Infiniti QX56 (JA60). Manual - part 74

AV-104

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

SUBWOOFER

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 6.

NO

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

• Repair harness or connector.

6.

REAR DOOR SPEAKER SIGNAL CHECK

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"

.

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

Connector

Terminals

Condition

Reference

signal

(+)

(-)

M42

4

5

Receive 
audio sig-
nal

13

14

ALNIA0419GB

SKIA0177E

AV

AMP ON SIGNAL CIRCUIT

AV-105

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

AMP ON SIGNAL CIRCUIT

Description

INFOID:0000000005146339

When the audio system is turned on, a voltage signal is supplied from the AV control unit to the BOSE speaker

amp. When this signal is received, the BOSE speaker amp. will turn on.

Diagnosis Procedure

INFOID:0000000005146340

Regarding Wiring Diagram information, refer to 

AV-116, "Wiring Diagram"

.

1.

CHECK AMP ON SIGNAL (BOSE SPEAKER AMP)

1. Turn audio system ON.

2. Check voltage between BOSE speaker amp. harness connector

M113 terminal 31 and ground.

Is battery voltage present?

YES

>> Inspection End.

NO

>> GO TO 2.

2.

CHECK AMP ON SIGNAL (AV CONTROL UNIT)

Check voltage between AV control unit harness connector M42 ter-

minal 1 and ground.

Is battery voltage present?

YES

>> Repair harness or connector.

NO

>> Replace AV control unit. Refer to 

AV-169, "Removal and

Installation"

.

31 - Ground

: Battery voltage

ALNIA0369GB

1 - Ground

: Battery voltage

ALNIA0420GB

AV-106

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

STEERING SWITCH

STEERING SWITCH

Description

INFOID:0000000005146341

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

control switch circuit changes depending on which button is pushed.

Diagnosis Procedure

INFOID:0000000005146342

Regarding Wiring Diagram information, refer to 

AV-116, "Wiring Diagram"

.

1.

CHECK STEERING WHEEL AUDIO CONTROL SWITCH RESISTANCE

1. Turn ignition switch OFF.

2. Disconnect steering wheel audio control switch connector M102.

3. Check resistance between steering switch connector terminals.

Do the steering wheel audio control switches check OK?

YES

>> GO TO 2.

NO

>> Replace steering wheel audio control switch. Refer to 

AV-179, "Removal and Installation"

.

2.

CHECK HARNESS

1. Turn ignition switch OFF.

2. Disconnect AV control unit connector M42 and spiral cable con-

nector M30.

3. Check continuity between AV control unit harness connector

M42 (A) and spiral cable harness connector M30 (B).

4. Check continuity between AV control unit connector M42 (A) and ground.

Terminal

Signal name

Condition

Resistance 

(

Ω)

(Approx.)

16

17

Seek (down)

Depress  

switch.

165

Volume (down)

Depress VOL down switch.

487

Phone/Send

Depress 

  switch.

0

20

17

Seek (up)

Depress  

switch.

165

Volume (up)

Depress VOL up switch.

487

Mode/End

Depress  

switch.

0

WKIA4457E

A

B 

Continuity

Connector

Terminal

Connector

Terminal

M42

6

M30

24

Yes

15

31

16

32

A

—

Continuity

Connector

Terminal

M42

6

Ground

No

15

16

ALNIA0332GB

AV

STEERING SWITCH

AV-107

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

C

D

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F

G

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B

A

O

P

Are the continuity results as specified?

YES

>> GO TO 3.

NO

>> Repair harness.

3.

SPIRAL CABLE CHECK

1. Disconnect spiral cable connector M102.

2. Check continuity between spiral cable harness connector M30

(A) and M102 (B).

Does the spiral cable check OK?

YES

>> Inspection End.

NO

>> Replace spiral cable. Refer to 

SR-7, "Removal and Installation"

.

A

B

Continuity

Connector

Terminal

Connector

Terminal

M30

24

M102

20

Yes

31

17

32

16

AWLIA1602ZZ