Infiniti FX35, FX50 (S51). Manual - part 86

AV

MICROPHONE SIGNAL CIRCUIT

AV-117

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MICROPHONE SIGNAL CIRCUIT

Description

INFOID:0000000005246836

Supply power from TEL adapter unit to microphone. The microphone transmits the sound/voice to the micro-
phone.

Diagnosis Procedure

INFOID:0000000005246837

1.

CHECK CONTINUITY BETWEEN TEL ADAPTER UNIT AND MICROPHONE CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect TEL adapter unit connector and microphone connector.

3.

Check continuity between TEL adapter unit harness connector and microphone harness connector.

4.

Check continuity between TEL adapter unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK VOLTAGE MICROPHONE VCC 

1.

Connect TEL adapter unit connector.

2.

Turn ignition switch ON.

3.

Check voltage between TEL adapter unit harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace TEL adapter unit. Refer to 

AV-155, "Exploded View"

.

3.

CHECK MICROPHONE SIGNAL 

1.

Turn ignition switch OFF.

2.

Connect microphone connector.

3.

Turn ignition switch ON.

4.

Check signal between TEL adapter unit harness connector.

TEL adapter unit

Microphone

Continuity

Connector

Terminals

Connector

Terminals

B87

7

R17

1

Existed

8

2

29

4

TEL adapter unit

Ground

Continuity

Connector

Terminals

B87

7

Not existed

29

(+)

(

−

)

Voltage

(Approx.)

TEL adapter unit

TEL adapter unit

Connector

Terminal

Connector

Terminal

B87

29

B87

8

5.0  V

AV-118

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MICROPHONE SIGNAL CIRCUIT

Is the inspection result normal?

YES

>> Replace TEL adapter unit. Refer to 

AV-155, "Exploded View"

.

NO

>> Replace microphone. Refer to

AV-152, "Exploded View"

.

(+)

(

−

)

Condition

Reference value

TEL adapter unit

TEL adapter unit

Connector

Terminal

Connector

Terminal

B87

7

B87

8

Give a voice.

PKIB5037J

AV

CONTROL SIGNAL CIRCUIT

AV-119

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CONTROL SIGNAL CIRCUIT

Description

INFOID:0000000005246838

TEL adapter unit identifies the vehicle model according to the control signal and performs the control.

Diagnosis Procedure

INFOID:0000000005246839

1.

CHECK CONTINUITY CONTROL SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect TEL adapter unit connector.

3.

Check continuity between TEL adapter unit harness connector and ground.

Is the inspection result normal?

YES

>> Replace TEL adapter unit.

NO

>> Repair harness or connector.

TEL adapter unit

Ground

Continuity

Connector

Terminals

B87

20

Existed

23

24

AV-120

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MODE CHANGE SIGNAL CIRCUIT

MODE CHANGE SIGNAL CIRCUIT

Description

INFOID:0000000005530051

• AV control unit transmits the mode change signal to BOSE amp. 
• Driver's Audio Stage controls the speaker's output characteristic by BOSE amp. so that the driver's seat is to

be the center of sounds.

Diagnosis Procedure

INFOID:0000000005530052

1.

CHECK CONTINUITY MODE CHANGE SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BOSE amp. connector and AV control unit connector.

3.

Check continuity between BOSE amp. harness connector and AV control unit harness connector.

4.

Check continuity between BOSE amp. harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK MODE CHANGE SIGNAL

1.

Connect BOSE amp. connector.

2.

Turn ignition switch ON.

3.

Check signal between BOSE amp. harness connector and ground.

Is the inspection result normal?

YES

>> Replace AV control unit. Refer to 

AV-136, "Exploded View"

.

NO

>> Replace BOSE amp. Refer to 

AV-145, "Exploded View"

.

BOSE amp.

AV control unit

Continuity

Connector

Terminal

Connector

Terminal

B41

17

M206

128

Existed

BOSE amp.

Ground

Continuity

Connector

Terminal

B41

17

Not existed

(+)

(

−

)

Condition

Voltage

(Approx.)

BOSE amp.

Connector

Terminal

B41

17

Ground

Driver's Audio Stage ON

0 V

Driver's Audio Stage OFF

8.5 V