Infiniti QX56 (JA60). Manual - part 65

AV-68

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

POWER SUPPLY AND GROUND CIRCUIT

POWER SUPPLY AND GROUND CIRCUIT

AV CONTROL UNIT
AV CONTROL UNIT : Diagnosis Procedure

INFOID:0000000005146301

Regarding Wiring Diagram information, refer to 

AV-116, "Wiring Diagram"

.

1.

CHECK FUSES

Check that the following AV control unit fuses are not blown.

Are the fuses OK?

YES

>> GO TO 2.

NO

>> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.

2.

POWER SUPPLY CIRCUIT CHECK

1. Disconnect AV control unit connectors M42 and M45. 

2. Check voltage between the AV control unit connectors M42 and

M45 and ground.

Are the voltage results as specified?

YES

>> GO TO 3.

NO

>> • Check connector housings for disconnected or loose

terminals.

• Repair harness or connector.

3.

GROUND CIRCUIT CHECK

Unit

Terminals

Signal name

Fuse No.

AV control unit

19

Battery power

31

66

68

7

Ignition switch ACC or ON

4

69

79

Ignition switch ON or START

12

(+)

(-)

OFF

ACC

ON

Connector

Terminal

M42

7

Ground

0V

Battery 
voltage

Battery 
voltage

19

Ground

Battery 
voltage

Battery 
voltage

Battery 
voltage

M45

66

Ground

Battery 
voltage

Battery 
voltage

Battery 
voltage

68

Ground

Battery 
voltage

Battery 
voltage

Battery 
voltage

69

Ground

0V

Battery 
voltage

Battery 
voltage

79

Ground

0V

0V

Battery 
voltage

AWNIA1554ZZ

AV

POWER SUPPLY AND GROUND CIRCUIT

AV-69

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

1. Ignition OFF.

2. Check continuity between AV control unit harness connectors

M42 and M45 and ground.

Are the continuity results as specified?

YES

>> Inspection End.

NO

>> Repair AV control unit ground.

DISPLAY UNIT
DISPLAY UNIT : Diagnosis Procedure

INFOID:0000000005146302

Regarding Wiring Diagram information, refer to 

AV-116, "Wiring Diagram"

.

1.

CHECK POWER SUPPLY CIRCUIT

1. Turn ignition switch to ACC

2. Check voltage between display unit harness connector M93 and

ground.

Does specified voltage exist?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect display unit connector.

3. Check continuity between display unit harness connector M93

and ground.

Does continuity exist?

YES

>> Inspection end. 

Connector

(+)

(-)

Continuity

Terminal

M42

20

Ground

Yes

M45

65

67

86

87

AWNIA1555ZZ

Signal name

Connector

Terminal

Ignition switch 

position

Value (Approx.)

B+

M93

2

ACC

Battery voltage

ACC

3

ALNIA0317GB

(+)

(-)

Continuity

Connector

Terminal

M93

1

Ground

Yes

13

ALNIA0407GB

AV-70

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

POWER SUPPLY AND GROUND CIRCUIT

NO

>> Repair harness or connector.

A/C AND AV SWITCH ASSEMBLY
A/C AND AV SWITCH ASSEMBLY : Diagnosis Procedure

INFOID:0000000005146303

Regarding Wiring Diagram information, refer to 

AV-116, "Wiring Diagram"

.

1.

CHECK FUSE

Check that the A/C and AV switch assembly fuse is not blown.

Is the fuse OK?

YES

>> GO TO 2.

NO

>> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.

2.

POWER SUPPLY CIRCUIT CHECK

1. Disconnect A/C and AV switch assembly connector M98. 

2. Check voltage between the A/C and AV switch assembly con-

nector M98 and ground.

Are the voltage results as specified?

YES

>> GO TO 3.

NO

>> • Check connector housings for disconnected or loose

terminals.

• Repair harness or connector.

3.

GROUND CIRCUIT CHECK

1. Ignition OFF.

2. Check continuity between A/C and AV switch assembly harness

connector M98 and ground.

Are the continuity results as specified?

YES

>> Inspection End.

NO

>> Repair A/C and AV switch assembly ground.

BOSE SPEAKER AMP
BOSE SPEAKER AMP : Diagnosis Procedure

INFOID:0000000005146304

Regarding Wiring Diagram information, refer to 

AV-116, "Wiring Diagram"

.

1.

CHECK FUSE

Check that the BOSE speaker amp. fuse is not blown.

Unit

Terminal

Signal name

Fuse No.

A/C and AV switch assembly

2

Ignition switch ACC or ON

4

(+)

(-)

OFF

ACC

ON

Connector

Terminal

M98

2

Ground

0V

Battery 
voltage

Battery 
voltage

ALNIA0315GB

(+)

(-)

Continuity

Connector

Terminal

M98

1

Ground

Yes

ALNIA0316GB

AV

POWER SUPPLY AND GROUND CIRCUIT

AV-71

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

Are the fuses OK?

YES

>> GO TO 2.

NO

>> Be sure to eliminate cause of malfunction before installing new fuse.

2.

CHECK POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BOSE speaker amp. connector.

3. Check voltage between BOSE speaker amp. harness connector

M112 terminal 11 and ground.

Is battery voltage present?

YES

>> GO TO 3.

NO

>> Check harness between BOSE speaker amp. and fuse.

3.

CHECK GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BOSE speaker amp. connector.

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

tor M112 terminal 12 and ground.

Does continuity exist?

YES

>> Inspection End.

NO

>> Repair harness or connector.

WOOFER
WOOFER : Diagnosis Procedure

INFOID:0000000005146305

Regarding Wiring Diagram information, refer to 

AV-116, "Wiring Diagram"

.

1.

CHECK FUSE

Check that the subwoofer fuse is not blown.

Is the fuse OK?

YES

>> GO TO 2.

NO

>> Be sure to eliminate cause of malfunction before installing new fuse.

2.

CHECK POWER SUPPLY CIRCUIT

Unit

Terminal

Signal name

Fuse No.

BOSE speaker amp.

11

Battery power

31

(+)

(-)

Voltage (approx.)

Connector

Terminal

M112

11

Ground

Battery voltage

ALNIA0339GB

(+)

(-)

Continuity

Connector

Terminal

M112

12

Ground

Yes

ALNIA0340GB

Unit

Terminal

Signal name

Fuse No.

Subwoofer

6

Battery power

17