Infiniti G37 Coupe. Manual - part 87

AV

SATELLITE RADIO TUNER

AV-101

< ECU DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

JCNWA0460GB

AV-102

< ECU DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

SATELLITE RADIO TUNER

NOTE:
The name MULTIFUNCTION SWITCH indicates the integration of PRESET SWITCH and MULTIFUNCTION
SWITCH virtually.

JCNWA0461GB

AV

MULTI AV SYSTEM SYMPTOMS

AV-103

< SYMPTOM DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

SYMPTOM DIAGNOSIS

MULTI AV SYSTEM SYMPTOMS

Symptom Table

INFOID:0000000001559189

OPERATION

RELATED TO RGB IMAGE

Trouble diagnosis chart by symptom

RELATED TO AUDIO

Trouble diagnosis chart by symptom

Symptoms

Check items

Possible malfunction location / Action to take

Multifunction switch and preset 
switch operation does not work.

• All switches cannot be operated.
• “MULTI AV” is displayed with CON-

SULT-III.

• Multifunction switch power supply and ground circuit.
• AV communication circuits between AV control unit 

and multifunction switch.

Perform CONSULT-III self-diagnosis.Refer to 

AV-26, 

"CONSULT - III Function (MULTI AV)"

.

• All switches cannot be operated.
• “MULTI AV” is not displayed on sys-

tem selection screen the CONSULT-
III is initialized.

AV control unit power supply and ground circuit mal-
function. Refer to 

AV-39, "AV CONTROL UNIT : Diag-

nosis Procedure"

.

Only specified switch cannot be oper-
ated.

Multifunction switch or preset switch malfunction. Per-
form multifunction switch and preset switch self-diagno-
sis function. Refer to

AV-40, "MULTIFUNCTION 

SWITCH : Diagnosis Procedure"

.

Symptoms

Check items

Possible malfunction location / Action to take

RGB image is not shown.

There is malfunction in the CONSULT-
III self-diagnosis result.

Perform CONSULT-III self-diagnosis.
Refer to 

AV-26, "CONSULT - III Function (MULTI AV)"

.

There is no malfunction in CONSULT-III 
self-diagnosis results.

• Display unit power supply circuit.

Refer to 

AV-39, "DISPLAY UNIT : Diagnosis Proce-

dure"

.

• Vertical synchronizing (VP) signal circuit.

Refer to 

AV-48, "Diagnosis Procedure"

.

Color of RGB image is not 
proper.

Light blue (Cyan) tint.

RGB signal (R: red) circuit.
Refer to 

AV-42, "Diagnosis Procedure"

.

Purple (Magenta) tint.

RGB signal (G: green) circuit.
Refer to 

AV-43, "Diagnosis Procedure"

.

Screen looks yellowish.

RGB signal (B: blue) circuit.
Refer to 

AV-44, "Diagnosis Procedure"

.

RGB screen is rolling.

—

RGB synchronizing signal circuit.
Refer to 

AV-45, "Diagnosis Procedure"

.

Fuel economy display is mal-
functioning.

There is malfunction in the CONSULT-
III self-diagnosis result.

Perform CONSULT-III self-diagnosis.
Refer to 

AV-26, "CONSULT - III Function (MULTI AV)"

.

There is no malfunction in CONSULT-III 
self-diagnosis results.

Ignition signal circuit malfunction.
Refer to 

AV-39, "AV CONTROL UNIT : Diagnosis Proce-

dure"

.

Symptoms

Check items

Possible malfunction location / Action to take

The CD cannot be removed.

—

CD eject signal circuit. Refer to 

AV-51, "Diagnosis Pro-

cedure"

.

Audio sound is not heard.

No sound from all speakers.

AV control unit Refer to 

AV-109, "Exploded View"

.

Sound is not heard only from the specif-
ic places (RH front, RH rear, LH front 
and LH rear).

Sound signal circuit of malfunctioning system.

AV-104

< SYMPTOM DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

MULTI AV SYSTEM SYMPTOMS

RELATED TO STEERING SWITCH

Trouble diagnosis chart by symptom

RELATED TO AUXILIARY INPUT

NOTE:
Check that there is no malfunction of AUX equipment main body before performing a diagnosis.

Trouble diagnosis chart by symptom

Satellite radio is not received.

“ANTENNA” is not displayed even when 
the channel is turned to 0 in Satellite ra-
dio mode.

Perform the following inspection procedure.
1.

Check satellite radio antenna mounting nut for 
looseness.
NOTE:
Tightening torque: 6.5 N·m (0.66 kg-m, 58 in-lb.)

2.

Visually check for satellite radio antenna feeder.

3.

Replace the satellite radio antenna.
Refer to 

AV-116, "Exploded View"

.

4.

Replace the satellite radio tuner.
Refer to 

AV-115, "Exploded View"

.

“ANTENNA” is displayed when the 
channel is turned to 0 in Satellite radio 
mode.

Perform the following inspection procedure.
1.

Check the connection between Satellite radio tun-
er and antenna feeder.

2.

Check the connection between Satellite radio an-
tenna and antenna feeder.

3.

Check Antenna feeder for open circuit.

4.

Replace the satellite radio antenna.
Refer to

AV-116, "Exploded View"

.

5.

Replace the satellite radio tuner.
Refer to 

AV-115, "Exploded View"

.

The sound of Satellite radio is 
not heard.

Other audio sounds are normal.

Satellite radio sound signal circuit malfunction between 
satellite radio tuner and AV control unit.

It does not change to Satellite 
radio mode.

There is malfunction in the CONSULT-
III self-diagnosis result.

Perform CONSULT-III self-diagnosis.
Refer to 

AV-26, "CONSULT - III Function (MULTI AV)"

.

AM/FM radio is not received.

Other audio sounds are normal.

• Antenna amp. ON signal circuit.
• Antenna feeder.

Symptoms

Inspection location / Probable malfunction location

None of the steering switch operations work.

Steering switch signal GND circuit.
Refer to 

AV-59, "Diagnosis Procedure"

.

Only specified switch (1) cannot be operated.

Steering switch. Refer to 

AV-119, "Exploded View"

.

“SOURCE”, “MENU UP”, “MENU DOWN” switches of 
steering switch are not operated.

Steering switch signal A circuit.
Refer to 

AV-55, "Diagnosis Procedure"

.

”VOL UP“, “VOL DOWN” switches of steering switch are not 
operated.

Steering switch signal B circuit.
Refer to 

AV-57, "Diagnosis Procedure"

.

Symptoms

Check items

Possible malfunction location / Action to take

Symptoms

Check items

Probable malfunction location

No voice sound is heard when 
AUX mode is selected.

Voice sound is heard when other modes 
are selected.

AUX sound signal circuits malfunction between auxilia-
ry input jacks and AV control unit.

Image is not displayed when 
AUX mode is selected.

—

• AUX image signal circuit malfunction between auxil-

iary input jacks and AV control unit.
Refer to 

AV-49, "Diagnosis Procedure"

.

• Horizontal synchronizing (HP) signal circuit malfunc-

tion between AV control unit and display unit.
Refer to 

AV-47, "Diagnosis Procedure"

.

• RGB area (YS) signal circuit malfunction between AV 

control unit and display unit.
Refer to 

AV-46, "Diagnosis Procedure"

.

It does not change from AUX 
mode to other modes.

—

Vertical synchronizing (VP) signal circuit malfunction 
between AV control unit and display unit.
Refer to 

AV-48, "Diagnosis Procedure"

.