Infiniti EX35. Manual - part 108

AV

U1243 DISPLAY UNIT

AV-213

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITHOUT NAVIGATION]

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G

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Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace AV control unit.

4.

CHECK COMMUNICATION SIGNAL (DISP

→

CONT)

Check signal between display unit harness connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace display unit.

(+)

(

−

)

Condition

Reference value

Display unit

Connector

Terminal

M71

11

Ground

When adjusting display 
brightness.

PKIB5039J

(+)

(

−

)

Condition

Reference value

Display unit

Connector

Terminal

M71

22

Ground

When adjusting display 
brightness.

PKIB5039J

AV-214

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITHOUT NAVIGATION]

U1250 CAMERA CONTROL UNIT

U1250 CAMERA CONTROL UNIT

Description

INFOID:0000000003544756

DTC Logic

INFOID:0000000003544757

Diagnosis Procedure

INFOID:0000000003544758

1.

CHECK CAMERA-CONNECTION RECOGNITION SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect AV control unit connector and camera control unit connector.

3.

Check continuity between AV control unit harness connector and camera control unit harness connector.

Is inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK AV CONTROL UNIT VOLTAGE

1.

Connect AV control unit connector.

2.

Turn ignition switch ON.

3.

Check voltage between AV control unit harness connector and ground.

Is inspection result normal?

YES

>> Replace camera control unit.

NO

>> Replace AV control unit.

Part name

Description

CAMERA CONTROL UNIT

• Camera image signal is input from rear view camera, and camera image is in-

dicated on the display.

• Power (camera ON signal) is sent to rear view camera.
• Controlled by AV communication sent from AV control unit.
• AV control unit recognizes the presence of camera system with camera con-

nection recognition signal.

DTC

Display contents of 

CONSULT-III

DTC Detection Condition

Possible causes

U1250

CAMERA CONT. CONN
[U1250]

A malfunction is detected in Camera-connection recogni-
tion signal circuit

Camera-connection recognition sig-
nal circuit

AV control unit

Camera control unit

Continuity

Connector

Terminal

Connector

Terminal

M84

68

B50

14

Existed

(+)

(

−

)

Voltage

(Approx.)

AV control unit

Connector

Terminal

M84

68

Ground

5.0 V

AV

U1255 SATELLITE RADIO TUNER

AV-215

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITHOUT NAVIGATION]

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U1255 SATELLITE RADIO TUNER

Description

INFOID:0000000003544759

DTC Logic

INFOID:0000000003544760

Diagnosis Procedure

INFOID:0000000003544761

1.

CHECK SATELLITE RADIO TUNER POWER SUPPLY AND GROUND CIRCUIT

Check satellite radio tuner power supply and ground circuit. Refer to 

AV-221, "SATELLITE RADIO TUNER :

Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair malfunctioning parts.

2.

CHECK CONTINUITY COMMUNICATION CIRCUIT AND REQUEST SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect AV control unit connector and satellite radio tuner connector.

3.

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

4.

Check continuity between AV control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

Part name

Description

SATELLITE RADIO TUNER

• Inputs the satellite radio signal from satellite radio antenna and outputs it to the 

AV control unit.

• It is controlled with the communication (communication signal, request signal) 

from AV control unit.

DTC

Display contents of 

CONSULT-III

DTC Detection Condition

Possible causes

U1255

SAT CONN
[U1255]

When either one of the following items is detected:

• Satellite radio tuner power supply and ground circuits 

malfunction is detected.

• Malfunction is detected in communication circuits be-

tween AV control unit and satellite radio tuner.

• Malfunction is detected in request signal circuit be-

tween AV control unit and satellite radio tuner.

• Satellite radio tuner power supply 

and ground circuits.

• Communication circuits between 

AV control unit and satellite radio 
tuner.

• Request signal circuit between AV 

control unit and satellite radio tun-
er.

AV control unit

Satellite radio tuner

Continuity

Connector

Terminals

Connector

Terminals

M82

28

B236

8

Existed

29

9

30

10

AV control unit

Ground

Continuity

Connector

Terminals

M82

28

Not existed

29

30

AV-216

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITHOUT NAVIGATION]

U1255 SATELLITE RADIO TUNER

3.

CHECK AV CONTROL UNIT VOLTAGE

1.

Connect AV control unit connector.

2.

Turn ignition switch ON.

3.

Check voltage between AV control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace AV control unit.

4.

CHECK SATELLITE RADIO TUNER

1.

Turn ignition switch OFF.

2.

Disconnect AV control unit connector.

3.

Connect satellite radio tuner.

4.

Turn ignition switch ON.

5.

Check voltage between satellite radio tuner harness connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace satellite radio tuner.

(+)

(

−

)

Voltage

(Approx.)

AV control unit

Connector

Terminals

M82

28

Ground

7.5 V

29

7.0 V

(+)

(

−

)

Voltage

(Approx.)

Satellite radio tuner

Connector

Terminal

M236

10

Ground

7.0 V