Nissan Frontier D40. Manual - part 30

AV-112

< COMPONENT DIAGNOSIS >

[PREMIUM AUDIO (CREW CAB)]

POWER SUPPLY AND GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect microphone and Bluetooth control unit harness con-
nectors.

3.

Check continuity between microphone harness connector R8
(A) terminal 4 and Bluetooth control unit harness connector
B141 (B) terminal 29. 

4.

Check continuity between microphone harness connector R8
(A) terminal 4 and ground. 

Are the continuity test results as specified?

YES

>> Replace the Bluetooth control unit. Refer to 

AV-175, "Removal and Installation"

.

NO

>> Repair harness or connector.

3.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect microphone harness connector R8 and Bluetooth
control unit harness connector B141.

3.

Check continuity between microphone harness connector R8
(A) terminal 2 and Bluetooth control unit harness connector
B141 (B) terminal 8. 

Does continuity exist?

YES

>> Inspection End.

NO

>> Repair harness or connector.

A

B

Continuity

Connector

Terminal

Connector

Terminal

R8

4

B141

29

Yes

A

—

Continuity

Connector

Terminal

R8

4

Ground

No

ALNIA0320GB

A

B

Continuity

Connector

Terminal

Connector

Terminal

R8

2

B141

8

Yes

ALNIA0322GB

AV

FRONT DOOR SPEAKER

AV-113

< COMPONENT DIAGNOSIS >

[PREMIUM AUDIO (CREW CAB)]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

FRONT DOOR SPEAKER

Description

INFOID:0000000005274947

The audio unit sends audio signals to the audio amp. The audio amp. amplifies the audio signals before send-
ing them to the front door speakers using the audio signal circuits.

Diagnosis Procedure

INFOID:0000000005274948

Regarding Wiring Diagram information, refer to 

AV-141, "Wiring Diagram"

.

1.

SPEAKER HARNESS CHECK

1.

Disconnect audio amp. connector B159 and suspect speaker
connector.

2.

Check continuity between audio amp. harness connector B159
(A) and suspect speaker harness connector (B).

3.

Check continuity between audio amp. harness connector B159
(A) and ground.

Are continuity test results as specified?

YES

>> GO TO 2

NO

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

• Repair harness or connector.

2.

FRONT DOOR SPEAKER SIGNAL CHECK

A B

Continuity

Connector

Terminal

Connector

Terminal

B159

15

D15

1

Yes

31

2

16

D110

1

32

2

A

—

Continuity

Connector

Terminal

B159

15

Ground

No

31

16

32

ALNIA0718GB

AV-114

< COMPONENT DIAGNOSIS >

[PREMIUM AUDIO (CREW CAB)]

FRONT DOOR SPEAKER

1.

Connect audio amp. connector B159 and suspect speaker con-
nector.

2.

Turn ignition switch to ACC.

3.

Push “POWER” switch.

4.

Check the signal between audio amp. harness connector B159
terminals with CONSULT-III or oscilloscope.

Is audio signal voltage as specified?

YES

>> Replace suspect speaker. Refer to 

AV-169, "Removal

and Installation"

.

NO

>> GO TO 3

3.

PRE-AMP HARNESS CHECK

1.

Disconnect audio unit connector M65 and audio amp. connector
B159.

2.

Check continuity between audio unit harness connector M65 (A)
and audio amp. harness connector B159 (B).

3.

Check continuity between audio unit harness connector M65 (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.

PRE-AMP SIGNAL CHECK

Connec-

tor

Terminal

Condition

Reference

signal

(+)

(-)

B159

15

31

Receive 
audio sig-
nal

16

32

ALNIA0719GB

SKIA0177E

A

B

Continuity

Connector

Terminal

Connector

Terminal

M65

1

B159

6

Yes

2

22

3

5

4

21

A 

—

Continuity

Connector

Terminal

M65

1

Ground

No

2

3

4

ALNIA0720GB

AV

FRONT DOOR SPEAKER

AV-115

< COMPONENT DIAGNOSIS >

[PREMIUM AUDIO (CREW CAB)]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

1.

Connect audio unit connector and audio amp. connector.

2.

Turn ignition switch ACC.

3.

Push “POWER” switch.

4.

Check the signal between audio unit harness connector M65
terminals with CONSULT-III or oscilloscope.

Are the audio signal voltage readings as specified?

YES

>> Replace audio amp. Refer to 

AV-167, "Removal and

Installation"

.

NO

>> Replace audio unit. Refer to 

AV-166, "Removal and

Installation"

.

Connector

Terminals

Condition

Reference

signal

(+)

(-)

M65

2

1

Receive 
audio sig-
nal

4

3

AWNIA1803ZZ

SKIA0177E