Infiniti QX56 (JA60). Manual - part 71

AV-92

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

CENTER SPEAKER

YES

>> Replace center speaker. Refer to 

AV-173, "Removal and Installation"

.

NO

>> GO TO 3.

3.

HARNESS CHECK

1. Disconnect AV control unit connector M42 and BOSE speaker

amp. connector M113.

2. Check continuity between AV control unit harness connector

M42 (A) and BOSE speaker amp. harness connector M113 (B).

3. Check continuity between AV control unit harness connector

M42 (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.

FRONT SPEAKER SIGNAL CHECK

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

connector.

2. Turn ignition switch ACC.

3. Push “POWER” switch.

4. Check the signal between AV control unit harness connector

M42 terminals with CONSULT-III or oscilloscope.

Are the audio signal voltage readings as specified?

YES

>> Replace BOSE speaker amp. Refer to 

AV-182,

"Removal and Installation"

.

NO

>> Replace AV control unit. Refer to 

AV-169, "Removal and

Installation"

.

A

B

Continuity

Connector

Terminal

Connector

Terminal

M42

2

M113

18

Yes

3

32

11

19

12

20

A 

—

Continuity

Connector

Terminal

M42

2

Ground

No

3

11

12

ALNIA0416GB

Connector

Terminals

Condition

Reference

signal

(+)

(-)

M42

2

3

Receive 
audio sig-
nal

11

12

ALNIA0417GB

SKIA0177E

AV

REAR DOOR SPEAKER

AV-93

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

REAR DOOR SPEAKER

Description

INFOID:0000000005146331

The AV control 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:0000000005146332

Regarding Wiring Diagram information, refer to 

AV-116, "Wiring Diagram"

.

1.

HARNESS CHECK

1. Disconnect BOSE speaker amp. connectors M112 and suspect

speaker connector.

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

tors M112 (A) and  suspect speaker harness connector (B).

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

tors M112 (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 DOOR SPEAKER SIGNAL CHECK

A

B

Continuity

Connector

Terminal

Connector

Terminal

M112

1

D207

1

Yes

10

2

2

D307

1

3

2

A

—

Continuity

Connector

Terminal

M112

1

Ground

No

10

2

3

ALNIA0352GB

AV-94

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

REAR DOOR SPEAKER

1. Connect BOSE speaker amp. connectors and suspect speaker

connector.

2. Turn ignition switch to ACC.

3. Push “POWER” switch.

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

tors M112 terminals with CONSULT-III or oscilloscope.

Are audio signal voltage readings as specified?

YES

>> Replace suspect speaker. Refer to 

AV-175, "Removal

and Installation"

.

NO

>> GO TO 3.

3.

HARNESS CHECK

1. Disconnect AV control unit connector M42 and BOSE speaker

amp. connector M113.

2. Check continuity between AV control unit harness connector

M42 (A) and BOSE speaker amp. harness connector M113 (B).

3. Check continuity between AV control unit harness connector

M42 (A) and ground.

Are the 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

(+)

(-)

M112

1

10

Receive 
audio sig-
nal

2

3

ALNIA0843GB

SKIA0177E

A

B 

Continuity

Connector

Terminal

Connector

Terminal

M42

4

M113

21

Yes

5

22

13

23

14

33

A

—

Continuity

Connector

Terminal

M42

4

Ground

No

5

13

14

ALNIA0418GB

AV

REAR DOOR SPEAKER

AV-95

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

1. Connect AV control unit connector M42 and BOSE speaker

amp. connector M113.

2. Turn ignition switch to ACC.

3. Push “POWER” switch.

4. Check the signal between AV control unit harness connector

M42 terminals with CONSULT-III or oscilloscope.

Is the audio signal voltage reading as specified?

YES

>> Replace BOSE speaker amp. Refer to 

AV-182,

"Removal and Installation"

.

NO

>> Replace AV control unit. Refer to 

AV-169, "Removal and

Installation"

.

Connector

Terminals

Condition

Reference

signal

(+)

(-)

M42

4

5

Receive 
audio sig-
nal

13

14

ALNIA0419GB

SKIA0177E