Lexus IS250 IS220d GSE20 ALE20 - AUDIO / VISUAL
AUDIO AND VISUAL SYSTEM - DTC CHECK / CLEAR
- HINT:
- If the system cannot enter the diagnostic mode, inspect all AVC-LAN communication signals and repair or replace problem parts.
| ENTERING DIAGNOSTIC MODE |
Turn the engine switch on (ACC).
Turn off the audio system.
While pressing the preset switches "1" and "6" at the same time, press the "DISC" switch 3 times.
- HINT:
- A beep is emitted 3 times and the diagnostic function is activated. The system enters the all element illumination mode and the switch check mode.
| ALL ELEMENT ILLUMINATION MODE AND SWITCH CHECK MODE |
- HINT:
- Illumination status of all switches and operations of the panel switches can be checked.
Check that all elements are on.
When pressing each panel switch, check that a beep is emitted.
- NOTICE:
- Pressing the "SEEK TRACK UP" switch transfers the screen to the stereo jack adapter connection check screen. Check the operation of this switch by confirming the transfer of the screen.
| STEREO JACK ADAPTER CONNECTION CHECK MODE |
Press the "SEEK TRACK UP" switch.
Check if the stereo jack adapter is recognized.
- HINT:
- Vehicles that do not have a stereo jack adapter also have this function.
- NOTICE:
- This function is not to check connection information on an external device, but to check recognition information on a stereo jack adapter.
| SERVICE CHECK MODE |
Press the "SEEK TRACK UP" switch.
- HINT:
- For details of the service check mode, refer to "6. CHECK DTC" and "7. DTC CLEAR/RECHECK".
| FINISHING DIAGNOSTIC MODE |
Press the "DISC" switch for 2 seconds or more, or turn the ignition switch off.
| CHECK DTC |
- HINT:
- Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore, some detailed areas may not be shown exactly the same as on the actual vehicle.
Reference:
In the system check mode, the system check and the diagnostic memory check are performed, and the check results are displayed in ascending order of the component codes (physical address).
| Terms | Meaning |
| Component code (Physical address) | Three-digit code (in hexadecimal) given to each device comprising AVC-LAN. Corresponding to its function, individual symbol is provided. |
| Logical address | Two-digit code (in hexadecimal) given to each function and device unit in each device comprising AVC-LAN. |
Service check result display
| Display | Previous term | Meaning | Action to be taken |
| good | Good (normal) | No DTCs are detected in both "System Check Mode" and "Diagnostic Memory Mode". | - |
| nCon | No connection | The system recognized the component when it was registered, but the component gives no response to the "Diagnostic Mode ON Request". | Check the power source circuit and the communication circuit of the component indicated by the component code (physical address). |
| ECHn | Exchange | One or more DTCs for "Exchange" are detected in either "System Check Mode" or "Diagnostic Memory Mode". | Go to the detailed information mode to check the trouble area referring to the DTC list. |
| CHEC | Check | When no DTCs are detected for "Exchange", one or more DTCs for "Check" are detected in either "System Check Mode" or "Diagnostic Memory Mode". | Go to the detailed information mode to check the trouble area referring to the DTC list. |
| OLd | Old version | Old DTC application is identified and DTC is detected in either "System Check Mode" or "Diagnostic Memory Mode". | - |
| nrES | No response | The device gives no response to any one of "System Check Mode ON Request", "System Check Result Request", and "Diagnostic Memory Request". | Check the power source circuit and the communication circuit of the component indicated by the component code (physical address). |
Device name and physical address
| Physical address No. | Name |
| 190 | Radio receiver |
| 440 | Stereo component amplifier |
| 1C6 | Gateway ECU |
| 1D8 | Integration control & panel assembly |
Service check mode
Press the "SEEK TRACK" switch to see the check result of each component.
The component code (physical address) is displayed first, and then the check result follows.
- HINT:
Detailed information mode 1
- HINT:
Press the preset switch "2" to go to the "Detailed Information Mode 1".
Press the "SEEK TRACK" switch to display the physical address and DTC of the component.
Press the preset switch "3" to go to the "Service Check Mode".
Distinguish between the displays of the responses to "System Check Result Request" and "Diagnostic Memory Request". In order to distinguish the information detected in "System Check Mode" and "Diagnostic Memory Mode" in "ECHn", "CHEC", and "OLd" in "Detailed Information Mode 1", refer to the following:
- HINT:
Detailed information mode 2
- HINT:
Press the preset switch "2" to go to the "Detailed Information Mode 2".
Press the "SEEK TRACK" switch to display the physical address and DTC of the component.
Press the preset switch "3" to go to the "Service Check Mode".
Distinguish between the displays of the responses to "System Check Result Request" and "Diagnostic Memory Request". In order to distinguish the information detected in "System Check Mode" and "Diagnostic Memory Mode" in "ECHn", "CHEC", and "OLd" in "Detailed Information Mode 2", refer to the following:
- HINT:
| DTC CLEAR/RECHECK |
Clearing All DTC Memory (when clearing all the memory of the DTCs previously detected).
When the preset switch "5" is pressed for 2 seconds or more during "Service Check Mode", the DTCs for all components are cleared. ("CLr" is displayed at this time.)
- HINT:
Clearing Individual DTC Memory (when clearing the memory of the DTC previously detected individually).
When the preset switch "5" is pressed for 2 seconds or more during "Detailed Information Mode 1" or "Detailed Information Mode 2", the DTCs for the target component are cleared.
- HINT:
Press the preset switch "1" to perform the service check again, and check that no DTCs are displayed for all the component codes (physical address).