Nissan Maxima. Manual - part 140

AV-380

< DTC/CIRCUIT DIAGNOSIS >

[COLOR DISPLAY - W/ BOSE]

U1232 STEERING ANGLE SENSOR

U1232 STEERING ANGLE SENSOR

DTC Logic

INFOID:0000000009471329

Diagnosis Procedure

INFOID:0000000009471330

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-6, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION :

Special Repair Requirement"

.

DTC

Display contents of 

CONSULT

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

U1243 DISPLAY UNIT

AV-381

< DTC/CIRCUIT DIAGNOSIS >

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U1243 DISPLAY UNIT

Description

INFOID:0000000009471331

DTC Logic

INFOID:0000000009471332

Diagnosis Procedure

INFOID:0000000009471333

Regarding Wiring Diagram information, refer to 

AV-449, "Wiring Diagram - With BOSE Audio system Without

Navigation System"

.

1.

CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT

Check display unit power supply and ground circuit. Refer to 

AV-389, "DISPLAY UNIT : Diagnosis Procedure"

.

Is inspection result OK?

YES

>> GO TO 2.

NO

>> Repair malfunctioning parts.

2.

CHECK CONTINUITY OF COMMUNICATION CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect display unit connector and AV control unit connector.

3. Check continuity between display unit harness connector M141

(A) terminals 11, 22 and AV control unit harness connector

M154 (B) terminals 56, 44.

4. Check continuity between display unit harness connector M141

(A) terminals 11, 22 and ground.

Are continuity results as specified?

Part name

Description

DISPLAY UNIT

• Display image is controlled by the serial communication from AV control unit.
• Inputs the RGB image signal (RGB, RGB area and RGB synchronizing) from 

AV control unit and the auxiliary image signal from the auxiliary input jacks.

• Outputs the synchronizing signals (HP and VP) to the AV control unit.

DTC

Display contents of 

CONSULT

DTC Detection Condition

Possible causes

U1243

FRONT DISP CONN
[U1243]

• Display unit power supply and ground circuit malfunc-

tion is detected.

• Malfunction is detected on communication circuit be-

tween display unit and AV control unit.

• Malfunction is detected on communication signal be-

tween display unit and AV control unit.

• Display unit power supply and 

ground circuit.

• Communication circuit between 

display unit and AV control unit.

A

B

Continuity

Connector

Terminal

Connector

Terminal

M141

11

M154

56

Yes

22

44

A

—

Continuity

Connector

Terminal

M141

11

Ground

No

22

ALNIA0310GB

AV-382

< DTC/CIRCUIT DIAGNOSIS >

[COLOR DISPLAY - W/ BOSE]

U1243 DISPLAY UNIT

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK COMMUNICATION SIGNAL

1. Connect display unit connector and AV control unit connector.

2. Turn ignition switch ON.

3. Check signal between display unit harness connector M141 ter-

minal 11 and ground with an oscilloscope or CONSULT.

Are voltage readings as specified?

YES

>> GO TO 4.

NO

>> Replace AV control unit. Refer to 

AV-481, "Removal and Installation"

.

4.

CHECK COMMUNICATION SIGNAL

Check signal between display unit harness connector M141 terminal

22 and ground with an oscilloscope or CONSULT.

Are voltage readings as specified?

YES

>> Inspection End.

NO

>> Replace display unit. Refer to  

AV-484, "Removal and Installation"

.

(+)

(-)

Reference signal

Connector

Terminal

M141

11

Ground

ALNIA0311GB

PKIB5039J

(+)

(-)

Reference signal

Connector

Terminal

M141

22

Ground

ALNIA0312GB

PKIB5039J

AV

U1263 USB

AV-383

< DTC/CIRCUIT DIAGNOSIS >

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U1263 USB

DTC Logic

INFOID:0000000009471334

Diagnosis Procedure

INFOID:0000000009471335

1.

CHECK USB HARNESS

Visually check USB harness.
Is the inspection result normal?

YES

>> Replace AV control unit. Refer to 

AV-481, "Removal and Installation"

.

NO

>> Replace USB harness.

DTC

Display contents of 

CONSULT

DTC detection condition

Possible malfunction factor

U1263

USB OVERCURRENT
[U1263]

Detection of over current in USB interface.

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