Infiniti QX56 (JA60). Manual — part 67

AV-76

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

POWER SUPPLY AND GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect the video monitor connector R202 and the DVD

player connector M205.

3. Check continuity between the video monitor harness connector

R202 (A) and the DVD player connector M205 (B).

4. Check continuity between video monitor harness connector R202 (A) and ground.

Are continuity test results as specified?

YES

>> Check DVD player power and ground supply. Refer to

AV-68, "AV CONTROL UNIT : Diagnosis

Procedure"

.

NO

>> Repair harness or connector.

3.

CHECK GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect video monitor connector.

3. Check continuity between video monitor harness connector

R202 and ground.

Does continuity exist?

YES

>> Inspection end.

NO

>> Repair harness or connector.

MICROPHONE
MICROPHONE : Diagnosis Procedure

INFOID:0000000005146310

Regarding Wiring Diagram information, refer to

AV-116, "Wiring Diagram"

.

1.

CHECK POWER SUPPLY CIRCUIT

Check voltage between microphone harness connector R109 termi-

nal 4 and ground.

Is approximately 5V present?

YES

>> GO TO 3.

NO

>> GO TO 2.

A

B

Continuity

Connector

Terminal

Connector

Terminal

R202

11

M205

9

Yes

12

25

A

-

Continuity

Connector

Terminal

R202

11

Ground

No

12

AWLIA1600ZZ

Connector

Terminal

Ignition switch position

Continuity

R202

1

OFF

Yes

2

ALNIA0329GB

Signal name

Connector

Terminal

Ignition switch

position

Value (Approx.)

MIC power

R109

4

ON

5V

WKIA5796E

AV

POWER SUPPLY AND GROUND CIRCUIT

AV-77

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

2.

CHECK POWER SUPPLY CIRCUIT (CONTINUITY)

1. Turn ignition switch OFF.

2. Disconnect microphone and AV control unit harness connectors.

3. Check continuity between microphone harness connector R109

(A) terminal 4 and AV control unit harness connector M45 (B)

terminal 70.

4. Check continuity between microphone harness connector R109

(A) terminal 4 and ground.

Are the continuity test results as specified?

YES

>> Replace the AV control unit. Refer to

AV-169, "Removal and Installation"

.

NO

>> Repair harness or connector.

3.

CHECK GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect microphone harness connector R109 and AV control

unit harness connector M45.

3. Check continuity between microphone harness connector R109

(A) terminal 2 and AV control unit harness connector M45 (B)

terminal 71.

Does continuity exist?

YES

>> Inspection End.

NO

>> Repair harness or connector.

A

B

Continuity

Connector

Terminal

Connector

Terminal

R109

4

M45

70

Yes

A

—

Continuity

Connector

Terminal

R109

4

Ground

No

ALNIA0441GB

A

B

Continuity

Connector

Terminal

Connector

Terminal

R109

2

M45

71

Yes

AWLIA1601ZZ

AV-78

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

RGB (R: RED) SIGNAL CIRCUIT

RGB (R: RED) SIGNAL CIRCUIT

Description

INFOID:0000000005146311

Transmit the image displayed with audio control unit with RGB signal to the display unit.

Diagnosis Procedure

INFOID:0000000005146312

Regarding Wiring Diagram information, refer to

AV-116, "Wiring Diagram"

.

1.

CHECK CONTINUITY RGB (R: RED) 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 17 and AV control unit harness connector M43 (B)

terminal 21.

4. Check continuity between display unit harness connector M93

(A) terminal 17 and ground.

Are the continuity results as specified?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK RGB (R: RED) 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 17 and ground.

Are the voltage readings as specified?

YES

>> Replace display unit. Refer to

AV-171, "Removal and Installation"

.

NO

>> Replace AV control unit. Refer to

AV-169, "Removal and Installation"

.

A

B

Continuity

Connector

Terminal

Connector

Terminal

M93

17

M43

21

Yes

A

—

Continuity

Connector

Terminal

M93

17

Ground

No

ALNIA0409GB

(+)

(-)

Condition

Reference signal

Connector

Terminal

M93

17

Ground

Receive
audio sig-
nal

ALNIA0383GB

SKIB2238J

AV

RGB (G: GREEN) SIGNAL CIRCUIT

AV-79

< COMPONENT DIAGNOSIS >

[AUDIO SYSTEM]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

RGB (G: GREEN) SIGNAL CIRCUIT

Description

INFOID:0000000005146313

Transmit the image displayed with AV control unit with RGB signal to the display unit.

Diagnosis Procedure

INFOID:0000000005146314

Regarding Wiring Diagram information, refer to

AV-116, "Wiring Diagram"

.

1.

CHECK CONTINUITY RGB (G: GREEN) 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 6 and AV control unit harness connector M43 (B)

terminal 22.

4. Check continuity between display unit harness connector M93

(A) terminal 6 and ground.

Are the continuity results as specified?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK RGB (G: GREEN) 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 6 and ground.

Are voltage readings as specified?

YES

>> Replace display unit. Refer to

AV-171, "Removal and Installation"

.

NO

>> Replace AV control unit. Refer to

AV-169, "Removal and Installation"

.

A

B

Continuity

Connector

Terminal

Connector

Terminal

M93

6

M43

22

Yes

A

—

Continuity

Connector

Terminal

M93

6

Ground

No

ALNIA0410GB

(+)

(-)

Condition

Reference signal

Connector

Terminal

M93

6

Ground

Receive
audio sig-
nal

ALNIA0385GB

SKIB2236J