Nissan Quest E52. Manual - part 88

AV

MICROPHONE SIGNAL CIRCUIT

AV-231

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[BASE AUDIO WITH SEPARATE DISPLAY]

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MICROPHONE SIGNAL CIRCUIT

Description

INFOID:0000000009652070

TEL adapter unit supplies power to microphone. The microphone transmits the sound voice to the TEL
adapter unit.

Diagnosis Procedure

INFOID:0000000009652071

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-261, "Removal and Installation"

.

3.

CHECK MICROPHONE SIGNAL 

1.

Connect microphone connector.

2.

Check signal between TEL adapter unit harness connector.

TEL adapter unit

Microphone

Continuity

Connector

Terminals

Connector

Terminals

M138

7

R20

1

Existed

8

2

29

4

TEL adapter unit

Ground

Continuity

Connector

Terminals

M138

29

Not existed

7

Probe

Standard

Voltage

(Approx.)

(+)

(

−

)

TEL adapter unit

Connector

Terminal

Connector

Terminal

M138

29

M138

8

4.7 - 5.3 V

5.0 V

AV-232

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MICROPHONE SIGNAL CIRCUIT

Is the inspection result normal?

YES

>> Replace TEL adapter unit. Refer to 

AV-261, "Removal and Installation"

.

NO

>> Replace microphone. Refer to 

AV-263, "Removal and Installation"

.

Probe

Condition

Standard

Reference value

(+)

(+)

TEL adapter unit

Connector

Terminal

Connector

Terminal

M138

7

M138

8

Give  a  voice.

Waveform according to 
voice is input.

PKIB5037J

AV

CONTROL SIGNAL CIRCUIT

AV-233

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CONTROL SIGNAL CIRCUIT

Description

INFOID:0000000009652072

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

Diagnosis Procedure

INFOID:0000000009652073

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. Refer to 

AV-261, "Removal and Installation"

.

NO

>> Repair harness or connector.

TEL adapter unit

Ground

Standard

Reference value

(Approx.)

Connector

Terminals

M138

20

3.1 V or less

0 V

27

AV-234

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STEERING SWITCH SIGNAL A CIRCUIT

STEERING SWITCH SIGNAL A CIRCUIT

Description

INFOID:0000000009652074

Transmits the steering switch signal to AV control unit.

Diagnosis Procedure

INFOID:0000000009652075

1.

CHECK STEERING SWITCH SIGNAL A CIRCUIT

1.

Disconnect AV control unit connector and spiral cable connector. 

2.

Check continuity between AV control unit harness connector and spiral cable harness connector.

3.

Check continuity between AV control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK SPIRAL CABLE

Check spiral cable.
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace spiral cable. Refer to 

SR-15, "Removal and Installation"

.

3.

CHECK AV CONTROL UNIT VOLTAGE

1.

Connect AV control unit connector and spiral cable connector.

2.

Turn ignition switch ON.

3.

Check voltage between AV control unit harness connector.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace AV control unit. Refer to 

AV-250, "Removal and Installation"

.

4.

CHECK STEERING SWITCH

1.

Turn ignition switch OFF.

2.

Check steering switch. Refer to 

AV-234, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace steering wheel. Refer to 

ST-12, "Removal and Installation"

.

Component Inspection

INFOID:0000000009652076

Measure the resistance between the steering switch connector terminals 14 to 17 and 15 to 17.

AV control unit

Spiral cable

Continuity

Connector

Terminal

Connector

Terminal

M171

6

M33

24

Existed

AV control unit

Ground

Continuity

Connector

Terminal

M171

6

Not existed

Probe

Standard

Voltage

(Approx.)

(+)

(

−

)

AV control unit

Connector

Terminal

Connector

Terminal

M171

6

M171

15

0 - 3.3 V

3.3 V