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DIAGNOSIS SYSTEM (AV CONTROL UNIT)

AV CONTROL UNIT : Diagnosis Description


DESCRIPTION

- Diagnosis function consists of the "Self-Diagnosis" mode performed automatically and the "Confirmation/
Adjustment" mode operated manually.
- "Self-Diagnosis" mode checks for connections between the units constituting this system, analyzes each individual unit at the same time, and displays the results on the LCD screen.
- "Confirmation/Adjustment" mode is used to perform trouble diagnosis that requires operation and judgment by an operator (trouble that cannot be automatically judged by the system), to check/change the set value, and to display the error history of the AV control unit.

DIAGNOSIS ITEM







OPERATION PROCEDURE






1.Start the engine.
2.Turn the audio system off.
3.While pressing the "SETTING" button, turn the volume control dial counterclockwise 30 clicks or more. (When the self-diagnosis mode is started, a short beep will be heard.)





4.The initial trouble diagnosis screen will be displayed, and items
"Self-Diagnosis" and "Confirmation/Adjustment" can be selected.

SELF-DIAGNOSIS






1.Perform self-diagnosis by selecting "Self-Diagnosis".
- Self-diagnosis subdivision screen is displayed, and the self-diagnosis mode starts.
- A bar graph visible on the center of the self-diagnosis subdivision screen indicates progress of the trouble diagnosis.
NOTE:
Self-diagnosis requires approximately 10 seconds to complete.





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.










3.Select a component on the "Self-Diagnosis" screen and comments for the diagnosis results will be shown.
Self-Diagnosis Results











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 item on the "Confirmation/Adjustment" mode screen to display the relevant trouble diagnosis screen. Touch "BACK"
on the display unit or press the "BACK" switch to return to the initial Confirmation/Adjustment Mode screen.
Display Diagnosis





Vehicle Signals





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





Speaker Test





Select "Speaker Test" to display the speaker diagnosis screen. Press
"Start" to generate a test tone in speakers. Press "End" to stop the test tones.
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 SW is turned ON and then no error has occurred until the self-diagnosis start. Check the "Error History" to detect any error that may have occurred before the self-diagnosis start because of this situation.
Count up method A
- The counter resets to 0 if an error occurs when IGN switch is turned ON. The counter increases by 1 if the condition is normal at a next IGN 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 IGN switch is ON. The counter will not decrease even if the condition is normal at the next IGN 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.





Vehicle CAN Diagnosis





- CAN communication status and error counter is displayed.
- The error counter displays "OK" if any malfunction was not detected in the past and displays "0" if a malfunction is detected. It increases by 1 if the condition is normal at the next ignition switch
ON cycle. The upper limit of the counter is 39.
- The error counter is erased if reset.
AV COMM Diagnosis





- AV communication status and error counter is displayed.
- The error counter displays "OK" if any malfunction was not detected in the past and displays "0" if a malfunction is detected. It increases by 1 if the condition is normal at the next ignition switch
ON cycle. The upper limit of the counter is 39.
- The error counter is erased if reset.
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





Initializes the AV control unit memory.