Infiniti QX56 (JA60). Manual - part 69

 

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Infiniti QX56 (JA60). Manual - part 69

 

 

AV-84

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

VERTICAL SYNCHRONIZING (VP) SIGNAL CIRCUIT

VERTICAL SYNCHRONIZING (VP) SIGNAL CIRCUIT

Description

INFOID:0000000005146323

In composite image (AUX image, camera image), transmit the vertical synchronizing (VP) signal and horizon-

tal synchronizing (HP) signal from display unit to AV control unit so as to synchronize the RGB images dis-

played with AV control unit such as the image quality adjusting menu, etc.

Diagnosis Procedure

INFOID:0000000005146324

Regarding Wiring Diagram information, refer to 

AV-116, "Wiring Diagram"

.

1.

CHECK CONTINUITY VERTICAL SINCHRONIZING (VP) SIGNAL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect display unit connector M93 and AV control unit con-

nector M43.

3. Check continuity between display unit harness connector M93

(A) terminal 20 and AV control unit harness connector M43 (B)

terminal 29.

4. Check continuity between display unit harness connector M93

(A) terminal 20 and ground.

Are continuity results as specified?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK VERTICAL SINCHRONIZING (VP) SIGNAL

1. Connect display unit connector M93 and AV control unit connec-

tor M43.

2. Turn ignition switch ON.

3. Check signal between display unit harness connector M93 ter-

minal 20 and ground.

Are voltage readings as specified?

YES

>> Replace AV control unit. Refer to 

AV-169, "Removal and Installation"

.

NO

>> Replace display unit. Refer to 

AV-171, "Removal and Installation"

.

A

B

Continuity

Connector

Terminal

Connector

Terminal

M93

20

M43

29

Yes

A

Continuity

Connector

Terminal

M93

20

Ground

No

ALNIA0415GB

(+)

(-)

Condition

Reference signal

Connector

Terminal

M93

20

Ground

Receive 
audio sig-
nal

ALNIA0393GB

SKIB3598E

AV

FRONT DOOR SPEAKER

AV-85

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

FRONT DOOR SPEAKER

Description

INFOID:0000000005146325

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 front door speakers using the audio signal circuits.

Diagnosis Procedure

INFOID:0000000005146326

Regarding Wiring Diagram information, refer to 

AV-116, "Wiring Diagram"

.

1.

HARNESS CHECK

1. Disconnect BOSE speaker amp. connector M112 and suspect

speaker connector.

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

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

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

tor M112 (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 SPEAKER SIGNAL CHECK

A B

Continuity

Connector

Terminal

Connector

Terminal

M112

4

D12

1

Yes

5

2

8

D112

1

13

2

A

Continuity

Connector

Terminal

M112

4

Ground

No

5

8

13

ALNIA0342GB

AV-86

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

FRONT DOOR SPEAKER

1. Connect BOSE speaker amp. connector M112 and suspect

speaker connector.

2. Turn ignition switch to ACC.

3. Push “POWER” switch.

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

tor M112 terminals with CONSULT-III or oscilloscope.

Is audio signal voltage as specified?

YES

>> Replace suspect speaker. Refer to 

AV-174, "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

Connec-

tor

Terminal

Condition

Reference

signal

(+)

(-)

M112

4

5

Receive 
audio sig-
nal

8

13

ALNIA0343GB

SKIA0177E

A

B

Continuity

Connector

Terminal

Connector

Terminal

M42

2

M113

18

Yes

3

32

11

19

12

20

Continuity

Connector

Terminal

M42

2

Ground

No

3

11

12

ALNIA0416GB

AV

FRONT DOOR SPEAKER

AV-87

< 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 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"

.

Connector

Terminals

Condition

Reference

signal

(+)

(-)

M42

2

3

Receive 
audio sig-
nal

11

12

ALNIA0417GB

SKIA0177E

 

 

 

 

 

 

 

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