Nissan Altima HL32 Hybrid. Manual - part 7

AV-20

< COMPONENT DIAGNOSIS >

[BASE AUDIO]

TWEETER

1. Connect audio unit connector and 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-III or oscilloscope.

Is the audio signal voltage as specified?

YES

>> Replace tweeter. Refer to 

AV-48, "Removal and Installa-

tion"

.

NO

>> Replace audio unit. Refer to 

AV-46, "Removal and

Installation"

.

Terminals

Condi-

tion

Reference

signal

(+)

(-)

Con-

nec-

tor

Termi-

nal

Con-

nec-

tor

Termi-

nal

M43

2

M43

3

Receive 
audio 
signal

11

12

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SKIA0177E

AV

REAR SPEAKER

AV-21

< COMPONENT DIAGNOSIS >

[BASE AUDIO]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

REAR SPEAKER

Description

INFOID:0000000004219400

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

Diagnosis Procedure

INFOID:0000000004219401

1.

HARNESS CHECK

1. Disconnect audio unit connector M43 (A) and suspect speaker

connector.

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

and suspect speaker harness connector (B).

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

and ground.

Are the continuity results as specified?

YES

>> GO TO 2

NO

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

• Repair harness or connector.

2.

REAR SPEAKER SIGNAL CHECK

Terminals

Continuity

Audio unit 

Speaker

Connector

Terminal

Connector

Terminal

A: M43

4

B: B26

1

Yes

5

2

13

B: B44

1

14

2

Terminals

Continuity

Audio unit 

—

Connector

Terminal

A: M43

4

Ground

No

5

13

14

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AV-22

< COMPONENT DIAGNOSIS >

[BASE AUDIO]

REAR SPEAKER

1. Connect audio unit connector and rear 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-III or oscilloscope.

Is the audio signal voltage as specified?

YES

>> Replace rear speaker. Refer to 

AV-49, "Removal and

Installation"

.

NO

>> Replace audio unit. Refer to 

AV-46, "Removal and

Installation"

.

Terminals

Condi-

tion

Reference

signal

(+)

(-)

Con-

nector

Termi-

nal

Con-

nector

Terminal

M43

4

M43

5

Receive 
audio 
signal

13

14

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SKIA0177E

AV

STEERING SWITCH

AV-23

< COMPONENT DIAGNOSIS >

[BASE AUDIO]

C

D

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STEERING SWITCH

Description

INFOID:0000000004219402

When one of the steering wheel audio control switches is pushed, the resistance in steering switch circuit

changes depending on which button is pushed.

Diagnosis Procedure

INFOID:0000000004219403

1.

CHECK STEERING SWITCH RESISTANCE

1. Disconnect steering switch connector M88.

2. Check resistance between steering switch connector terminals.

Do the steering switches check OK?

YES

>> GO TO 2

NO

>> Replace steering switch. Refer to 

AV-55, "Removal and Installation"

.

2.

CHECK HARNESS

1. Turn ignition switch OFF.

2. Disconnect audio unit connector M43 (A) and spiral cable con-

nector M30 (B).

3. Check continuity between spiral cable harness connector M30

(B) and audio unit harness connector M43 (A).

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

Are the continuity results as specified?

YES

>> GO TO 3

NO

>> Repair harness.

3.

SPIRAL CABLE CHECK

Terminal

Signal name

Condition

Resistance 

(

Ω)

(Approx.)

15

17

Seek (down)

Depress (station) down switch.

165

Volume (down)

Depress volume down switch.

487

14

17

Seek (up)

Depress (station) up switch.

165

Source

Depress source switch.

0

Volume (up)

Depress volume up switch.

487

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A

B

Continuity

Connector

Terminal

Connector

Terminal

M43

6

M30

24

Yes

16

31

15

33

A

—

Connector

Terminal

Continuity

M43

6

Ground

No

15

16

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