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DIAGNOSIS SYSTEM (AV CONTROL UNIT)


Diagnosis Description


MULTIFUNCTION SWITCH AND PRESET SWITCH SELF-DIAGNOSIS FUNCTION
The ON/OFF operation (continuity) of each switch in the multifunction switch and preset switch can be checked.

Self-diagnosis Mode
- Press the "BACK" switch and the "UP" switch of the 4-direction switches within 10 seconds after turning the ignition switch from





OFF to ACC and hold them for 3 seconds or more. The buzzer sounds, all indicators of the preset switch illuminate, and the self-diagnosis mode starts.
- The continuity of each switch in the ON position can be checked by pressing the switch. The buzzer sounds if the switch is normal.

NOTE:
The hazard switch and disk eject switch cannot be checked.

Finishing Self-diagnosis Mode
Self-diagnosis mode is canceled when turning the ignition switch OFF.

MULTI AV SYSTEM ON BOARD DIAGNOSIS FUNCTION
- The AV control unit diagnosis function starts up with multifunction switch operation and AV control unit performs a diagnosis for each unit in the system during the on board diagnosis.
- Perform a CONSULT-III diagnosis if the on board diagnosis does not start, e.g., the screen does not display anything, multifunction switch does not function, etc.

ON BOARD DIAGNOSIS

Description
- The trouble diagnosis function has a self-diagnosis mode for conducting trouble diagnosis automatically and a confirmation/adjustment mode for operating manually.
- Self-diagnosis mode performs AV control unit diagnosis and the connection diagnosis between each of the units that make up the system, and it indicates the results to 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 checking, modifying or adjusting generally requires human intervention and judgment (the system cannot make judgment automatically).

On Board Diagnosis Item






STARTING PROCEDURE
1. Start the engine.
2. Turn the audio system OFF.





3. While pressing the "SETTING" button, turn the volume control dial clockwise or counterclockwise for 40 clicks or more. (When the self-diagnosis mode starts, a short beep will sound.)
- Shifting from the current screen to the previous screen is performed by pressing the "BACK" button.





4. The trouble diagnosis initial screen is displayed, and then the items of "Self Diagnosis" and "Confirmation/Adjustment" can be selected.

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 the progress of the trouble 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.

Diagnosis results Unit Connection line
Normal Green Green
Connection malfunction Gray Yellow
Unit malfunction (Note) Red Green

- 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 through gray.





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

SELF-DIAGNOSIS RESULTS
- 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 AV control unit.
- Because the start condition of the diagnosis function is a switch operation, the on board diagnosis function cannot be started up if any malfunction is detected in the communication circuit between AV control unit and the multifunction switch.
- Check the applicable display in following table, and then repair the malfunctioning parts.

Self-diagnosis Result Chart

Self-Diagnosis Result Chart (Part 1):

Self-Diagnosis Result Chart (Part 2):

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 "RETURN" switch to return to the initial Confirmation/Adjustment Mode screen.

Display Diagnosis





The tint of the color bar indication is as per the following list if a RGB signal error is detected.

R (red) signal error : Light blue (Cyan) tint
G (green) signal error : Purple (Magenta) tint
B (blue) signal error : Yellow tint


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











Speaker Test
Select "SPEAKER DIAGNOSIS" to display the Speaker Diagnosis screen. Press "START and NEXT" to generate a test tone in a speaker. Press "Start" to generate a test tone in the next speaker.





Press "End" to stop the test tones.

NOTE:
The frequency of test tone emitted from each speaker is as follows.

Tweeter* : 3 kHz
Front speaker : 300 Hz
Rear speaker : 1 kHz
*: Squawker

Climate Control
Refer to "HEATER and 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 condition.
Count up method A
- The counter resets to 0 if an error occurs when the ignition switch is turned ON. The counter increases by 1 if the condition is normal at the 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-III.
Count up method B
- The counter increases by 1 if an error occurs when the ignition 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-III.










Error item
Error items may be displayed simultaneously according to the cause. If error items are displayed simultaneously, the cause can be detected by the combination of display items.
















Vehicle CAN Diagnosis
- CAN communication status and error counter is displayed.





- The error counter displays "OK" if a 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.










- Displays the communication status between AV control unit (master unit) and each unit.
- 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.






Camera Cont.
The two functions of "Connection Confirmation" and "Adjust Offset of Rear View Camera" are available.
CONNECTION CONFIRMATION





The steering angle sensor, reverse signal and vehicle speed sensor can be inspected.





ADJUST OFFSET OF REAR VIEW CAMERA





Use this mode to adjust the guide line display position of the rear view monitor if necessary after removing the rear view monitor camera.

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






Initialize Settings
Initializes AV control unit memory.