Nissan Pathfinder (2012 year). Manual — part 30

AV-58

< DTC/CIRCUIT DIAGNOSIS >

[MID AUDIO]

U1200 AV CONTROL UNIT

U1200 AV CONTROL UNIT

Description

INFOID:0000000007347619

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

AV-114, "Removal and Installation"

.

DTC Logic

INFOID:0000000007347620

Part name

Description

AV CONTROL UNIT

• 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.

• AV control unit includes audio function and vehicle information function.
• 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

DTC Detection Condition

Action to take

U1200

Control Unit
FLASH- ROM
[U1200]

An internal malfunction is detected in AV control unit
(FLASH-ROM).

Replace AV control unit. Re-
fer to

AV-114, "Removal and

Installation"

.

August 2012

2012 Pathfinder

AV

U1216 AV CONTROL UNIT

AV-59

< DTC/CIRCUIT DIAGNOSIS >

[MID AUDIO]

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U1216 AV CONTROL UNIT

Description

INFOID:0000000007347621

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

AV-114, "Removal and Installation"

.

DTC Logic

INFOID:0000000007347622

Part name

Description

AV CONTROL UNIT

• 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.

• AV control unit includes audio function and vehicle information function.
• 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

DTC Detection Condition

Action to take

U1216

CAN CONT
[U1216]

Internal malfunction of AV control unit (CAN controller) is
detected.

Replace AV control unit.
Refer to

AV-114, "Remov-

al and Installation"

.

August 2012

2012 Pathfinder

AV-60

< DTC/CIRCUIT DIAGNOSIS >

[MID AUDIO]

U1240 SWITCH CONN

U1240 SWITCH CONN

Description

INFOID:0000000007347623

U1240 is indicated when malfunction occurs in communication signal of multi AV system. Indicated simulta-

neously, without fail, with the malfunction of control units connected to AV control unit with communication line.

Determine the possible malfunction cause from the table below.

Self-diagnosis results display item

DTC

Display contents of

CONSULT

DTC Detection Condition

Possible causes

U1240

• SWITCH CONN

[U1240]

• A/C and AV switch assembly power supply and ground

circuit malfunction is detected

• A malfunction is detected in communication circuit be-

tween AV control unit and A/C and AV switch assembly

• A malfunction is detected in communication signal be-

tween AV control unit and A/C and AV switch assembly

• A/C and AV switch assembly power

supply and ground circuits

• Communication circuit between AV

control unit and A/C and AV switch
assembly

August 2012

2012 Pathfinder

AV

U1243 DISPLAY UNIT

AV-61

< DTC/CIRCUIT DIAGNOSIS >

[MID AUDIO]

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U1243 DISPLAY UNIT

Description

INFOID:0000000007347624

DTC Logic

INFOID:0000000007347625

Diagnosis Procedure

INFOID:0000000007347626

Regarding Wiring Diagram information, refer to

AV-95, "Wiring Diagram"

.

1.

CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT

Check display unit power supply and ground circuit. Refer to

AV-66, "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 M93

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

M133 (B) terminals 56, 44.

4. Check continuity between display unit harness connector M93

(A) terminals 11, 22 and ground.

Are continuity results as specified?

YES

>> GO TO 3

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

M93

11

M133

56

Yes

22

44

A

—

Continuity

Connector

Terminal

M93

11

Ground

No

22

ALNIA0310GB

August 2012

2012 Pathfinder

AV-62

< DTC/CIRCUIT DIAGNOSIS >

[MID AUDIO]

U1243 DISPLAY UNIT

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 M93 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-114, "Removal and Installation"

.

4.

CHECK COMMUNICATION SIGNAL

Check signal between display unit harness connector M93 terminal

22 and ground with an oscilloscope or CONSULT.

Are voltage readings as specified?

YES

>> Inspection End.

NO

>> Replace display unit. Refer to

AV-116, "Removal and Installation"

.

(+)

(-)

Reference signal

Connector

Terminal

M93

11

Ground

ALNIA0311GB

PKIB5039J

(+)

(-)

Reference signal

Connector

Terminal

M93

22

Ground

ALNIA0312GB

PKIB5039J

August 2012

2012 Pathfinder

AV

U1300 AV COMM CIRCUIT

AV-63

< DTC/CIRCUIT DIAGNOSIS >

[MID AUDIO]

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U1300 AV COMM CIRCUIT

Description

INFOID:0000000007347627

U1300 is indicated when malfunction occurs in communication signal of multi AV system. Indicated simulta-

neously, without fail, with the malfunction of control units connected to AV control unit with communication line.

Determine the possible malfunction cause from the table below.

Self-diagnosis results display item

DTC

Display contents of

CONSULT

DTC Detection Condition

Possible causes

U1300
U1240

• AV COMM CIRCUIT

[U1300]

• SWITCH CONN

[U1240]

• A/C and AV switch assembly power supply and ground

circuit malfunction is detected

• A malfunction is detected in communication circuit be-

tween AV control unit and A/C and AV switch assembly

• A malfunction is detected in communication signal be-

tween AV control unit and A/C and AV switch assembly

• A/C and AV switch assembly power

supply and ground circuits

• Communication circuit between AV

control unit and A/C and AV switch
assembly

August 2012

2012 Pathfinder

AV-64

< DTC/CIRCUIT DIAGNOSIS >

[MID AUDIO]

U1310 AV CONTROL UNIT

U1310 AV CONTROL UNIT

Description

INFOID:0000000007347628

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

AV-114, "Removal and Installation"

.

DTC Logic

INFOID:0000000007347629

Part name

Description

AV CONTROL UNIT

• 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.

• AV control unit includes audio function and vehicle information function.
• 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

DTC Detection Condition

Action to take

U1310

CONTROL UNIT (AV)
[U1310]

An initial diagnosis error is detected in AV communication
circuit.

Replace AV control unit. Refer to

AV-

114, "Removal and Installation"

.

August 2012

2012 Pathfinder

AV

POWER SUPPLY AND GROUND CIRCUIT

AV-65

< DTC/CIRCUIT DIAGNOSIS >

[MID AUDIO]

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POWER SUPPLY AND GROUND CIRCUIT

AV CONTROL UNIT
AV CONTROL UNIT : Diagnosis Procedure

INFOID:0000000007347630

Regarding Wiring Diagram information, refer to

AV-95, "Wiring Diagram"

.

1.

CHECK FUSES

Check that the following fuses of the AV control unit are not are not blown.

Are the fuses OK?

YES

>> GO TO 2

NO

>> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.

2.

POWER SUPPLY CIRCUIT CHECK

1. Disconnect AV control unit connectors M131 and M135.

2. Check voltage between the AV control unit connectors M131

and M135 and ground.

Are the voltage results as specified?

YES

>> GO TO 3

NO

>> • Check connector housings for disconnected or loose

terminals.

• Repair harness or connector.

3.

GROUND CIRCUIT CHECK

1. Turn ignition switch OFF.

2. Check continuity between AV control unit harness connectors M131, M133, M134, M135 and ground.

Unit

Terminals

Signal name

Fuse No.

AV control unit

19

Battery power

29

7

Ignition switch ACC or ON

4

104

Ignition switch ON or START

12

(+)

(-)

OFF

ACC

ON

Connector

Terminal

M131

7

Ground

0V

Battery
voltage

Battery
voltage

19

Ground

Battery
voltage

Battery
voltage

Battery
voltage

M135

104

Ground

0V

0V

Battery
voltage

ALNIA0875GB

August 2012

2012 Pathfinder