Nissan Leaf. Manual - part 28

 

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Nissan Leaf. Manual - part 28

 

 

AV

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV-103

< SYSTEM DESCRIPTION >

[AUDIO W/O NAVI (FOR MEXICO)]

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DIAGNOSIS SYSTEM (AV CONTROL UNIT)

Diagnosis Description

INFOID:0000000010385197

• Diagnosis is performed with the on board diagnosis and CONSULT. Select an appropriate function based on

the condition. Perform the on board diagnosis if it starts. If the on board diagnosis does not start such as no

display, perform diagnosis with CONSULT.

• In the on board diagnosis, a multifunction switch operation starts the AV control unit diagnosis function and

AV control unit performs a diagnosis for each system unit. Diagnosis results are displayed on the screen.

• In the CONSULT diagnosis, a communication signal starts the AV control unit diagnosis function and the AV

control unit performs a diagnosis for each system unit.

On Board Diagnosis Function

INFOID:0000000010385198

ON BOARD DIAGNOSIS ITEM

• The on board diagnosis function has a self-diagnosis mode for conducting trouble diagnosis automatically

and a confirmation/adjustment mode for operating manually.

• Self-diagnosis mode performs diagnosis of the AV control unit and the connection between AV control unit

and multifunction switch. The AV control unit displays the results on the display.

• The confirmation/adjustment mode allows the technician to check, modify or adjust the vehicle signals and

set values, as well as to monitor the system error records and system communication status. The check,

modify or adjust actions generally require human intervention and judgment (the system cannot judge auto-

matically).

Starting procedure

1. Turn the power switch ON.
2. Turn the audio system off.

Mode

Description

Self Diagnosis

• AV control unit diagnosis.
• Diagnoses the connection between AV control unit and multifunction 

switch.

Confirmation/

Adjustment

Display Diagnosis

The following check functions are available: color tone check by Color 
Spectrum Bar and White Display, light and shade check by Gradation 
Bar and Touch Panel calibration response check.

Vehicle Signals

Diagnosis of signals can be performed for vehicle speed, parking brake, 
lights, power switch and reverse.

Steering Angle Adjustment

When there is a difference between the actual turning angle and the ve-
hicle mark turning angle, it can be adjusted.

Error location display

The system malfunction and the frequency when occurring in the past 
are displayed. When the malfunctioning item is selected, the time and 
place that the selected malfunction last occurred are displayed.

AV COMM Diagnosis

The communication condition of each unit of Multi AV system can be 
monitored.

Hands-free Phone

• The received volume adjustment of hands-free phone and microphone 

speaker check can be performed.

• Mileage display of remote maintenance can be turned ON/OFF.

Clock Settings

The current time can be set.

Delete Unit Connection Log

Erase the connection history of unit and error history.

User Data Initialization

Initializes the AV control unit memory.

Version Information

Version information of the AV control unit is displayed.

Software Update

The current version of the AV control unit software can be updated.

Export Error Log

AV control unit error log can be exported.

AV-104

< SYSTEM DESCRIPTION >

[AUDIO W/O NAVI (FOR MEXICO)]

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

3. Press the “INFO” switch 3 times. Press the “ ” switch 2 times.

Press the “INFO” switch once.

NOTE:

If the on board self-diagnosis does not start, perform diagnosis

using CONSULT. Refer to  

AV-110, "CONSULT Function"

.

4. The initial trouble diagnosis screen displays two choices: “Self-

Diagnosis” and “Confirmation/Adjustment”.

SELF-DIAGNOSIS MODE

1. Start the self-diagnosis function and select “Self Diagnosis”.

-

Self-diagnosis subdivision screen is displayed, and the self-diagnosis mode starts.

-

The bar graph visible on the center of the self-diagnosis subdivision screen indicates progress of the trou-

ble diagnosis.

2. Diagnosis results are displayed after the self-diagnosis is completed. The unit names and the connection

lines are color-coded according to the diagnostic results.

NOTE:

Control unit (AV control unit) 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 control unit internal error. Refer to 

AV-192, "Removal and Installation"

.

• 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.

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Diagnosis results

Unit

Connection line

Normal

Green

Green

Connection malfunction

Gray

Yellow

Unit malfunction 

Note

Red

Green

AV

DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV-105

< SYSTEM DESCRIPTION >

[AUDIO W/O NAVI (FOR MEXICO)]

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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.

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/Adjustment

Mode screen.

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Screen switch

Description

Possible malfunction location / Action to 

take

Control Unit

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

• Check the power supply and ground cir-

cuit.
Refer to 

AV-173, "AV CONTROL UNIT : 

Diagnosis Procedure"

.

• When the power switch is OFF, remove 

and insert the SD card to check for con-
tact malfunction of the SD card, and 
check for an error again.

- If there is no malfunction, poor contact of 

the SD card may be possible. Wait and 
see the condition.

- If an malfunction is found, replace the AV 

control unit.
Refer to 

AV-192, "Removal and Installa-

tion"

.

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AV-106

< SYSTEM DESCRIPTION >

[AUDIO W/O NAVI (FOR MEXICO)]

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.

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