Lexus IS250 · Service Manual BODY ELECTRICAL

DTC CHECK / CLEAR

Troubleshooting

HINT:
  1. 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.
  2. If the system cannot enter the diagnostic mode, inspect all AVC-LAN communication components and repair or replace problem parts.
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  3. After the engine switch is turned on (IG), check that the map is displayed before starting the diagnostic mode. Otherwise, some items cannot be checked.


START DIAGNOSTIC MODE

  1. There are 2 methods to start diagnostic mode. Start the mode by using one of them.

  2. E124055E01
    Method 1

    1. Start the engine.

    2. While pressing and holding the "INFO" switch, operate the light control switch: OFF → Turn ON → Turn OFF → Turn ON → Turn OFF → Turn ON → Turn OFF.

    3. The diagnostic mode starts and the "System Check Mode" screen will be displayed. Service inspection starts automatically and the result will be displayed.

  3. E109432
    Method 2

    1. Start the engine.

    2. Switch to the "Display Check" screen.

    3. From the display quality adjustment screen, touch the corners of the screen in the following order: upper left → lower left → upper left → lower left → upper left → lower left.

    4. The diagnostic mode starts and the "System Check Mode" screen will be displayed. Service inspection starts automatically and the result will be displayed.


FINISH DIAGNOSTIC MODE

  1. There are 2 methods to end diagnostic mode. Use one of them.

    1. Turn the engine switch off.

    2. Press and hold the "DISP" switch for 3 seconds.


DIAGNOSIS MENU

  1. E120083
    The "Diagnosis MENU" screen will be displayed by pressing the menu switch on the "System Check Mode" screen.


CHECK DTC

  1. E111721E02
    Read the system check result.

    1. If the check result is "EXCH", "CHEK" or "Old", touch the displayed check result to view the results on the "Unit Check Mode" screen and record them.

      HINT:
      1. If all check results are "OK", go to communication DTC check.
      2. If a device name is not known, its physical address is displayed.

      HINT:
      When proceeding to view the results of another device, press the service switch to return to the "System Check Mode" screen. Repeat this step.

  2. I038208E05
    Read the communication diagnostic check result.

    1. Return to the "System Check Mode" screen, and press the "LAN Mon" switch to enter the "LAN Monitor" screen.

    2. E120084E01
      If the check result is "CHEK" or "Old", touch the displayed check result to view the results on the individual communication diagnostic screen and record them.

      HINT:
      1. If all check results are "No Err", the system judges that no DTC exists.
      2. The sub-code (relevant device) will be indicated by its physical address.
      3. When proceeding to view the results of another device, press the "Service" switch to return to the original "LAN Monitor" screen. Repeat this step.


DTC CLEAR/RECHECK

  1. I038211E02
    Clear DTC

    1. Press the "Code CLR" switch for 3 seconds.

    2. The check results are cleared.

  2. I038212E01
    Recheck

    1. Press the "Recheck" switch.

    2. I038213E01
      Confirm that all diagnostic codes are "OK" when the check results are displayed. If a code other than "OK" is displayed, troubleshoot again.

    3. I038213E02
      Press the "LAN Mon" switch to change to the "LAN Monitor" screen.

    4. I038214E01
      Confirm that all diagnostic codes are "No Err". If a code other than "No Err" is displayed, troubleshoot again.

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