTEM

The audio system consists of the following components

• Audio unit

• Window antenna (audio)

• Front door speakers

• Front tweeters

• Rear door speakers

When the audio system is on, radio signals are received by the window antenna. The audio unit then sends

audio signals to the front door speakers, front tweeters and rear speakers.

Refer to Owner's Manual for audio system operating instructions.

Component Parts Location

INFOID:0000000007347577

AWNIA0625GB

ALNIA0554GB

August 2012

2012 Pathfinder

AV-12

< SYSTEM DESCRIPTION >

[BASE AUDIO]

AUDIO SYSTEM

Component Description

INFOID:0000000007347578

1.

Front tweeter LH M109

2.

Audio unit M38, M60

3.

Front tweeter RH M111

4.

Front door speaker
LH D12
RH D112

5.

Rear door speaker 
LH D209
RH D309

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

August 2012

2012 Pathfinder

AV

POWER SUPPLY AND GROUND CIRCUIT

AV-13

< DTC/CIRCUIT DIAGNOSIS >

[BASE AUDIO]

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DTC/CIRCUIT DIAGNOSIS

POWER SUPPLY AND GROUND CIRCUIT

AUDIO UNIT
AUDIO UNIT : Diagnosis Procedure

INFOID:0000000007347579

Regarding Wiring Diagram information, refer to 

AV-22, "Wiring Diagram"

.

1.

CHECK FUSES

Check that the following fuses 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 M38. 

2. Check voltage between the audio unit connector M38 and

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

M38

19

Ground

Battery 
voltage

Battery 
voltage

Battery 
voltage

7

Ground

0V

Battery 
voltage

Battery 
voltage

WKIA5769E

August 2012

2012 Pathfinder

AV-14

< DTC/CIRCUIT DIAGNOSIS >

[BASE AUDIO]

FRONT DOOR SPEAKER

FRONT DOOR SPEAKER

Description

INFOID:0000000007347580

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

Diagnosis Procedure

INFOID:0000000007347581

Regarding Wiring Diagram information, refer to 

AV-22, "Wiring Diagram"

.

1.

CONNECTOR CHECK

Check the audio unit 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 terminal and connector.

2.

HARNESS CHECK

1. Disconnect audio unit connector M38 (A) and suspect speaker

connector (B).

2. Check continuity between audio unit harness connector M38 (A)

terminal and suspect speaker harness connector (B) terminal.

3. Check continuity between audio unit harness connector M38 (A)

terminal and ground.

Are continuity results as specified?

YES

>> GO TO 3

NO

>> Repair harness or connector.

3.

FRONT SPEAKER SIGNAL CHECK

A B

Continuity

Connector

Terminal

Connector

Terminal

M38

2

D12

1

Yes

3

2

11

D112

1

12

2

A 

—

Continuity

Connector

Terminal

M38

2

Ground

No

3

11

12

AWNIA0031ZZ

August 2012

2012 Pathfinder

AV

FRONT DOOR SPEAKER

AV-15

< DTC/CIRCUIT DIAGNOSIS >

[BASE AUDIO]

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1. Connect audio unit connector and front speaker connector.

2. Turn ignition switch to ACC.

3. Push “POWER” switch.

4. Check the signal between audio unit harness connector termi-

nals with CONSULT or oscilloscope.

Is the audio signal voltage as specified?

YES

>> Replace speaker. Refer to 

AV-37, "Removal and Instal-

lation"

.

NO

>> Replace audio unit. Refer to 

AV-34, "Removal and

Installation"

.

Connector

Terminal

Condition

Reference

signal

(+)

(-)

M38

2

3

Receive audio 
signal

11

12

AWNIA0032ZZ

SKIA0177E

August 2012

2012 Pathfinder

AV-16

< DTC/CIRCUIT DIAGNOSIS >

[BASE AUDIO]

FRONT TWEETER

 FRONT TWEETER 

Description

INFOID:0000000007347582

The audio unit sends audio signals to the front tweeters using the front tweeter circuits.

Diagnosis Procedure

INFOID:0000000007347583

Regarding Wiring Diagram information, refer to 

AV-22, "Wiring Diagram"

.

1.

CONNECTOR CHECK

Check the audio unit 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 terminal and connector.

2.

HARNESS CHECK

1. Disconnect audio unit connector M38 (A) and suspect front

tweeter connector (B).

2. Check continuity between audio unit harness connector M38 (A)

and suspect front tweeter harness connector (B).

3. Check continuity between audio unit harness connector M38 (A)

and ground.

Are the continuity results as specified?

YES

>> GO TO 3

NO

>> Repair harness or connector.

3.

TWEETER SIGNAL CHECK

A

B

Continuity

Connector

Terminal

Connector

Terminal

M38

2

M109

1

Yes

3

2

11

M111

1

12

2

A

—

Continuity

Connector

Terminal

M38

2

Ground

No

3

11

12

AWNIA0031ZZ

August 2012

2012 Pathfinder

AV

FRONT TWEETER

AV-17

< DTC/CIRCUIT DIAGNOSIS >

[BASE AUDIO]

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1. Connect audio unit connector and front tweeter connector.

2. Turn ignition switch to ACC.

3. Push “POWER” switch.

4. Check the signal between audio unit harness connector termi-

nals with CONSULT or oscilloscope.

Is the audio signal voltage as specified?

YES

>> Replace tweeter. Refer to 

AV-36, "Removal and Installa-

tion"

.

NO

>> Replace audio unit. Refer to 

AV-34, "Removal and

Installation"

.

Connector

Terminals

Condition

Reference signal

(+)

(-)

M38

2

3

Receive audio 
signal

11

12

AWNIA0032ZZ

SKIA0177E

August 2012

2012 Pathfinder