Infiniti EX35. Manual - part 72

AV

COMMUNICATION SIGNAL CIRCUIT (CONT-SAT)

AV-69

< COMPONENT DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

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COMMUNICATION SIGNAL CIRCUIT (CONT-SAT)

Description

INFOID:0000000003508414

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:0000000003508415

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-70

< COMPONENT DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

COMMUNICATION SIGNAL CIRCUIT (CONT-SAT)

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

REQUEST SIGNAL CIRCUIT (SAT

→

CONT)

AV-71

< COMPONENT DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

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REQUEST SIGNAL CIRCUIT (SAT

→

CONT)

Description

INFOID:0000000003508416

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

Diagnosis Procedure

INFOID:0000000003508417

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

AV-72

< COMPONENT DIAGNOSIS >

[BASE AUDIO WITHOUT NAVIGATION]

STEERING ANGLE SENSOR SIGNAL CIRCUIT

STEERING ANGLE SENSOR SIGNAL CIRCUIT

Description

INFOID:0000000003529087

• Steering angle sensor signal 1, 2 detects the turning direction and quantity of the steering and transmits it to

the camera control unit.

• Steering angle sensor signal 3 detects the neutral position of the steering and transmits it to the camera con-

trol unit.

• Camera control unit performs the correction of neutral position with sensor signal 1, 2, 3 and vehicle speed

signal.

Diagnosis Procedure

INFOID:0000000003529088

1.

CHECK CONTINUITY STEERING ANGLE SENSOR SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect camera control unit connector and steering angle sensor connector.

3.

Check continuity between camera control unit harness connector and steering angle sensor harness con-
nector.

4.

Check continuity between camera control unit harness connector and ground.

Is inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK VOLTAGE CAMERA CONTROL UNIT

1.

Connect camera control unit connector.

2.

Turn ignition switch ON.

3.

Check voltage between camera control unit harness connector and ground.

Is inspection result normal?

YES

>> GO TO 3.

NO

>> Replace camera control unit.

3.

CHECK STEERING ANGLE SENSOR SIGNAL

1.

Turn ignition switch OFF.

2.

Connect steering angle sensor connector.

Camera control unit

Steering angle sensor

Continuity

Connector

Terminals

Connector

Terminals

B50

23

M37

3

Existed

24

4

25

5

Camera control unit

Ground

Continuity

Connector

Terminals

B50

23

Not existed

24

25

(+)

(

−

)

Reference value

(Approx.)

Camera control unit

Connector

Terminals

B50

23

Ground

5.0 V

24

25