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.

ART 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: Identifying "INFO" Switch
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Method 2
  1. Start the engine.
  2. Press the "DISP" switch.
    
    Fig 2: Identifying "DISP" Switch
    Courtesy 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
    Courtesy 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.
FINISH DIAGNOSTIC MODE
1. Use one of the following 2 methods to finish the diagnostic mode.
  1. Turn the engine switch off.
  2. Press and hold the "DISP" switch for 3 seconds.
CHECK DTC
HINT:

Illustrations may differ from the actual vehicle depending on the device setting and options.
1. Start the diagnostic mode.
  
  Fig 4: Identifying "System Check Mode" Display Screen
  Courtesy 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
      Courtesy 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
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. If the result is "CHECK" 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.
CLEAR/RECHECK DTC
HINT:

Illustrations may differ from the actual vehicle depending on the device setting and options.
1. Start the diagnostic mode.
  
  Fig 7: Identifying "LAN Monitor" Display Screen
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Clear DTC.
  1. Press the Code CLR for 3 seconds.
  2. DTC is cleared.
    
    Fig 8: Clearing DTC Display Screen
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Recheck DTC.
  1. Press Recheck.
    
    Fig 9: Recheck DTC Display Screen
    Courtesy 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
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Press "LAN Mon" to enter the "LAN Monitor" screen.
    
    Fig 11: Identifying "LAN Mon" Display Screen
    Courtesy 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 "No Err" Display Screen
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002