Nissan Quest E52. Manual - part 172

AV

U122E AV CONTROL UNIT

AV-567

< DTC/CIRCUIT DIAGNOSIS >

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U122E AV CONTROL UNIT

DTC Logic

INFOID:0000000009652352

DTC DETECTION LOGIC

DTC

Display contents of CON-

SULT

DTC detection condition

Possible malfunction factor

U122E

Built-in AUDIO CONN 
[U122E]

AV control unit malfunction is detected.

Replace the AV control unit if the malfunction 
occurs constantly.
Refer to 

AV-610, "Removal and Installation"

.

AV-568

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U1232 STEERING ANGLE SENSOR

U1232 STEERING ANGLE SENSOR

AV CONTROL UNIT

AV CONTROL UNIT : DTC Logic

INFOID:0000000009652353

AV CONTROL UNIT : Diagnosis Procedure

INFOID:0000000009652354

1.

ADJUST THE NEUTRAL POSITION OF THE STEERING ANGLE SENSOR

When U1232 is detected, adjust the neutral 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-49, "Work Procedure"

.

AROUND VIEW MONITOR CONTROL UNIT

AROUND VIEW MONITOR CONTROL UNIT : Diagnosis Procedure

INFOID:0000000009942958

1.

CHECK FUSE

Check for blown fuses.

Is inspection result normal?

YES

>> GO TO 2.

NO

>> Be sure to eliminate cause of malfunction before installing new fuse.

2.

CHECK POWER SUPPLY CIRCUITS

Check voltage between around view monitor control unit harness connector and ground.

Is inspection result normal?

YES

>> GO TO 3.

NO

>> Check harness between around view monitor control unit and fuse.

3.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect around view monitor control unit connector.

3.

Check continuity between around view monitor control unit harness connector and ground.

Is inspection result normal?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

DTC

Display contents of 

CONSULT

DTC detection condition

Possible malfunction factor

U1232

ST ANGLE SEN CALIB 
[1232]

Neutral position adjustment of the steering angle sensor 
is incomplete.

Adjust neutral position of the steering 
angle sensor.

Power source

Fuse No.

Battery

35

Signal name

Connector

Terminal

Ignition switch position

Value (Approx.)

Battery power supply

M253

2

OFF

Battery voltage

Signal name

Connector

Terminal

Ignition switch position

Continuity 

Ground

M253

1

OFF

Existed

AV

U1243 FRONT DISPLAY UNIT

AV-569

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U1243 FRONT DISPLAY UNIT

DTC Logic

INFOID:0000000009652356

Diagnosis Procedure

INFOID:0000000009652357

1.

CHECK FRONT DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT

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

AV-580, "AV CONTROL UNIT : Diagnosis

Procedure"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair malfunctioning parts.

2.

CHECK CONTINUITY COMMUNICATION CIRCUIT

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 the 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

DTC detection condition

Possible malfunction factor

U1243

FRONT DISP CONN
[U1243]

When either one of the following items are detected:
• front display unit power supply and ground circuits are 

malfunctioning.

• serial communication circuits between front display unit 

and AV control unit are malfunctioning.

• Front display unit power supply and 

ground circuits.

• Serial communication circuits be-

tween front display unit and AV 
control unit.

Front display unit

AV control unit

Continuity

Connector

Terminals

Connector

Terminals

M155

9

M180

89

Existed

10

73

Front display unit

Ground

Continuity

Connector

Terminals

M155

9

Not existed

10

AV-570

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U1243 FRONT DISPLAY UNIT

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace AV control unit. Refer to 

AV-610, "Removal and Installation"

.

4.

CHECK COMMUNICATION SIGNAL

Check signal between front display unit harness connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace front display unit. Refer to 

AV-611, "Removal and Installation"

.

Probe

Condition

Standard

Reference value

(+)

(

−

)

Front display unit

Connector

Terminal

Connector

Terminal

M155

9

M155

12

When ad-
justing dis-
play 
brightness.

Waveform of 1.5 V or 
less -  3.5 V or more is 
output.

PKIB5039J

Probe

Condition

Standard

Reference value

(+)

(

−

)

Front display unit

Connector

Terminal

Connector

Terminal

M155

10

M155

12

When ad-
justing dis-
play 
brightness.

Waveform of 1.5 V or 
less -  3.5 V or more is in-
put.

PKIB5039J