Nissan Altima L32. Manual - part 87

AV-340

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

CENTER SPEAKER

1. Disconnect AV control unit connector M47 and BOSE speaker

amp. connector B121.

2. Check continuity between audio unit harness connector M47 (A)

and BOSE speaker amp. harness connector B121 (B).

3. Check continuity between AV control unit harness connector

M47 (A) and ground.

Are continuity test results as specified?

YES

>> GO TO 4

NO

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

• Repair harness or connector.

4.

CENTER SPEAKER SIGNAL CHECK

1. Connect AV control unit connector and BOSE speaker amp.

connector.

2. Turn ignition switch to ACC.

3. Push “POWER” switch.

4. Check the signal between audio unit harness connector M47

terminals with CONSULT-III or oscilloscope.

Is the audio signal voltage reading as specified?

YES

>> Replace BOSE speaker amp. For coupe, refer to 

AV-

438, "Removal and Installation - Coupe"

. For sedan,

refer to 

AV-438, "Removal and Installation - Sedan"

.

NO

>> Replace AV control unit. Refer to 

AV-437, "Removal and

Installation"

.

A

B 

Continuity

Connector

Terminal

Connector

Terminal

M47

2

B121

75

Yes

3

76

11

73

12

74

A 

—

Continuity

Connector

Terminal

M47

2

Ground

No

3

11

12

ALNIA0136ZZ

Connector

Terminals

Condition

Reference

signal

(+)

(-)

M47

2

3

Receive 
audio sig-
nal

11

12

ALNIA0171ZZ

SKIA0177E

AV

REAR TWEETER (COUPE)

AV-341

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

C

D

E

F

G

H

I

J

K

L

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B

A

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REAR TWEETER (COUPE)

Description

INFOID:0000000004206648

The audio unit sends audio signals to the BOSE speaker amp. The BOSE speaker amp. amplifies the audio

signals before sending them to the rear tweeters using the audio signal circuits.

Diagnosis Procedure

INFOID:0000000004206649

1.

HARNESS CHECK

1. Disconnect BOSE speaker amp. connectors B121, B122 and

suspect tweeter connector.

2. Check continuity between BOSE speaker amp. harness connec-

tors B121 (A) and B122 (B) and suspect tweeter harness con-

nector (C).

3. Check continuity between BOSE speaker amp. harness connec-

tors B121 (A) and B122 (B) and ground.

Are the continuity test results as specified?

YES

>> GO TO 2

NO

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

• Repair harness or connector.

2.

REAR TWEETER SIGNAL CHECK

Connector

Terminal

Connector

Terminal

Continuity

A: B121

55

C: D202

2

Yes

68

1

B: B122

49

C: D302

2

54

1

Connector

Terminal

—

Continuity

A: B121

68

Ground

No

55

B: B122

49

54

ALNIA0141ZZ

AV-342

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

REAR TWEETER (COUPE)

1. Connect BOSE speaker amp. connectors B121, B122 and sus-

pect tweeter connector.

2. Turn ignition switch to ACC.

3. Push “POWER” switch.

4. Check the signal between BOSE speaker amp. harness connec-

tors (A) B121 and (B) B122 terminals with CONSULT-III or oscil-

loscope.

Is the audio signal voltage readings as specified?

YES

>> Replace suspect tweeter. Refer to 

AV-444, "Removal

and Installation - Coupe"

.

NO

>> GO TO 3.

3.

HARNESS CHECK

1. Disconnect AV control unit connector M47 and BOSE speaker amp. connector B121.

2. Check continuity between AV control unit harness connector

M47 (A) and BOSE speaker amp. harness connector B121 (B).

3. Check continuity between AV control unit harness connector

M47 (A) and ground.

Are continuity test results as specified?

YES

>> GO TO 4

NO

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

• Repair harness or connector.

4.

REAR TWEETER SIGNAL CHECK

Connector

Terminals

Condition

Reference

signal

(+)

(-)

A: B121

68

55

Receive 
audio sig-
nal

B: B122

54

49

ALNIA0142ZZ

SKIA0177E

A

B 

Continuity

Connector

Terminal

Connector

Terminal

M47

5

B121

64

Yes

6

63

14

66

15

65

A

—

Continuity

Connector

Terminal

M47

5

Ground

No

6

14

15

ALLIA0253ZZ

AV

REAR TWEETER (COUPE)

AV-343

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

1. Connect AV control unit connector M47 and BOSE speaker

amp. connector B121.

2. Turn ignition switch to ACC.

3. Push “POWER” switch.

4. Check the signal between AV control unit harness connector

M47 terminals with CONSULT-III or oscilloscope.

Are the audio signal voltage readings as specified?

YES

>> Replace BOSE speaker amp. Refer to 

AV-438,

"Removal and Installation - Coupe"

.

NO

>> Replace AV control unit. Refer to 

AV-437, "Removal and

Installation"

.

Connector

Terminals

Condition

Reference

signal

(+)

(-)

M47

5

6

Receive audio 
signal

14

15

ALNIA0172ZZ

SKIA0177E