Infiniti FX35, FX50 (S51). Manual - part 126

AV

U1243 FRONT DISPLAY UNIT

AV-277

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION (SINGLE MONITOR)]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

Is inspection result normal?

YES

>> GO TO 4.

NO

>> Replace AV control unit.

4.

CHECK COMMUNICATION SIGNAL

Check signal between front display unit harness connector and ground.

Is inspection result normal?

YES

>> INSPECTION END

NO

>> Replace front display unit.

(+)

(

−

)

Condition

Reference value

Front display unit

Connector

Terminal

M195

9

Ground

When adjusting display bright-
ness.

PKIB5039J

(+)

(

−

)

Condition

Reference value

Front display unit

Connector

Terminal

M195

10

Ground

When adjusting display bright-
ness.

PKIB5039J

AV-278

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION (SINGLE MONITOR)]

U1244 GPS ANTENNA

U1244 GPS ANTENNA

DTC Logic

INFOID:0000000005475748

Diagnosis Procedure

INFOID:0000000005475749

1.

GPS ANTENNA CHECK

Visually check GPS antenna and antenna feeder.

Is inspection result normal?

YES

>> GO TO 2.

NO

>> Repair malfunctioning parts.

2.

CHECK AV CONTROL UNIT VOLTAGE 

1.

Disconnect GPS antenna connector.

2.

Turn ignition switch ON.

3.

Check voltage between AV control unit terminal and ground.

Is inspection result normal?

YES

>> INSPECTION END

NO

>> Replace AV control unit.

DTC

Display contents of 

CONSULT-III

DTC Detection Condition

Possible causes

U1244

GPS ANTENNA CONN
[U1244]

GPS antenna connection malfunction is detected.

GPS antenna disconnection

(+)

(

−

)

Voltage

(Approx.)

AV control unit

Terminal

153

Ground

5.0 V

AV

U1258 SATELLITE RADIO ANTENNA

AV-279

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION (SINGLE MONITOR)]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

U1258 SATELLITE RADIO ANTENNA

DTC Logic

INFOID:0000000005475754

Diagnosis Procedure

INFOID:0000000005475755

1.

SATELLITE RADIO ANTENNA CHECK

Visually check satellite radio antenna and antenna feeder.

Is inspection result normal?

YES

>> GO TO 2.

NO

>> Repair malfunctioning parts.

2.

CHECK AV CONTROL UNIT VOLTAGE 

1.

Disconnect satellite radio antenna connector.

2.

Turn ignition switch ON.

3.

Check voltage between AV control unit terminal and ground.

Is inspection result normal?

YES

>> INSPECTION END

NO

>> Replace AV control unit.

DTC

Display contents of 

CONSULT-III

DTC Detection Condition

Possible causes

U1258

XM ANTENNA CONN
[U1258]

Satellite radio antenna connection malfunction is detect-
ed.

Satellite radio antenna disconnection

(+)

(

−

)

Voltage

(Approx.)

AV control unit

Terminal

159

Ground

4.0 V

AV-280

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION (SINGLE MONITOR)]

U1263 USB

U1263 USB

DTC Logic

INFOID:0000000005475757

Diagnosis Procedure

INFOID:0000000005475758

1.

CHECK USB HARNESS

Visually check USB harness.

Is the inspection result normal?

YES

>> Replace AV control unit. Refer to 

AV-333, "Exploded View"

.

NO

>> Replace USB harness.

DTC

Display contents of 

CONSULT-III

DTC detection condition

Possible malfunction factor

U1263

USB OVERCURRENT
[U1263]

Detection of overcurrent in USB connector.

Check USB harness between the AV 
control unit and USB connector.