Infiniti EX35. Manual - part 115

AV

MODE CHANGE SIGNAL CIRCUIT

AV-241

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITHOUT NAVIGATION]

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MODE CHANGE SIGNAL CIRCUIT

Description

INFOID:0000000003508714

• 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:0000000003508715

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.

NO

>> Replace BOSE amp.

BOSE amp.

AV control unit

Continuity

Connector

Terminal

Connector

Terminal

B41

17

M82

27

Existed

BOSE amp.

Ground

Continuity

Connector

Terminal

B41

17

Not existed

(+)

(

−

)

Reference value

(Approx.)

BOSE amp.

Connector

Terminal

B41

17

Ground

8.5 V

AV-242

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITHOUT NAVIGATION]

COMMUNICATION SIGNAL CIRCUIT (CONT-SAT)

COMMUNICATION SIGNAL CIRCUIT (CONT-SAT)

Description

INFOID:0000000003544791

Satellite radio tuner and AV control unit are connected with a serial communication. They transmit the opera-
tion signal from AV control unit to satellite radio tuner, and transmit the display signal from satellite radio tuner
to AV control unit. 

Diagnosis Procedure

INFOID:0000000003544792

1.

CHECK CONTINUITY COMMUNICATION SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect satellite radio tuner connector and AV control unit connector.

3.

Check continuity between satellite radio tuner harness connector and AV control unit harness connector.

4.

Check continuity between satellite radio tuner harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK COMMUNICATION SIGNAL (SAT

→

CONT)

1.

Connect satellite radio tuner connector and AV control unit connector.

2.

Turn ignition switch ON.

3.

Check signal between satellite radio tuner harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace satellite radio tuner.

3.

CHECK COMMUNICATION SIGNAL (CONT

→

SAT)

Check signal between satellite radio tuner harness connector and ground.

Satellite radio tuner

AV control unit

Continuity

Connector

Terminals

Connector

Terminals

B236

9

M82

29

Existed

10

30

Satellite radio tuner

Ground

Continuity

Connector

Terminals

B236

9

Not existed

10

(+)

(

−

)

Condition

Reference value

Satellite radio tuner

Connector

Terminal

B236

9

Ground

When satellite radio mode is 
selected.

SKIA9300J

AV

COMMUNICATION SIGNAL CIRCUIT (CONT-SAT)

AV-243

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITHOUT NAVIGATION]

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Is the inspection result normal?

YES

>> Replace satellite radio tuner.

NO

>> Replace AV control unit.

(+)

(

−

)

Condition

Reference value

Satellite radio tuner

Connector

Terminal

B236

10

Ground

When satellite radio mode is 
selected.

SKIA9301J

AV-244

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITHOUT NAVIGATION]

REQUEST SIGNAL CIRCUIT (SAT

→

CONT)

REQUEST SIGNAL CIRCUIT (SAT

→

CONT)

Description

INFOID:0000000003544793

Request signal transmits the signal to recognize the connection of satellite radio tuner from satellite radio
tuner to AV control unit.

Diagnosis Procedure

INFOID:0000000003544794

1.

CHECK CONTINUITY REQUEST SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect satellite radio tuner connector and AV control unit connector.

3.

Check continuity between satellite radio tuner unit harness connector and AV control unit harness connec-
tor.

4.

Check continuity between satellite radio tuner harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK COMMUNICATION SIGNAL

1.

Connect satellite radio tuner connector and AV control unit connector.

2.

Turn ignition switch ON.

3.

Check signal between satellite radio tuner harness connector and ground.

Is the inspection result normal?

YES

>> Replace AV control unit.

NO

>> Replace satellite radio tuner.

Satellite radio tuner

AV control unit

Continuity

Connector

Terminal

Connector

Terminal

B236

8

M82

28

Existed

Satellite radio tuner

Ground

Continuity

Connector

Terminal

B236

8

Not existed

(+)

(

−

)

Condition

Reference value

Satellite radio tuner

Connector

Terminal

B236

8

Ground

When satellite radio mode is 
selected.

SKIA9299J