Nissan Altima L32. Manual - part 88

AV-344

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

REAR DOOR SPEAKER (SEDAN)

REAR DOOR SPEAKER (SEDAN)

Description

INFOID:0000000004206650

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 door speakers using the audio signal circuits.

Diagnosis Procedure

INFOID:0000000004206651

1.

HARNESS CHECK

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

suspect speaker connector.

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

tors B121 (A) and B122 (B) and suspect speaker 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 DOOR SPEAKER 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

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AV

REAR DOOR SPEAKER (SEDAN)

AV-345

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

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

pect speaker 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 speaker. Refer to 

AV-443, "Removal

and Installation - Sedan"

.

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 DOOR SPEAKER SIGNAL CHECK

Connector

Terminals

Condition

Reference

signal

(+)

(-)l

A: B121

68

55

Receive 
audio sig-
nal

B: B122

54

49

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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

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AV-346

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

REAR DOOR SPEAKER (SEDAN)

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 - Sedan"

.

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

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SKIA0177E

AV

SUBWOOFER (COUPE)

AV-347

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

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SUBWOOFER (COUPE)

Description

INFOID:0000000004206652

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

signals before sending them to the subwoofers using the audio signal circuits.

Diagnosis Procedure

INFOID:0000000004206653

1.

HARNESS CHECK

1. Disconnect BOSE speaker amp. connector B122 and suspect

rear subwoofer connector.

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

tor B122 (A) and suspect rear subwoofer harness connector (B).

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

tor B122 (A) 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 SUBWOOFER SIGNAL CHECK

A B 

Continuity

Connector

Terminal

Connector

Terminal

B122

53

B25

1

Yes

48

2

45

B47

1

46

2

A

—

Continuity

Connector

Terminal

B122

53

Ground

No

48

45

46

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