Infiniti FX35 / FX45. Manual - part 145

 

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Infiniti FX35 / FX45. Manual - part 145

 

 

AV-34

< SERVICE INFORMATION >

AUDIO

Terminal and Reference Value for Satellite Radio Tuner

INFOID:0000000001328682

A/C and AV Switch Self-Diagnosis Function

INFOID:0000000001328683

It can check ON/OFF operation of each switch in the A/C and AV switch and diagnose the input signals to the
audio steering wheel switch.

Terminal

(Wire color)

Item

Signal 

input/

output

Condition

Reference value

+

Ignition 

switch

Operation

2 (B)

1 (R)

Satellite radio audio 
signal LH

Output

ON

Receive satellite radio audio 
signal

4 (G)

3 (W)

Satellite radio audio 
signal RH

Output

ON

Receive satellite radio audio 
signal

5

Shield

6

Shield

8 (L)

Ground

Communication signal
REQ (SAT-AUDIO)

Output

ON

When setting to satellite ra-
dio mode

9 (L/R)

Ground

Communication signal
Tx (SAT-AUDIO)

Output

ON

When setting to satellite ra-
dio mode

10 (L/W)

Ground

Communication signal
Rx (AUDIO-SAT)

Input

ON

When setting to satellite ra-
dio mode

12 (Y)

Ground

Battery power supply

Input

OFF

Battery voltage

15 (B)

Ground

Ground

ON

Approx. 0 V

16 (P)

Ground

ACC power supply

Input

ACC

Battery voltage

17

Satellite radio antenna

SKIB3609E

SKIB3609E

SKIB7338E

SKIB7337E

SKIB7336E

AUDIO

AV-35

< SERVICE INFORMATION >

C

D

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F

G

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A

B

AV

N

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STARTING THE SELF-DIAGNOSIS MODE

1.

Turn ignition switch from OFF to ACC.

2.

Within 10 seconds press and hold the switches “1” and “6”
simultaneously for 3 seconds.

DIAGNOSIS FUNCTION 

The following are checked:

• All the indicators (LED) in the A/C and AV switch.
• Continuity of the switches by sounding the buzzer when the A/C and AV switch and audio steering wheel

switch is pressed.

• Continuity of harness between A/C and AV switch and audio steering switch.
NOTE:
Rear window defogger switch operation is not checked. (No beep sound even under normal status)

EXITING THE SELF-DIAGNOSIS MODE

• Turn ignition switch OFF.

Trouble Diagnosis

INFOID:0000000001328684

• The majority of the audio malfunctions are the result of outside causes (bad CD, electromagnetic interfer-

ence, etc.). Check the symptoms below to diagnose the malfunction.

• The vehicle itself can be a source of noise if noise prevention parts or electrical equipment is malfunctioning.

Check if noise is caused and/or changed by engine speed, ignition switch turned to each position, and oper-
ation of each piece of electrical equipment, and then determine the cause.

• Make sure that other operation except audio system can be performed with A/C and AV switch. If these

operations are inoperative with A/C and AV switch, refer to 

AV-79, "Unable to Operate System with A/C and

AV Switch"

  (Without navigation system), or 

AV-127, "Unable to Operate System with A/C and AV Switch"

(With navigation system).

• Refer to "SERVICE BULLETIN ITB04-055" for the diagnosis of satellite radio.

SKIB8660E

Symptom

Possible malfunction location

Audio system does not work properly.

• Audio unit power supply circuit
• Communication signal circuit between audio unit and display control unit
• A/C and AV switch
• Audio unit

No sound can be heard from all speakers.

• BOSE speaker amp. power supply and ground circuit
• BOSE speaker amp. ON signal circuit
• Audio unit
• BOSE speaker amp.

No sound can be heard from one or several speakers.

• Audio signal circuit between audio unit and BOSE speaker amp.
• Audio signal circuit between BOSE speaker amp. and speaker
• Speaker
• Tweeter
• Audio unit
• BOSE speaker amp.

No sound can be heard from woofer.

• Audio signal circuit between BOSE speaker amp. and woofer
• Woofer
• BOSE speaker amp.

AV-36

< SERVICE INFORMATION >

AUDIO

NOTE:
Noise resulting from variations in field strength, such as fading noise and multi-path noise, or external noise
from trains and other sources. It is not a malfunction.
• Fading noise: This noise occurs because of variations in the field strength in a narrow range due to moun-

tains or buildings blocking the signal.

• Multi-path noise: This noise results from a time difference between the broadcast waves directly from the

station arriving at the antenna and the waves reflected by mountains or buildings.

Power Supply Circuit Inspection

INFOID:0000000001328685

1.

CHECK FUSE

Make sure that the following fuses of the BOSE speaker amp., woofer, and audio unit are not blown.

OK or NG

OK

>> GO TO 2.

NG

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

PG-

3

.

2.

CHECK POWER SUPPLY CIRCUIT

1.

Check voltage between audio unit harness connector terminals
and ground.

No sound can be heard from radio or noise is caught.

• Antenna amp. ON signal circuit
• Antenna feeder
• Roof antenna
• Antenna amp.
• Audio unit

Audio steering switch does not operate properly.

• Remote control signal circuit between audio steering switch and A/C and 

AV switch

• Audio steering switch
• Spiral cable
• TEL adapter unit (With telephone system)
• A/C and AV switch

Symptom

Possible malfunction location

Unit

Terminal

Signal name

Fuse No.

Audio unit

6

Battery power supply

32

10

 ACC power supply

6

BOSE speaker amp.

1

Battery power supply

17

Woofer

1

Battery power supply

32

Terminals

Ignition 

switch

Voltage

(+)

(–)

Connector

Terminal

M58

6

Ground

OFF

Battery voltage

10

Ground

ACC

Battery voltage

PKIA3814E

AUDIO

AV-37

< SERVICE INFORMATION >

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AV

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2.

Check voltage between BOSE speaker amp. harness connector
terminal or woofer harness connector terminal and ground.

OK or NG

OK

>> • INSPECTION END (Audio unit is OK.)

• GO TO 3. (BOSE speaker amp. and woofer)

NG

>> Repair harness or connector between each unit and

fuse.

3.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BOSE speaker amp. and woofer connectors.

3.

Check continuity between BOSE speaker amp. harness connec-
tor B212 terminal 17 and ground.

4.

Check continuity between woofer harness connector B223 ter-
minal 2 and ground.

OK or NG

OK

>> INSPECTION END (System is OK.)

NG

>> Repair harness or connector.

Audio Steering Wheel Switch Inspection

INFOID:0000000001328686

1.

CHECK A/C AND AV SWITCH SELF-DIAGNOSIS FUNCTION

1.

Start A/C and AV switch self-diagnosis function. Refer to 

AV-34, "A/C and AV Switch Self-Diagnosis Func-

tion"

.

2.

Operate audio steering wheel switch.

Does audio steering wheel switch operate normally?

YES

>> INSPECTION END

Terminals

Ignition 

switch

Voltage

(+)

(–)

Connector

Terminal

B212

1

Ground

OFF

Battery voltage

B223

1

Ground

OFF

Battery voltage

SKIA8931E

17 – Ground

: Continuity should exist.

SKIA4312E

2 – Ground

: Continuity should exist.

SKIB8692E

 

 

 

 

 

 

 

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