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