Nissan Murano. Manual - part 70

AV-58

< SYSTEM DESCRIPTION >

[BASE AUDIO WITH COLOR DISPLAY]

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

2.

Diagnosis results are displayed after the self-diagnosis is com-
pleted. The unit names and the connection lines are color-coded
according to the diagnostic results.

NOTE:

Control unit (AV control unit) and is displayed in red.

• Replace AV control unit if “Self-Diagnosis did not run because of a control unit malfunction” is indicated. The symptom is AV con-

trol unit internal error. Refer to 

AV-149, "Exploded View"

.

• If multiple errors occur at the same time for a single unit, the screen switch colors are determined according to the following order

of priority: red > gray.

-

The comments of the self-diagnosis results can be viewed with a
component in the diagnosis result screen.

Detection Range of Self-diagnosis Mode

• The self-diagnosis mode allows the technician to diagnose the connection in the communication line

between AV control unit and each unit and the internal operation of the AV control unit.

• Because the start condition of diagnosis function is a switch operation, the on board diagnosis function can-

not be started up if any malfunction is detected in the communication circuit between AV control unit and
multifunction switch.

SELF-DIAGNOSIS RESULTS

Check the applicable display at the following table, and then repair the malfunctioning parts.

Only Unit Part Is Displayed In Red.

A Connecting Cable Between Units Is Displayed In Yellow.

Diagnosis results

Unit

Connec-

tion line

Normal

Green

Green

Connection malfunction

Gray

Yellow

Unit malfunction 

Note

Red

Green

JSNIA2528ZZ

JSNIA0141GB

Screen switch

Description

Possible malfunction location / Action to 

take

Control unit

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

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV-59

< SYSTEM DESCRIPTION >

[BASE AUDIO WITH COLOR DISPLAY]

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CONFIRMATION/ADJUSTMENT MODE

1.

Start the diagnosis function and select “Confirmation/Adjustment”. The confirmation/adjustment mode
indicates where each item can be checked or adjusted.

2.

Select each switch on the “Confirmation/Adjustment Mode”
screen to display the relevant trouble diagnosis screen. Press
the “BACK” switch to return to the initial Confirmation/Adjust-
ment Mode screen.

Area with yellow connection lines

Description

Possible malfunction location / Action to 

take

Control unit 

⇔

 Front Display

Malfunction is detected in serial communi-
cation circuits between AV control unit and 
display unit.

Serial communication circuits between AV 
control unit and display unit.

Control unit 

⇔

 SAT

When either one of the following items is 
detected:
• satellite radio tuner power supply and 

ground circuit are malfunctioning.

• communication circuits between AV con-

trol unit and satellite radio tuner are mal-
functioning.

• request signal circuit between AV control 

unit and satellite radio tuner are malfunc-
tioning.

• Satellite radio tuner power supply and 

ground circuit.
Refer to 

AV-119, "SATELLITE RADIO 

TUNER : Diagnosis Procedure"

.

• Communication circuit between AV con-

trol unit and satellite radio tuner.

• Request signal circuit between AV con-

trol unit and satellite radio tuner.

Control unit 

⇔

 BTHF

When either one of the following items is 
detected:
• TEL adapter unit power supply and 

ground circuits are malfunctioning.

• AV communication circuits between AV 

control unit and TEL adapter unit are 
malfunctioning.

• TEL adapter unit power supply and 

ground circuits.
Refer to 

AV-120, "TEL ADAPTER UNIT : 

Diagnosis Procedure"

.

• AV communication circuits between AV 

control unit and TEL adapter unit.

JSNIA0147GB

AV-60

< SYSTEM DESCRIPTION >

[BASE AUDIO WITH COLOR DISPLAY]

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

Display Diagnosis

Vehicle Signals

A comparison check can be made of each actual vehicle signal and
the signals recognized by the system.

JSNIA2233GB

JSNIA0149GB

Diagnosis item

Display

Vehicle status

Remarks

Vehicle speed

ON

Vehicle speed > 0 km/h (0 MPH)

Changes in indication may be delayed. This is normal.

OFF

Vehicle speed = 0 km/h (0 MPH)

Parking brake

ON

Parking brake is applied.

OFF

Parking brake is released.

Lights

ON

Lighting switch is ON

—

OFF

Lighting switch is OFF

Ignition

ON

Ignition switch is ON

—

OFF

Ignition switch is in ACC position

AV

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV-61

< SYSTEM DESCRIPTION >

[BASE AUDIO WITH COLOR DISPLAY]

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Speaker Test

Select “Speaker Test” to display the Speaker Diagnosis screen.
Press “Start” to generate a test tone in a speaker. Press “Start” again
to generate a test tone in the next speaker. Press “End” to stop the
test tones.

Climate Control

Refer to “HEATER & AIR CONDITIONING CONTROL SYSTEM” for details.

Error History

The self-diagnosis results are judged depending on whether any error occurs from when “Self-diagnosis” is
selected until the self-diagnosis results are displayed.
However, the diagnosis results are judged normal if an error has occurred before the ignition switch is turned
ON and then no error has occurred until the self-diagnosis start. Check the “Error Record” to detect any error
that may have occurred before the self-diagnosis start because of this situation.
The error record displays the time and place of the most recent occurrence of that error. However, take note of
the following points.
The frequency of occurrence is displayed in a count up manner. The actual count up method differs depending
on the error item. 

Count up method A

• The counter resets to 0 if an error occurs when ignition switch is turned ON. The counter increases by 1 if

the condition is normal at a next ignition ON cycle. 

• The counter upper limit is 39. Any counts exceeding 39 are ignored.“ The counter can be reset (no error

record display) with the “Delete log” switch or CONSULT.

Count up method B

• The counter increases by 1 if an error occurs when ignition switch is ON. The counter will not decrease even

if the condition is normal at the next ignition ON cycle. 

• The counter upper limit is 50. Any counts exceeding 50 are ignored. “ The counter can be reset (no error

record display) with the “Delete log” switch or CONSULT.

Reverse

ON

Selector lever is in R position

Changes in indication may be delayed. This is normal.

OFF

Selector lever is in any position oth-
er than R

Diagnosis item

Display

Vehicle status

Remarks

JSNIA0150GB

Display type of occur-

rence frequency

Error history display item

Count up method A

CAN communication line, control unit (CAN), AV communication line, control unit (AV)

Count up method B

Other than the above