Nissan Maxima. Manual - part 186

AV-564

< DTC/CIRCUIT DIAGNOSIS >

[COLOR DISPLAY - W/BOSE & NAVI]

U1232 STEERING ANGLE SENSOR

U1232 STEERING ANGLE SENSOR

DTC Logic

INFOID:0000000009471478

Diagnosis Procedure

INFOID:0000000009471479

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-565

< DTC/CIRCUIT DIAGNOSIS >

[COLOR DISPLAY - W/BOSE & NAVI]

C

D

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F

G

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A

O

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U1243 DISPLAY UNIT

DTC Logic

INFOID:0000000009471480

Diagnosis Procedure

INFOID:0000000009471481

Regarding Wiring Diagram information, refer to 

AV-614, "Wiring Diagram - With BOSE audio system With Nav-

igation System"

.

1.

CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT

Check display unit power supply and ground circuit. Refer to 

AV-572, "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 M142 and AV control unit connector M163.

3. Check continuity between display unit harness connector M142

(A) terminals 9, 10 and AV control unit harness connector M163

(B) terminals 45 and 61.

4. Check continuity between display unit harness connector M142

(A) terminals 9, 10 and ground.

Are continuity results as specified?

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.

DTC

Display contents of 

CONSULT

DTC detection condition

Possible malfunction factor

U1243

FRONT DISP CONN
[U1243]

When either one of the following items are detected:
• display unit power supply and ground circuit malfunc-

tion is detected.

• communication circuit between AV control unit and dis-

play unit.

• Display unit power supply and 

ground circuit.

• Communication circuit between AV 

control unit and display unit.

A

B

Continuity

Connector

Terminal

Connector

Terminal

M142

9

M163

61

Yes

10

45

A

—

Continuity

Connector

Terminal

M142

9

Ground

No

10

AWNIA1935GB

AV-566

< DTC/CIRCUIT DIAGNOSIS >

[COLOR DISPLAY - W/BOSE & NAVI]

U1243 DISPLAY UNIT

3. Check signal between display unit harness connector M142 ter-

minal 9 and ground with an oscilloscope or CONSULT.

Are voltage readings as specified?

YES

>> GO TO 4.

NO

>> Replace AV control unit. Refer to 

AV-652, "Removal and Installation"

.

4.

CHECK COMMUNICATION SIGNAL

Check signal between display unit harness connector M142 terminal

10 and ground with an oscilloscope or CONSULT.

Are voltage readings as specified?

YES

>> Inspection End.

NO

>> Replace display unit. Refer to  

AV-655, "Removal and Installation"

.

(+)

(-)

Reference signal

Connector

Terminal

M142

9

Ground

AWNIA1936GB

PKIB5039J

(+)

(-)

Reference signal

Connector

Terminal

M142

10

Ground

AWNIA1937GB

PKIB5039J

AV

U1244 GPS ANTENNA

AV-567

< DTC/CIRCUIT DIAGNOSIS >

[COLOR DISPLAY - W/BOSE & NAVI]

C

D

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J

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B

A

O

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U1244 GPS ANTENNA

DTC Logic

INFOID:0000000009471482

Diagnosis Procedure

INFOID:0000000009471483

Regarding Wiring Diagram information, refer to 

AV-614, "Wiring Diagram - With BOSE audio system With Nav-

igation System"

.

1.

GPS ANTENNA CHECK

Inspect GPS antenna and antenna feeder for damage or poor connection.
Is the GPS antenna and feeder clean and undamaged?

YES

>> GO TO 2.

NO

>> Repair or replace malfunctioning parts.

2.

CHECK AV CONTROL UNIT VOLTAGE 

1. Turn ignition switch ON.

2. Check voltage between AV control unit connector M165 terminal

105 and ground.

Is the voltage reading as specified?

YES

>> Replace GPS antenna. Refer to 

AV-666, "Removal and

Installation"

.

NO

>> Replace AV control unit. Refer to 

AV-652, "Removal and Installation"

.

DTC

Display contents of 

CONSULT

DTC detection condition

Possible malfunction factor

U1244

GPS ANTENNA CONN
[U1244]

GPS antenna connection malfunction is detected.

Check the connection of the GPS an-
tenna connector.

(+)

(-)

Voltage (Approx.)

Connector

Terminal

M165

105

Ground

5V

AWNIA1763ZZ