Content .. 49 50 51 52 ..

Nissan Murano Z51 (2008 year). Manual - part 51

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV-589

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

• Change Application ID
- Any application ID'-s required to receive traffic information from the

satellite radio system can be set.

Delete Unit Connection Log

Deletes any unit connection records and error records from the AV
control unit memory. (Clear the records of the unit that has been
removed.)

Initialize Settings

Deletes data stored in HDD.

CONSULT-III Function (MULTI AV)

INFOID:0000000003356565

CONSULT-III FUNCTIONS

CONSULT-III performs the following functions via the communication with the AV control unit.

AV COMMUNICATION

When “AV communication” of “CAN Diag Support Monitor” is selected, the following function will be performed.

ECU IDENTIFICATION

The part number of AV control unit is displayed.

JSNIA0093GB

JSNIA0088GB

JSNIA0095GB

Diagnosis mode

Description

Ecu Identification

The part number of AV control unit can be checked.

Self Diagnostic Result

Performs a diagnosis on the AV control unit and a connection diagnosis for the communication
circuit of the MULTI AV system, and displays the current and past malfunctions collectively.

Data Monitor

The diagnosis of vehicle signal that is input to the AV control unit can be performed.

AV communication

AV&NAVI C/U

Displays the communication status from AV control unit to each unit as well as the error
counter.

AUDIO

Displays the AV control unit communication status and the error counter.

Revision: 2008 October

2009 Murano

AV-590

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

SELF DIAGNOSIS RESULT

• In CONSULT-III self-diagnosis, self-diagnosis results and error history are displayed collectively.
• A current malfunction indicates “crnt”. a past malfunction indicates “past”.
• The timing is displayed as “0” if any of the error codes [U1000], [U1010], [U1300] and [U1310] is detected.

the counter increases by 1 if the status is normal at the next ignition switch on cycle.

Self-diagnosis Results Display Item

Error item

Description

Possible malfunction factor/Action to take

CAN COMM CIRCUIT [U1000]

CAN communication malfunction is detect-
ed.

Refer to

AV-593, "Diagnosis Procedure"

CONTROL UNIT (CAN) [U1010]

CAN initial diagnosis malfunction is detect-
ed.

Replace the AV control unit.

CONTROL UNIT (AV) [U1310]

AV communication circuit initial diagnosis
malfunction is detected.

Control Unit FLASH-ROM [U1200]

AV control unit malfunction is detected.

Gyro NO CONN [U1201]

CAN CONT [U1216]

BLUETOOTH CONN [U1217]

HDD CONN [U1218]

HDD READ [U1219]

XM SERIAL COMM [U1220]

HDD WRITE [U121A]

HDD COMM [U121B]

HDD ACCESS [U121C]

DSP CONN [U121D]

DSP COMM [U121E]

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 mal-
function in those components, replace AV
control unit.

GPS COMM [U1204]

GPS malfunction is detected.

An intermittent error caused by strong radio
interference may be detected unless a
symptom (GPS reception error, etc.) oc-
curs.
Replace the AV control unit if the malfunc-
tion occurs constantly.

GPS ROM [U1205]

GPS RAM [U1206]

GPS RTC [U1207]

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

AV control unit and front display unit are
malfunctioning.

• serial communication signal between AV

control unit and front display unit is mal-
functioning.

• Front display unit power supply and

ground circuits.

• Serial communication circuits between

AV control unit and display unit.

GPS ANTENNA CONN [U1244]

GPS antenna connection malfunction is de-
tected.

GPS antenna.

CAMERA CONT CONN [U1250]

Malfunction is detected in camera connec-
tion recognition circuit between AV control
unit and camera control unit.

Camera-connection recognition circuit be-
tween AV control unit and camera control
unit.

XM ANTENNA CONN [U1258]

Satellite radio antenna connection malfunc-
tion is detected.

• Satellite radio antenna feeder.
• Antenna base.

Revision: 2008 October

2009 Murano

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV-591

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

NOTE:

*: Non-equipped item is not displayed.

DATA MONITOR

All Signals

• Displays the status of the following vehicle signals inputted into the AV control unit.
• For each signal, the actual signal can be compared with the status recognized on the system.

• 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 mal-
function in those components, replace AV
control unit.

• 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.

• 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 mul-

tifunction switch and camera control unit
is 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 mul-

tifunction switch and camera control unit.

• 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 mul-

tifunction switch and iPod adapter are
malfunctioning.

• AV communication signal between AV

control unit and iPod adapter is malfunc-
tioning.

• iPod adapter power supply and ground

circuits.

• AV communication circuits between mul-

tifunction switch unit and iPod adapter.

• AV COMM CIRCUIT [U1300]
• REAR CAMERA LAN CONN [U1252]

• IPod CONN [U1254]

Malfunction is detected in AV communica-
tion circuits between camera control unit
and the junction of AV control unit and mul-
tifunction switch.

AV communication circuits between cam-
era control unit and the junction of AV con-
trol unit and multifunction switch.

• AV COMM CIRCUIT [U1300]
• SWITCH CONN [U1240]
• REAR CAMERA LAN CONN [U1252]

• IPod CONN [U1254]

Malfunction is detected in AV communica-
tion circuits between AV control unit and
multifunction switch.

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

• AV COMM CIRCUIT [U1300]
• INTERNAL COMM [U121F]
• SWITCH CONN [U1240]
• REAR CAMERA LAN CONN [U1252]
• IPod CONN [U1254]*

Malfunction is detected in AV communica-
tion circuits.

Check and repair the short circuit in AV
communication circuits.

Error item

Description

Possible malfunction factor/Action to take

Revision: 2008 October

2009 Murano

AV-592

< FUNCTION DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

Selection From Menu

allows the technician to select which vehicle signals should be displayed and displays the status of the
selected vehicle signals.

Display Item

Display

Vehicle status

Remarks

VHCL SPD SIG

Vehicle speed >0 km/h (0 MPH)

Changes in indication may be delayed. This is
normal.

Off

Vehicle speed =0 km/h (0 MPH)

PKB SIG

Parking brake is applied.

Off

Parking brake is released.

ILLUM SIG

Block the light beam from the auto
light optical sensor when the light
SW is ON.

—

Off

Expose the auto light optical sensor
to light when the light SW is OFF or
ON.

IGN SIG

Ignition switch ON

Off

Ignition switch in the ACC position

REV SIG

Selector lever in the “R” position

Changes in indication may be delayed. This is
normal.

Off

Selector lever in any position other
than the “R” position

Item to be selected

Description

VHCL SPD SIG

The same as when “ALL SIGNALS”
is selected.

PKB SIG

ILLUM SIG

IGN SIG

REV SIG

Revision: 2008 October

2009 Murano

U1000 CAN COMM CIRCUIT

AV-593

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000003356566

CAN (Controller Area Network) is a serial communication line for real-time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independently). In CAN communication, control units are connected with 2
communication lines (CAN-H, CAN-L) allowing a high rate of information transmission with less wiring. Each
control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. Refer to

LAN-25, "CAN Communication Signal Chart"

DTC Logic

INFOID:0000000003356567

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000003356568

PERFORM SELF-DIAGNOSTIC

Turn ignition switch ON and wait for 2 seconds or more.

Check “Self Diagnostic Result” of “MULTI AV”.

Is “CAN COMM CIRCUIT” displayed?

YES

>> Refer to “LAN system”. Refer to

LAN-16, "Trouble Diagnosis Flow Chart"

>> Refer to GI section. Refer to

GI-40, "Intermittent Incident"

DTC

Display contents of CON-

SULT-III

Diagnostic item is detected when...

Probable malfunction location

U1000

CAN COMM CIRCUIT

AV control unit is not transmitting or receiving
CAN communication signal for 2 seconds or
more.

CAN communication system.

Revision: 2008 October

2009 Murano

AV-594

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U1010 CONTROL UNIT (CAN)

U1010 CONTROL UNIT (CAN)

Description

INFOID:0000000003356569

Initial diagnosis of AV control unit.

DTC Logic

INFOID:0000000003356570

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000003356571

REPLACE AV CONTROL UNIT

When DTC U1010 is detected, replace AV control unit.

>> INSPECTION END

DTC

Display contents of CON-

SULT-III

Diagnostic item is detected when...

Probable malfunction location

U1010

CONTROL UNIT (CAN)

CAN initial diagnosis malfunction is detected.

AV control unit.

Revision: 2008 October

2009 Murano

U1310 AV CONTROL UNIT

AV-595

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U1310 AV CONTROL UNIT

Description

INFOID:0000000003356572

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

AV-764, "Exploded View"

DTC Logic

INFOID:0000000003356573

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

U1310

CONTROL UNIT (AV)
[U1310]

An initial diagnosis error is detected in AV communication
circuit.

Replace AV control unit.

Revision: 2008 October

2009 Murano

AV-596

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U1200 AV CONTROL UNIT

U1200 AV CONTROL UNIT

Description

INFOID:0000000003356574

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

AV-764, "Exploded View"

DTC Logic

INFOID:0000000003356575

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

U1200

Cont Unit
FLASH-ROM
[U1200]

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

Replace AV control unit.

Revision: 2008 October

2009 Murano

U1201 AV CONTROL UNIT

AV-597

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U1201 AV CONTROL UNIT

Description

INFOID:0000000003356576

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

AV-764, "Exploded View"

DTC Logic

INFOID:0000000003356577

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

U1201

GYRO NO CONN
[U1201]

Internal malfunction of AV control unit (gyrocompass dis-
connection) is detected.

Replace AV control unit.

Revision: 2008 October

2009 Murano

AV-598

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U1216 AV CONTROL UNIT

U1216 AV CONTROL UNIT

Description

INFOID:0000000003356578

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

AV-764, "Exploded View"

DTC Logic

INFOID:0000000003356579

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

U1216

CAN CONT
[U1216]

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

Replace AV control unit.

Revision: 2008 October

2009 Murano

U1217 AV CONTROL UNIT

AV-599

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U1217 AV CONTROL UNIT

Description

INFOID:0000000003356580

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

AV-764, "Exploded View"

DTC Logic

INFOID:0000000003356581

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

U1217

BLUETOOTH MODULE
CONN
[U1217]

Internal malfunction of AV control unit (Bluetooth module
connection malfunction) is detected.

Replace AV control unit.

Revision: 2008 October

2009 Murano

AV-600

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U1218 AV CONTROL UNIT

U1218 AV CONTROL UNIT

Description

INFOID:0000000003356582

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

AV-764, "Exploded View"

DTC Logic

INFOID:0000000003356583

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

U1218

HDD-CONN
[U1218]

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

Replace AV control unit.

Revision: 2008 October

2009 Murano

U1219 AV CONTROL UNIT

AV-601

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U1219 AV CONTROL UNIT

Description

INFOID:0000000003356584

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

AV-764, "Exploded View"

DTC Logic

INFOID:0000000003356585

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

U1219

HDD-READ
[U1219]

Internal malfunction of AV control unit (HDD read malfunc-
tion) is detected.

Replace AV control unit.

Revision: 2008 October

2009 Murano

AV-602

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U1220 AV CONTROL UNIT

U1220 AV CONTROL UNIT

Description

INFOID:0000000003356586

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

AV-764, "Exploded View"

DTC Logic

INFOID:0000000003356587

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

U1220

XM SERIAL COMM
[U1220]

Internal malfunction of AV control unit (satellite radio tuner
communication error) is detected.

Replace AV control unit.

Revision: 2008 October

2009 Murano

U121A AV CONTROL UNIT

AV-603

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U121A AV CONTROL UNIT

Description

INFOID:0000000003356588

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

AV-764, "Exploded View"

DTC Logic

INFOID:0000000003356589

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

U121A

HDD-WRITE
[U121A]

Internal malfunction of AV control unit (HDD write mal-
function) is detected.

Replace AV control unit.

Revision: 2008 October

2009 Murano

AV-604

< COMPONENT DIAGNOSIS >

[BOSE AUDIO WITH NAVIGATION]

U121B AV CONTROL UNIT

U121B AV CONTROL UNIT

Description

INFOID:0000000003356590

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

AV-764, "Exploded View"

DTC Logic

INFOID:0000000003356591

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

U121B

HDD-COMM
[U121B]

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

Replace AV control unit.

Revision: 2008 October

2009 Murano

Content .. 49 50 51 52 ..