Infiniti G37 Coupe. Manual — part 72

AV

POWER SUPPLY AND GROUND CIRCUIT

AV-41

< COMPONENT DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

2.

CHECK POWER SUPPLY CIRCUIT

Check voltage between multifunction switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Check harness between multifunction switch and fuse.

3.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect multifunction switch connector.

3.

Check continuity between multifunction switch harness connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

SATELLITE RADIO TUNER

SATELLITE RADIO TUNER : Diagnosis Procedure

INFOID:0000000001689653

1.

CHECK FUSE

Check for blown fuses.

Is the inspection result normal?

YES

>> GO TO 2.

NO

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

2.

CHECK POWER SUPPLY CIRCUIT

Check voltage between satellite radio tuner harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Check harness between satellite radio tuner and fuse.

3.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect satellite radio tuner.

3.

Check continuity between satellite radio tuner harness connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

Signal name

Connector No.

Terminal No.

Ignition switch position

Value (Approx.)

ACC power supply

M72

3

ACC

12 V

Signal name

Connector No.

Terminal No.

Ignition switch position

Continuity

Ground

M72

1

OFF

Existed

Power source

Fuse No.

Battery

34

Ignition switch ACC or ON

19

Signal name

Connector No.

Terminal No.

Ignition switch position

Value (Approx.)

Battery power supply

B236

12

OFF

12 V

ACC power supply

B236

16

ACC

12 V

Signal name

Connector No.

Terminal No.

Ignition switch position

Continuity

Ground

B236

15

OFF

Existed

AV-42

< COMPONENT DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

RGB (R: RED) SIGNAL CIRCUIT

RGB (R: RED) SIGNAL CIRCUIT

Description

INFOID:0000000001689661

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

Diagnosis Procedure

INFOID:0000000001689662

1.

CHECK CONTINUITY RGB (R: RED) SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect display unit connector and AV control unit connector.

3.

Check continuity between display unit harness connector terminal 17 and AV control unit harness connec-
tor terminal 40.

4.

Check continuity between display unit harness connector terminal 17 and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK RGB (R: RED) SIGNAL

1.

Connect display unit connector and AV control unit connector.

2.

Turn ignition switch ON.

3.

Check signal between display unit harness connector terminal 17 and ground.

Is the inspection result normal?

YES

>> Replace display unit.

NO

>> Replace AV control unit.

17 - 40

: Continuity should exist.

17 - Ground

: Continuity should not exist.

Terminal

Condition

Reference value

17 - Ground

Ignition

switch

ON

Start confirmation/adjustment
mode, and then display color bar
by selecting “Color Spectrum Bar”
on DISPLAY DIAGNOSIS screen.

SKIB2238J

AV

RGB (G: GREEN) SIGNAL CIRCUIT

AV-43

< COMPONENT DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

RGB (G: GREEN) SIGNAL CIRCUIT

Description

INFOID:0000000001689663

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

Diagnosis Procedure

INFOID:0000000001689664

1.

CHECK CONTINUITY RGB (G: GREEN) SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect display unit connector and AV control unit connector.

3.

Check continuity between display unit harness connector terminal 6 and AV control unit harness connec-
tor terminal 39.

4.

Check continuity between display unit harness connector terminal 6 and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK RGB (G: GREEN) SIGNAL

1.

Connect display unit connector and AV control unit connector.

2.

Turn ignition switch ON.

3.

Check signal between display unit harness connector terminal 6 and ground.

Is the inspection result normal?

YES

>> Replace display unit.

NO

>> Replace AV control unit.

6 - 39

: Continuity should exist.

6 - Ground

: Continuity should not exist.

Terminal

Condition

Reference value

6 - Ground

Ignition

switch

ON

Start confirmation/adjustment
mode, and then display color bar
by selecting “Color Spectrum Bar”
on DISPLAY DIAGNOSIS screen.

SKIB2236J

AV-44

< COMPONENT DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

RGB (B: BLUE) SIGNAL CIRCUIT

RGB (B: BLUE) SIGNAL CIRCUIT

Description

INFOID:0000000001689665

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

Diagnosis Procedure

INFOID:0000000001689666

1.

CHECK CONTINUITY RGB (B: BLUE) SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect display unit connector and AV control unit connector.

3.

Check continuity between display unit harness connector terminal 18 and AV control unit harness connec-
tor terminal 38.

4.

Check continuity between display unit harness connector terminal 18 and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK RGB (B: BLUE) SIGNAL

1.

Connect display unit connector and AV control unit connector.

2.

Turn ignition switch ON.

3.

Check signal between display unit harness connector terminal 18 and ground.

Is the inspection result normal?

YES

>> Replace display unit.

NO

>> Replace AV control unit.

18 - 38

: Continuity should exist.

18 - Ground

: Continuity should not exist.

Terminal

Condition

Reference value

18 - Ground

Ignition

switch

ON

Start confirmation/adjustment
mode, and then display color bar
by selecting “Color Spectrum Bar”
on DISPLAY DIAGNOSIS screen.

SKIB2237J