Nissan Murano Z51 (2008 year). Manual - part 52

AV

U121C AV CONTROL UNIT

AV-605

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

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U121C AV CONTROL UNIT

Description

INFOID:0000000003356592

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

AV-764, "Exploded View"

.

DTC Logic

INFOID:0000000003356593

Part name

Description

AV CONTROL UNIT

• Integrates hard disk drive (HDD) 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 communication. It operates each system according to communication 
signals from the AV control unit.

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

gation, satellite radio, and vehicle information functions.

• It is connected to ECM, A/C auto amp. and combination meter via CAN com-

munication to obtain necessary information for the vehicle information function.

• It is connected to BCM via CAN communication transmitting/receiving for the 

vehicle settings function.

• It inputs the illumination signals that are required for the display dimming con-

trol.

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

parking brake). 

• Update of map data is performed with the CONSULT-III and the applicable ca-

ble.

• It includes the TEL adapter and Bluetooth

™

 function.

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.

Revision: 2008 October

2009 Murano

AV-606

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U121D AV CONTROL UNIT

U121D AV CONTROL UNIT

Description

INFOID:0000000003356594

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

AV-764, "Exploded View"

.

DTC Logic

INFOID:0000000003356595

Part name

Description

AV CONTROL UNIT

• Integrates hard disk drive (HDD) 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 communication. It operates each system according to communication 
signals from the AV control unit.

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

gation, satellite radio, and vehicle information functions.

• It is connected to ECM, A/C auto amp. and combination meter via CAN com-

munication to obtain necessary information for the vehicle information function.

• It is connected to BCM via CAN communication transmitting/receiving for the 

vehicle settings function.

• It inputs the illumination signals that are required for the display dimming con-

trol.

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

parking brake). 

• Update of map data is performed with the CONSULT-III and the applicable ca-

ble.

• It includes the TEL adapter and Bluetooth

™

 function.

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.

Revision: 2008 October

2009 Murano

AV

U121E AV CONTROL UNIT

AV-607

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

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U121E AV CONTROL UNIT

Description

INFOID:0000000003356596

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

AV-764, "Exploded View"

.

DTC Logic

INFOID:0000000003356597

Part name

Description

AV CONTROL UNIT

• Integrates hard disk drive (HDD) 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 communication. It operates each system according to communication 
signals from the AV control unit.

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

gation, satellite radio, and vehicle information functions.

• It is connected to ECM, A/C auto amp. and combination meter via CAN com-

munication to obtain necessary information for the vehicle information function.

• It is connected to BCM via CAN communication transmitting/receiving for the 

vehicle settings function.

• It inputs the illumination signals that are required for the display dimming con-

trol.

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

parking brake). 

• Update of map data is performed with the CONSULT-III and the applicable ca-

ble.

• It includes the TEL adapter and Bluetooth

™

 function.

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.

Revision: 2008 October

2009 Murano

AV-608

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U121F AV CONTROL UNIT

U121F AV CONTROL UNIT

Description

INFOID:0000000003356598

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

AV-764, "Exploded View"

.

DTC Logic

INFOID:0000000003356599

Diagnosis Procedure

INFOID:0000000003356600

1.

CHECK AV CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT

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

AV-619, "AV CONTROL UNIT : Diagnosis

Procedure"

.

Is the inspection result normal?

YES

>> Replace AV control unit.

NO

>> Repair or replace malfunctioning parts.

Part name

Description

AV CONTROL UNIT

• Integrates hard disk drive (HDD) 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 communication. It operates each system according to communication 
signals from the AV control unit.

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

gation, satellite radio, and vehicle information functions.

• It is connected to ECM, A/C auto amp. and combination meter via CAN com-

munication to obtain necessary information for the vehicle information function.

• It is connected to BCM via CAN communication transmitting/receiving for the 

vehicle settings function.

• It inputs the illumination signals that are required for the display dimming con-

trol.

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

parking brake). 

• Update of map data is performed with the CONSULT-III and the applicable ca-

ble.

• It includes the TEL adapter and Bluetooth

™

 function.

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.

Revision: 2008 October

2009 Murano

AV

U1204 GPS

AV-609

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

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U1204 GPS

Description

INFOID:0000000003356601

An intermittent error caused by strong radio interference may be detected unless any symptom (GPS recep-
tion error, etc.) occurs. Replace the AV control unit if the malfunction occurs constantly. Refer to 

AV-764,

"Exploded View"

.

DTC Logic

INFOID:0000000003356602

Diagnosis Procedure

INFOID:0000000003356603

1.

PERFORM THE SELF-DIAGNOSIS

1.

Delete the self-diagnosis results. Turn ignition switch OFF.

2.

Turn ignition switch ON. Perform the self-diagnosis again. 

3.

Check that the DTC is detected again.

Is any DTC detected?

YES

>> Replace AV control unit.

NO

>> The intermittent malfunction caused by strong radio interference can be detected.

Part name

Description

AV CONTROL UNIT

• Integrates hard disk drive (HDD) 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 communication. It operates each system according to communication 
signals from the AV control unit.

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

gation, satellite radio, 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 is connected to BCM via CAN communication transmitting/receiving for the 

vehicle settings function.

• It inputs the illumination signals that are required for the display dimming con-

trol.

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

parking brake). 

• Update of map data is performed with the CONSULT-III and the applicable ca-

ble.

• It includes the TEL adapter and Bluetooth

™

 function.

DTC

Display contents of 

CONSULT-III

DTC Detection Condition

Action to take

U1204

GPS CONN
[U1204]

Internal malfunction of AV control unit (GPS malfunction) 
is detected.

An intermittent error caused by strong 
radio interference may be detected 
unless a symptom (GPS reception er-
ror, etc.) occurs.
Replace the AV control unit if the mal-
function occurs constantly.

Revision: 2008 October

2009 Murano

AV-610

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U1205 GPS

U1205 GPS

Description

INFOID:0000000003556528

An intermittent error caused by strong radio interference may be detected unless any symptom (GPS recep-
tion error, etc.) occurs. Replace the AV control unit if the malfunction occurs constantly. Refer to 

AV-764,

"Exploded View"

.

DTC Logic

INFOID:0000000003356605

Diagnosis Procedure

INFOID:0000000003356606

1.

PERFORM THE SELF-DIAGNOSIS

1.

Delete the self-diagnosis results. Turn ignition switch OFF.

2.

Turn ignition switch ON. Perform the self-diagnosis again. 

3.

Check that the DTC is detected again.

Is any DTC detected?

YES

>> Replace AV control unit.

NO

>> The intermittent malfunction caused by strong radio interference can be detected.

Part name

Description

AV CONTROL UNIT

• Integrates hard disk drive (HDD) 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 communication. It operates each system according to communication 
signals from the AV control unit.

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

gation, satellite radio, 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 is connected to BCM via CAN communication transmitting/receiving for the 

vehicle settings function.

• It inputs the illumination signals that are required for the display dimming con-

trol.

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

parking brake). 

• Update of map data is performed with the CONSULT-III and the applicable ca-

ble.

• It includes the TEL adapter and Bluetooth

™

 function.

DTC

Display contents of 

CONSULT-III

DTC Detection Condition

Action to take

U1205

GPS ROM
[U1205]

Internal malfunction of AV control unit (GPS malfunction) 
is detected.

An intermittent error caused by strong 
radio interference may be detected 
unless a symptom (GPS reception er-
ror, etc.) occurs.
Replace the AV control unit if the mal-
function occurs constantly.

Revision: 2008 October

2009 Murano

AV

U1206 GPS

AV-611

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

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U1206 GPS

Description

INFOID:0000000003556529

An intermittent error caused by strong radio interference may be detected unless any symptom (GPS recep-
tion error, etc.) occurs. Replace the AV control unit if the malfunction occurs constantly. Refer to 

AV-764,

"Exploded View"

.

DTC Logic

INFOID:0000000003356608

Diagnosis Procedure

INFOID:0000000003356609

1.

PERFORM THE SELF-DIAGNOSIS

1.

Delete the self-diagnosis results. Turn ignition switch OFF.

2.

Turn ignition switch ON. Perform the self-diagnosis again. 

3.

Check that the DTC is detected again.

Is any DTC detected?

YES

>> Replace AV control unit.

NO

>> The intermittent malfunction caused by strong radio interference can be detected.

Part name

Description

AV CONTROL UNIT

• Integrates hard disk drive (HDD) 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 communication. It operates each system according to communication 
signals from the AV control unit.

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

gation, satellite radio, 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 is connected to BCM via CAN communication transmitting/receiving for the 

vehicle settings function.

• It inputs the illumination signals that are required for the display dimming con-

trol.

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

parking brake). 

• Update of map data is performed with the CONSULT-III and the applicable ca-

ble.

• It includes the TEL adapter and Bluetooth

™

 function.

DTC

Display contents of 

CONSULT-III

DTC Detection Condition

Action to take

U1206

GPS RAM
[U1206]

Internal malfunction of AV control unit (GPS malfunction) 
is detected.

An intermittent error caused by strong 
radio interference may be detected 
unless a symptom (GPS reception er-
ror, etc.) occurs.
Replace the AV control unit if the mal-
function occurs constantly.

Revision: 2008 October

2009 Murano

AV-612

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U1207 GPS

U1207 GPS

Description

INFOID:0000000003556530

An intermittent error caused by strong radio interference may be detected unless any symptom (GPS recep-
tion error, etc.) occurs. Replace the AV control unit if the malfunction occurs constantly. Refer to 

AV-764,

"Exploded View"

.

DTC Logic

INFOID:0000000003356611

Diagnosis Procedure

INFOID:0000000003356612

1.

PERFORM THE SELF-DIAGNOSIS

1.

Delete the self-diagnosis results. Turn ignition switch OFF.

2.

Turn ignition switch ON. Perform the self-diagnosis again. 

3.

Check that the DTC is detected again.

Is any DTC detected?

YES

>> Replace AV control unit.

NO

>> The intermittent malfunction caused by strong radio interference can be detected.

Part name

Description

AV CONTROL UNIT

• Integrates hard disk drive (HDD) 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 communication. It operates each system according to communication 
signals from the AV control unit.

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

gation, satellite radio, 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 is connected to BCM via CAN communication transmitting/receiving for the 

vehicle settings function.

• It inputs the illumination signals that are required for the display dimming con-

trol.

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

parking brake). 

• Update of map data is performed with the CONSULT-III and the applicable ca-

ble.

• It includes the TEL adapter and Bluetooth

™

 function.

DTC

Display contents of 

CONSULT-III

DTC Detection Condition

Action to take

U1207

GPS RTC
[U1207]

Internal malfunction of AV control unit (GPS malfunction) 
is detected.

An intermittent error caused by strong 
radio interference may be detected 
unless a symptom (GPS reception er-
ror, etc.) occurs.
Replace the AV control unit if the mal-
function occurs constantly.

Revision: 2008 October

2009 Murano

AV

U1243 DISPLAY UNIT

AV-613

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

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U1243 DISPLAY UNIT

Description

INFOID:0000000003356613

DTC Logic

INFOID:0000000003356614

Diagnosis Procedure

INFOID:0000000003356615

1.

CHECK FRONT DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT

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

AV-619, "FRONT DISPLAY UNIT : Diagno-

sis 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.

Part name

Description

FRONT DISPLAY UNIT

• Front 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 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]

When either one of the following items are detected:
• serial communication circuits between AV control unit 

and front display unit are malfunctioning.

• serial communication signal between AV control unit 

and front display unit is malfunctioning.

• Front display unit power supply and 

ground circuits.

• Serial communication circuits be-

tween AV control unit and display 
unit.

Front display unit

AV control unit

Continuity

Connector

Terminals

Connector

Terminals

M49

11

M146

70

Existed

22

71

Front display unit

Ground

Continuity

Connector

Terminals

M49

11

Not existed

22

Revision: 2008 October

2009 Murano

AV-614

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U1243 DISPLAY UNIT

2.

Turn ignition switch ON.

3.

Check signal between front display unit harness connector terminal and ground using an oscilloscope.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace AV control unit.

4.

CHECK COMMUNICATION SIGNAL

Check signal between display unit harness connector and ground using an oscilloscope.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace front display unit.

(+)

(

−

)

Condition

Signal

Front display unit

Connector

Terminal

M49

11

Ground

When adjusting display bright 
ness.

PKIB5039J

(+)

(

−

)

Condition

Signal

Front display unit

Connector

Terminal

M49

22

Ground

When adjusting display bright 
ness.

PKIB5039J

Revision: 2008 October

2009 Murano

AV

U1244 GPS ANTENNA

AV-615

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

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U1244 GPS ANTENNA

Description

INFOID:0000000003356616

DTC Logic

INFOID:0000000003356617

Diagnosis Procedure

INFOID:0000000003356618

1.

GPS ANTENNA CHECK

Visually check GPS antenna and antenna feeder.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair malfunctioning parts.

2.

CHECK AV CONTROL UNIT VOLTAGE 

1.

Disconnect GPS antenna connector.

2.

Turn ignition switch ON.

3.

Check voltage between AV control unit terminal and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace AV control unit.

Part name

Description

GPS ANTENNA

GPS signal is received and transmitted to AV control unit.

DTC

Display contents of 

CONSULT-III

DTC Detection Condition

Possible causes

U1244

GPS ANTENNA CONN
[U1244]

GPS antenna connection malfunction is detected.

GPS antenna disconnection.

(+)

(

−

)

Voltage

(Approx.)

AV control unit

Connector

Terminal

M380

110

Ground

5.0 V

Revision: 2008 October

2009 Murano

AV-616

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U1250 CAMERA CONTROL UNIT

U1250 CAMERA CONTROL UNIT

Description

INFOID:0000000003356619

DTC Logic

INFOID:0000000003356620

Diagnosis Procedure

INFOID:0000000003356621

1.

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 and camera control unit harness connector.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair harness or connector.

2.

CHECK AV CONTROL UNIT VOLTAGE

1.

Connect AV control unit connector.

2.

Turn ignition switch ON.

3.

Check voltage between AV control unit harness connector and ground.

Is the inspection result normal?

YES

>> Replace camera control unit.

NO

>> Replace AV control unit.

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 transmitted to rear view camera.
• Controlled by AV communication transmitted 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]

Malfunction is detected in camera connection recognition 
circuit between AV control unit and camera control unit.

Camera-connection recognition cir-
cuit between AV control unit and cam-
era control unit.

AV control unit

Camera control unit

Continuity

Connector

Terminal

Connector

Terminal

M145

40

B60

14

Existed

(+)

(

−

)

Voltage

(Approx.)

AV control unit

Connector

Terminal

M145

40

Ground

5.0 V

Revision: 2008 October

2009 Murano

AV

U1258 SATELLITE RADIO ANTENNA

AV-617

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U1258 SATELLITE RADIO ANTENNA

Description

INFOID:0000000003356622

DTC Logic

INFOID:0000000003356623

Diagnosis Procedure

INFOID:0000000003356624

1.

SATELLITE RADIO ANTENNA CHECK

Visually check satellite radio antenna and antenna feeder.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair malfunctioning parts.

2.

CHECK AV CONTROL UNIT VOLTAGE 

1.

Disconnect satellite radio antenna connector.

2.

Turn ignition switch ON.

3.

Check voltage between AV control unit terminal and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace AV control unit.

Part name

Description

SATELLITE RADIO ANTENNA

Satellite radio waves are received and transmitted to AV control unit.

DTC

Display contents of 

CONSULT-III

DTC Detection Condition

Possible causes

U1258

XM ANTENNA CONN
[U1258]

Satellite radio antenna connection malfunction is detect-
ed.

• Satellite radio antenna feeder.
• Satellite radio antenna.

(+)

(

−

)

Voltage

(Approx.)

AV control unit

Connector

Terminal

M372

108

Ground

5.0 V

Revision: 2008 October

2009 Murano

AV-618

< COMPONENT DIAGNOSIS >

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U1300 AV COMM CIRCUIT

U1300 AV COMM CIRCUIT

Description

INFOID:0000000003356625

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

NOTE:

*: Non-equipped item is not displayed.

DTC

Display contents of 

CONSULT-III

Description

Possible malfunction factor/Action to 

take

U1300
U121F

• AV COMM CIRCUIT 

[U1300]

• INTERNAL COMM 

[U121F]

Malfunction is detected in AV control unit power supply 
and ground circuits.

Check AV control unit power supply 
and ground circuits. When detecting no 
malfunction in those components, re-
place AV control unit.

U1300
U1240

• AV COMM CIRCUIT 

[U1300]

• SWITCH CONN 

[U1240]

When either one of the following items are detected:
• multifunction switch power supply and ground circuits 

are malfunctioning.

• AV communication circuits between AV control unit 

and multifunction switch are malfunctioning.

• AV communication signal between AV control unit and 

multifunction switch is malfunctioning.

• Multifunction switch power supply 

and ground circuits.

• AV communication circuits between 

AV control unit and multifunction 
switch.

U1300
U1252

• AV COMM CIRCUIT 

[U1300]

• REAR CAMERA LAN 

CONN [U1252]

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

are malfunctioning.

• AV communication circuits between multifunction and 

camera control unit are malfunctioning.

• AV communication signal between AV control unit and 

camera control unit is malfunctioning.

• Camera control unit power supply 

and ground circuits.

• AV communication circuits between 

multifunction switch and camera 
control unit.

U1300
U1254

• AV COMM CIRCUIT 

[U1300]

• IPod CONN [U1254]

When either one of the following items are detected:
• iPod adapter power supply and ground circuits are 

malfunctioning.

• AV communication circuits between multifunction 

switch and iPod adapter are malfunctioning.

• AV communication signal between AV control unit and 

iPod adapter is malfunctioning.

• iPod adapter power supply and 

ground circuits.

• AV communication circuits between 

multifunction switch unit and iPod 
adapter.

U1300
U1252

U1254

*

• AV COMM CIRCUIT 

[U1300]

• REAR CAMERA LAN 

CONN [U1252]

• IPod CONN [U1254]

*

Malfunction is detected in AV communication circuits be-
tween camera control unit and the junction of AV control 
unit and multifunction switch. 

AV communication circuits between 
camera control unit and the junction of 
AV control unit and multifunction 
switch.

U1300
U1240
U1252

U1254

*

• AV COMM CIRCUIT 

[U1300]

• SWITCH CONN 

[U1240]

• REAR CAMERA LAN 

CONN [U1252]

• IPod CONN [U1254]

*

Malfunction is detected in AV communication circuits be-
tween AV control unit and multifunction switch.

AV communication circuits between AV 
control unit and the junction of camera 
control unit and multifunction switch.

U1300
U121F
U1240
U1252

U1254

*

• AV COMM CIRCUIT 

[U1300]

• INTERNAL COMM 

[U121F]

• SWITCH CONN 

[U1240]

• REAR CAMERA LAN 

CONN [U1252]

• IPod CONN [U1254]*

Malfunction is detected in AV communication circuits.

Check and repair the short circuit in AV 
communication circuits.

Revision: 2008 October

2009 Murano

AV

POWER SUPPLY AND GROUND CIRCUIT

AV-619

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POWER SUPPLY AND GROUND CIRCUIT

AV CONTROL UNIT

AV CONTROL UNIT : Diagnosis Procedure

INFOID:0000000003356626

1.

CHECK FUSE

Check for blown fuses.

Is the inspection result normal?

YES

>> GO TO 2.

NO

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

2.

CHECK POWER SUPPLY CIRCUIT

Check voltage between AV control unit harness connectors and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Check harness between AV control unit and fuse.

3.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect AV control unit connectors.

3.

Check continuity between AV control unit harness connectors and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

FRONT DISPLAY UNIT

FRONT DISPLAY UNIT : Diagnosis Procedure

INFOID:0000000003356627

1.

CHECK FUSE

Check for blown fuses.

Power source

Fuse No.

Battery

35

Ignition switch ACC or ON

19

Ignition switch ON or START 

3

Signal name

Connector No.

Terminal No.

Ignition switch position

Value (Approx.)

Battery power supply

M144

19

OFF

Battery voltage

M145

22

24

ACC power supply

M144

7

ACC

Battery voltage

M145

25

Ignition signal

M145

35

ON

Battery voltage

Signal name

Connector No.

Terminal No.

Ignition switch position

Continuity 

Ground

M145

21

OFF

Existed

23

Power source

Fuse No.

Battery

35

Ignition switch ACC or ON

19

Revision: 2008 October

2009 Murano

AV-620

< COMPONENT DIAGNOSIS >

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POWER SUPPLY AND GROUND CIRCUIT

Is the inspection result normal?

YES

>> GO TO 2.

NO

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

2.

CHECK POWER SUPPLY CIRCUIT

Check voltage between display unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Check harness between Display unit and fuse.

3.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect display unit connector.

3.

Check continuity between display unit harness connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

MULTIFUNCTION SWITCH

MULTIFUNCTION SWITCH : Diagnosis Procedure

INFOID:0000000003356628

1.

CHECK FUSE

Check for blown fuses.

Is the inspection result normal?

YES

>> GO TO 2.

NO

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

2.

CHECK POWER SUPPLY CIRCUIT

Check voltage between multifunction switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Check harness between multifunction switch and fuse.

3.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect multifunction switch connector.

3.

Check continuity between multifunction switch harness connector and ground.

Signal name

Connector No.

Terminal No.

Ignition switch position

Value (Approx.)

Battery power supply

M49

2

OFF

Battery voltage

ACC power supply

3

ACC

Signal name

Connector No.

Terminal No.

Ignition switch position

Continuity 

Ground

M49

1

OFF

Existed

13

Power source

Fuse No.

Ignition switch ACC or ON

19

Signal name

Connector No.

Terminal No.

Ignition switch position

Value (Approx.)

ACC power supply

M125

3

ACC

Battery voltage

Signal name

Connector No.

Terminal No.

Ignition switch position

Continuity 

Ground

M125

1

OFF

Existed

Revision: 2008 October

2009 Murano