Infiniti FX35, FX50 (S51). Manual - part 80

 

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Infiniti FX35, FX50 (S51). Manual - part 80

 

 

AV

U1232 STEERING ANGLE SENSOR

AV-93

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT NAVIGATION]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

U1232 STEERING ANGLE SENSOR

DTC Logic

INFOID:0000000005528941

Diagnosis Procedure

INFOID:0000000005528942

1.

ADJUST THE PREDICTIVE COURSE LINE CENTER POSITION OF THE STEERING ANGLE SENSOR

When U1232 is detected, adjust the predictive course line center position of the steering angle sensor.

>> Adjusts the steering angle sensor neutral position on ABS actuator and electrical unit (control unit)

side. Refer to 

BRC-9, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION :

Special Repair Requirement"

.

DTC

Display contents of 

CONSULT-III

DTC detection condition

Possible malfunction factor

U1232

ST ANGLE SEN CALIB 
[1232]

Predictive course line center position adjustment of the 
steering angle sensor is incomplete.

Adjust the predictive course line cen-
ter position of the steering angle sen-
sor.

AV-94

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT NAVIGATION]

U1243 FRONT DISPLAY UNIT

U1243 FRONT DISPLAY UNIT

DTC Logic

INFOID:0000000005528943

Diagnosis Procedure

INFOID:0000000005528944

1.

CHECK FRONT DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUITS

Check front display unit power supply and ground circuits. Refer to 

AV-101, "FRONT DISPLAY UNIT : Diagno-

sis Procedure"

.

Is inspection result normal?

YES

>> GO TO 2.

NO

>> Repair malfunctioning parts.

2.

CHECK CONTINUITY COMMUNICATION CIRCUITS

1.

Turn ignition switch OFF.

2.

Disconnect front display unit connector and AV control unit connector.

3.

Check continuity between front display unit harness connector and AV control unit harness connector.

4.

Check continuity between front display unit harness connector and ground.

Is inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK COMMUNICATION SIGNAL

1.

Connect front display unit connector and AV control unit connector.

2.

Turn ignition switch ON.

3.

Check signal between front display unit harness connector and ground.

DTC

Display contents of 

CONSULT-III

DTC Detection Condition

Possible causes

U1243

FRONT DISP CONN
[U1243]

When either one of the following items is detected.

• front display unit power supply and ground circuit mal-

function is detected.

• malfunction is detected in communication circuits be-

tween front display unit and AV control unit.

• Front display unit power supply and 

ground circuit.

• Communication circuits between 

front display unit and AV control 
unit.

Front display unit

AV control unit

Continuity

Connector

Terminals

Connector

Terminals

M194

11

M202

70

Existed

22

71

Front display unit

Ground

Continuity

Connector

Terminals

M194

11

Not existed

12

AV

U1243 FRONT DISPLAY UNIT

AV-95

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT NAVIGATION]

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

M194

11

Ground

When adjusting display bright-
ness.

PKIB5039J

(+)

(

)

Condition

Reference value

Front display unit

Connector

Terminal

M194

22

Ground

When adjusting display bright-
ness.

PKIB5039J

AV-96

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT NAVIGATION]

U1255 SATELLITE RADIO TUNER

U1255 SATELLITE RADIO TUNER

DTC Logic

INFOID:0000000005528974

Diagnosis Procedure

INFOID:0000000005528975

1.

CHECK SATELLITE RADIO TUNER POWER SUPPLY AND GROUND CIRCUIT

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

AV-103, "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.

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.

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

M206

129

B236

8

Existed

130

9

122

10

AV control unit

Ground

Continuity

Connector

Terminals

M206

129

Not existed

130

122

(+)

(

)

Voltage

(Approx.)

AV control unit

Connector

Terminals

 

 

 

 

 

 

 

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