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DTC Check / Clear

WARNING: This page is about a different car, the 2006 Lexus GS 430 and 2006 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. START DIAGNOSTIC MODE 

    HINT:

    • Illustrations may differ from the actual vehicle depending on the device settings and options.
    • Turn the engine switch on (ACC), and then check that the map is displayed before starting the diagnostic mode. Otherwise, some items cannot be checked.
    1. There are 2 methods to start diagnostic mode.
    2. Method 1
      1. Start the engine.
      2. While pressing and holding the "INFO" switch, turn the light control switch as follows: TAIL --> OFF --> TAIL --> OFF --> TAIL --> 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.
        Fig 1: Locating "INFO" Switch
        G04022714Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Method 2
      1. Start the engine.
      2. Press the "DISP" switch.
        Fig 2: Locating "DISP" Switch
        G04022715Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. 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.
        Fig 3: Identifying Upper Left And Lower Left
        G04022716Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Diagnosis MENU
      1. The "Diagnostic MENU" screen will be displayed by pressing Menu on the "System Check Mode" screen.
  2. FINISH DIAGNOSTIC MODE 
    1. There are 2 methods to end diagnostic mode.
      1. Turn the engine switch off.
      2. Press and hold the "DISP" switch for 3 seconds.
  3. CHECK DTC 

    HINT:

    Illustrations may differ from the actual vehicle depending on the device settings and options.

    1. Start diagnostic mode.
      Fig 4: Identifying "System Check Mode" Display Screen
      G04022717Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Read the system check result.
      1. If the check result is "EXCH", "CHEK" or "Old", touch the display to check its contents.

        HINT:

        • If all check results are "OK", go to the communication DTC check.
        • If a device name is not known, its physical address is displayed.
        • To return to the "System Check Mode" screen, press Service.
          Fig 5: Identifying "System Check Mode" Display Screen
          G04022718Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Read the communication diagnostic check result.
      1. Return to the "System Check Mode" screen, and press LAN Mon to enter the "LAN Monitor" screen.
        Fig 6: Identifying "System Check Mode" Display Screen
        G04022719Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. If the check result is "CHEK" or "Old", touch the display to check its contents.

        HINT:

        • If all check results are "No Err", the system judges that no DTC exists.
        • The sub-code (relevant device) will be indicated by its physical address.
        • To return to the original "LAN Monitor" screen, press Service.
  4. CLEAR/RECHECK DTC 

    HINT:

    Illustrations may differ from the actual vehicle depending on the device settings and options.

    1. Start diagnostic mode.
      Fig 7: Identifying "LAN Monitor" Display Screen
      G04022720Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Clear DTC.
      1. Press Code CLR for 3 seconds.
      2. DTC is cleared.
        Fig 8: Locating Code CLR Switch
        G04022721Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Recheck DTC.
      1. Press Recheck.
        Fig 9: Locating Press Recheck Switch
        G04022722Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Confirm that all diagnostic codes are "OK" when the check results are displayed. If a code other than "OK" is displayed, perform troubleshooting again.
        Fig 10: Identifying "OK" Display Screen
        G04022723Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Press LAN Mon to change to the "LAN Monitor" screen.
        Fig 11: Locating LAN Mon Switch
        G04022724Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Confirm that all diagnostic codes are "No Err". If a code other than "No Err" is displayed, perform troubleshooting again.
        Fig 12: Identifying "LAN Monitor" Display Screen
        G04022725Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002