DTC Check / Clear

WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.

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.
If the system cannot enter the diagnosis mode, inspect all AVC-LAN communication signals and repair or replace problem parts.
(See WIRING DIAGRAM )
After the ignition switch is turned on, 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. Method 1
  1. READY-on state.
  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.
    
    Fig 1: Identifying INFO Switch
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Method 2
  1. READY-on state.
  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 ignition switch off.
  2. Press and hold the "DISP" switch for 3 seconds.
    
    Fig 2: Display - Screen
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
DIAGNOSIS MENU
1. The "Diagnosis MENU" screen will be displayed by pressing the menu switch on the "System Check Mode" screen.
  
  Fig 3: Display Diagnosis MENU - System Check Mode
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
CHECK DTC
1. 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:
    - If all check results are "OK", go to communication DTC check.
    - 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.
    
    Fig 4: Display - System Check Mode
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. 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.
    
    Fig 5: Display System Check Mode - LAN Monitor
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. 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.
    
    Fig 6: Display - LAN Monitor
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    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.
    - 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. Clear DTC
  1. Press the "Code CLR" switch for 3 seconds.
  2. The check results are cleared.
    
    Fig 7: System Check Mode Display Code CLA
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Recheck
  1. Press the "Recheck" switch.
    
    Fig 8: System Check Mode Display Recheck
    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, troubleshoot again.
    
    Fig 9: System Check Mode Display OK
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Press the "LAN Mon" switch to change to the "LAN Monitor" screen.
    
    Fig 10: System Check Mode Display LAN Monitor
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Confirm that all diagnostic codes are "No Err". If a code other than "No Err" is displayed, troubleshoot again.
    
    Fig 11: Display - LAN Monitor No Err
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002