Nissan Altima HL32 Hybrid. Manual - part 23

AV-84

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITHOUT NAVIGATION]

SUBWOOFER

SUBWOOFER

Description

INFOID:0000000004219450

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

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

Diagnosis Procedure

INFOID:0000000004219451

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

Terminals

Continuity

A B 

Connector

Terminal

Connector

Terminal

B122

53

B120

1

Yes

48

2

45

B124

1

46

2

Terminals

Continuity

A

—

Connector

Terminal

B122

53

Ground

No

48

45

46

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AV

SUBWOOFER

AV-85

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITHOUT NAVIGATION]

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1. Connect BOSE speaker amp. connector B122 and suspect rear

subwoofer connector.

2. Turn ignition switch to ACC.

3. Push “POWER” switch.

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

tor B122 terminals with CONSULT-III or oscilloscope.

Is the audio signal voltage as specified?

YES

>> Replace suspect rear subwoofer. Refer to 

AV-136,

"Removal and Installation"

.

NO

>> GO TO 3

3.

HARNESS CHECK

1. Disconnect audio unit connector M43 and BOSE speaker amp.

connector B121.

2. Check continuity between audio unit harness connector M43 (A)

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

3. Check continuity between audio unit harness connector M43 (A)

terminal 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 SUBWOOFER SIGNAL CHECK

Connector

Terminals

Condition

Reference

signal

(+)

(-)

B122

53

48

Receive au-
dio signal

45

46

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SKIA0177E

Terminals

Continuity

A

B 

Connector

Terminal

Connector

Terminal

M43

4

B121

64

Yes

5

63

13

66

14

65

Terminals

Continuity

A

—

Connector

Terminal

M43

4

Ground

No

5

13

14

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AV-86

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITHOUT NAVIGATION]

SUBWOOFER

1. Connect audio unit connector M43 and BOSE speaker amp.

connector B121.

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 BOSE speaker amp. Refer to 

AV-131,

"Removal and Installation"

.

NO

>> Replace audio unit. Refer to 

AV-130, "Removal and

Installation"

.

Connector

Terminals

Condition

Reference

signal

(+)

(-)

M43

4

5

Receive 
audio sig-
nal

13

14

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SKIA0177E

AV

AMP ON SIGNAL CIRCUIT

AV-87

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITHOUT NAVIGATION]

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AMP ON SIGNAL CIRCUIT

Description

INFOID:0000000004219452

When the audio system is turned on, a voltage signal is supplied from the audio unit to the BOSE speaker

amp. When this signal is received, the BOSE speaker amp. will turn on.

Diagnosis Procedure

INFOID:0000000004219453

1.

CHECK AMP ON SIGNAL (BOSE SPEAKER AMP)

1. Turn audio system ON.

2. Check voltage between BOSE speaker amp. harness connector

B121 terminal 60 and ground.

Is voltage greater than 6.5V?

YES

>> Inspection End.

NO

>> GO TO 2

2.

CHECK AMP ON SIGNAL (AUDIO UNIT)

Check voltage between audio unit harness connector M43 terminal 1

and ground.

Is voltage greater than 6.5V?

YES

>> Repair harness or connector.

NO

>> Replace audio unit. Refer to 

AV-130, "Removal and

Installation"

.

60 - Ground

: More than approx. 6.5V

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1 - Ground

: More than approx. 6.5V

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