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Nissan Pathfinder (2010 year). Manual - part 69

U121C AV CONTROL UNIT

AV-359

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U121C AV CONTROL UNIT

Description

INFOID:0000000005259551

Replace the AV control unit if this DTC is displayed. Refer to

AV-460, "Removal and Installation"

DTC Logic

INFOID:0000000005259552

Part name

Description

AV CONTROL UNIT

• Integrates HDD (hard disk drive) allowing map data and music data to be

stored.

• It is the master unit of the MULTI AV system, and it is connected to each control

unit by means of communication. It operates each system according to com-
munication signals from the AV control unit.

• The AV control unit includes the audio, hands-free phone, voice control, navi-

gation, and vehicle information functions.

• It is connected to ECM and combination meter via CAN communication to ob-

tain necessary information for the vehicle information function.

• It inputs the automatic brightness ON/OFF signals that are required for the dis-

play dimming control.

• It inputs the signals for driving status recognition (vehicle speed, reverse and

parking brake).

DTC

Display contents of

CONSULT-III

DTC Detection Condition

Action to take

U121C

HDD-ACCESS
[U121C]

Internal malfunction of AV control unit (HDD access error)
is detected.

Replace AV control unit. Refer to

AV-

460, "Removal and Installation"

2010 Pathfinder

AV-360

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U121D AV CONTROL UNIT

U121D AV CONTROL UNIT

Description

INFOID:0000000005259553

Replace the AV control unit if this DTC is displayed. Refer to

AV-460, "Removal and Installation"

DTC Logic

INFOID:0000000005259554

Part name

Description

AV CONTROL UNIT

• Integrates HDD (hard disk drive) allowing map data and music data to be

stored.

• It is the master unit of the MULTI AV system, and it is connected to each control

unit by means of communication. It operates each system according to com-
munication signals from the AV control unit.

• The AV control unit includes the audio, hands-free phone, voice control, navi-

gation, and vehicle information functions.

• It is connected to ECM and combination meter via CAN communication to ob-

tain necessary information for the vehicle information function.

• It inputs the automatic brightness ON/OFF signals that are required for the dis-

play dimming control.

• It inputs the signals for driving status recognition (vehicle speed, reverse and

parking brake).

DTC

Display contents of

CONSULT-III

DTC Detection Condition

Action to take

U121D

DSP CONN
[U121D]

Internal malfunction of AV control unit (DSP connection
error) is detected.

Replace AV control unit. Refer to

AV-

460, "Removal and Installation"

2010 Pathfinder

U121E AV CONTROL UNIT

AV-361

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U121E AV CONTROL UNIT

Description

INFOID:0000000005259555

Replace the AV control unit if this DTC is displayed. Refer to

AV-460, "Removal and Installation"

DTC Logic

INFOID:0000000005259556

Part name

Description

AV CONTROL UNIT

• Integrates HDD (hard disk drive) allowing map data and music data to be

stored.

• It is the master unit of the MULTI AV system, and it is connected to each control

unit by means of communication. It operates each system according to com-
munication signals from the AV control unit.

• The AV control unit includes the audio, hands-free phone, voice control, navi-

gation, and vehicle information functions.

• It is connected to ECM and combination meter via CAN communication to ob-

tain necessary information for the vehicle information function.

• It inputs the automatic brightness ON/OFF signals that are required for the dis-

play dimming control.

• It inputs the signals for driving status recognition (vehicle speed, reverse and

parking brake).

DTC

Display contents of

CONSULT-III

DTC Detection Condition

Action to take

U121E

DSP COMM
[U121E]

Internal malfunction of AV control unit (DSP communica-
tion error) is detected.

Replace AV control unit. Refer to

AV-

460, "Removal and Installation"

2010 Pathfinder

AV-362

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U121F AV CONTROL UNIT

U121F AV CONTROL UNIT

Description

INFOID:0000000005259557

DTC Logic

INFOID:0000000005259558

Diagnosis Procedure

INFOID:0000000005259559

CHECK AV CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT

Check audio control unit power supply and ground circuit. Refer to

AV-371, "AV CONTROL UNIT : Diagnosis

Procedure"

Is inspection result OK?

YES

>> Inspection End.

>> Repair malfunctioning parts.

Part name

Description

AV CONTROL UNIT

• Integrates HDD (hard disk drive) allowing map data and music data to be

stored.

• It is the master unit of the MULTI AV system, and it is connected to each control

unit by means of communication. It operates each system according to com-
munication signals from the AV control unit.

• The AV control unit includes the audio, hands-free phone, voice control, navi-

gation, and vehicle information functions.

• It is connected to ECM and combination meter via CAN communication to ob-

tain necessary information for the vehicle information function.

• It inputs the automatic brightness ON/OFF signals that are required for the dis-

play dimming control.

• It inputs the signals for driving status recognition (vehicle speed, reverse and

parking brake).

DTC

Display contents of

CONSULT-III

DTC Detection Condition

Action to take

U121F

INTERNAL COMM
[U121F]

Internal malfunction of AV control unit (internal communi-
cation error) is detected.

AV control unit power supply and
ground circuit

2010 Pathfinder

U1243 DISPLAY UNIT

AV-363

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U1243 DISPLAY UNIT

Description

INFOID:0000000005259560

DTC Logic

INFOID:0000000005259561

Diagnosis Procedure

INFOID:0000000005259562

Regarding Wiring Diagram information, refer to

AV-414, "Wiring Diagram"

CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT

Check display unit power supply and ground circuit. Refer to

AV-372, "DISPLAY UNIT : Diagnosis Procedure"

Is inspection result OK?

YES

>> GO TO 2

>> Repair malfunctioning parts.

CHECK CONTINUITY COMMUNICATION CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect display unit connector M92 and AV control unit connector M37.

3. Check continuity between display unit harness connector M92

(A) terminals 11, 22 and AV control unit harness connector M37

(B) terminals 30, 31.

4. Check continuity between display unit harness connector M92

(A) terminals 11, 22 and ground.

Part name

Description

DISPLAY UNIT

• Display image is controlled by the serial communication from AV control unit.
• RGB image signal is input from AV control unit (RGB, RGB area and RGB syn-

chronizing). Auxiliary image signal is input from the auxiliary input jack. Cam-
era image signal is input from the camera control unit.

• Synchronize signal (HP, VP) is output to AV control unit.
• Touch panel function can be operated for each system by touching a display

directly.

DTC

Display contents of

CONSULT-III

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

Continuity

Connector

Terminal

Connector

Terminal

M92

M37

Yes

—

Continuity

Connector

Terminal

M92

Ground

AWNIA1787ZZ

2010 Pathfinder

AV-364

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U1243 DISPLAY UNIT

Are continuity results as specified?

YES

>> GO TO 3

>> Repair harness or connector.

CHECK COMMUNICATION SIGNAL

1. Connect display unit connector M92 and AV control unit connec-

tor M37.

2. Turn ignition switch ON.

3. Check signal between display unit harness connector M92 ter-

minal 11 and ground.

Are voltage readings as specified?

YES

>> GO TO 4

>> Replace AV control unit. Refer to

AV-460, "Removal and Installation"

CHECK COMMUNICATION SIGNAL

Check signal between display unit harness connector M92 terminal

22 and ground.

Are voltage readings as specified?

YES

>> Inspection End.

>> Replace display unit. Refer to

AV-462, "Removal and Installation"

Connector

Terminals

Reference Signal

(+)

(-)

M92

Ground

ALNIA0398GB

PKIB5039J

Connector

Terminals

Reference Signal

(+)

(-)

M92

Ground

ALNIA0399GB

PKIB5039J

2010 Pathfinder

U1244 GPS ANTENNA

AV-365

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U1244 GPS ANTENNA

Description

INFOID:0000000005259563

The GPS antenna receives satellite GPS signals.

DTC Logic

INFOID:0000000005259564

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000005259565

Regarding Wiring Diagram information, refer to

AV-414, "Wiring Diagram"

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

>> Repair or replace malfunctioning parts.

CHECK AV CONTROL UNIT VOLTAGE

1. Turn ignition switch ON.

2. Check voltage between AV control unit connector M72 terminal

109 and ground.

Is the voltage reading as specified?

YES

>> Replace GPS antenna. Refer to

AV-473, "Removal and

Installation"

>> Replace AV control unit. Refer to

AV-460, "Removal and

Installation"

DTC

CONSULT-III display

Detection condition

U1244

GPS ANTENNA CONN
[U1244]

GPS antenna connection malfunction is detected.

109 - Ground

: Approx. 5V

ALNIA0541GB

2010 Pathfinder

AV-366

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U1250 CAMERA CONTROL UNIT

U1250 CAMERA CONTROL UNIT

Description

INFOID:0000000005259566

DTC Logic

INFOID:0000000005259567

Diagnosis Procedure

INFOID:0000000005259568

Regarding Wiring Diagram information, refer to

AV-414, "Wiring Diagram"

CHECK CAMERA-CONNECTION RECOGNITION SIGNAL CIRCUIT

1. Disconnect AV control unit connector and camera control unit

connector.

2. Check continuity between AV control unit harness connector

M48 (A) terminal 87 and camera control unit harness connector

B176 (B) terminal 5.

3. Check continuity between AV control unit harness connector

M48 (A) terminal 87 and ground.

Are the continuity results as specified?

YES

>> GO TO 2

>> Repair harness or connector.

CHECK AV CONTROL UNIT VOLTAGE

Part name

Description

CAMERA CONTROL UNIT

• Camera image signal is input from rear view camera, and camera image is in-

dicated on the display.

• Power (camera ON signal) is sent to rear view camera.
• Controlled by audio communication sent from AV control unit.
• AV control unit recognizes the presence of camera system with camera con-

nection recognition signal.

DTC

Display contents of

CONSULT-III

DTC Detection Condition

Possible causes

U1250

CAMERA CONT. CONN
[U1250]

A malfunction is detected in camera-connection recogni-
tion signal circuit

Camera-connection recognition sig-
nal circuit

Continuity

Connector

Terminal

Connector

Terminal

M48

B176

Yes

—

Continuity

Connector

Terminal

M48

Ground

ALNIA0542GB

2010 Pathfinder

Content .. 67 68 69 70 ..