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.

START DIAGNOSTIC MODE
1. There are 2 methods to start diagnostic mode. Start the mode by using one of them.
  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.
  - After the ignition switch is turned on, check that the map is displayed before starting the diagnostic mode. Otherwise, some items cannot be checked.
2. Method 1
  1. Turn the ignition switch on (Ready).
  2. While pressing and holding "INFO" switch, operate the light control switch, OFF -> TAIL -> OFF -> TAIL -> OFF -> TAIL -> OFF.
  3. The diagnostic mode starts and the service check screen ("System Check Mode") will be displayed. Service inspection starts automatically and the result will be displayed.
    
    Fig 1: Starting Diagnostic Mode - Method 1
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Method 2
  1. Turn the ignition switch on (Ready).
  2. Switch to the "Display quality adjustment" 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 "Service Check" screen will be displayed. Service inspection starts automatically and the result will be displayed.
    
    Fig 2: Starting Diagnostic Mode - Method 2
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Diagnosis MENU
  1. Diagnostic screen will be displayed by pressing the menu switch on the service check screen.
    
    Fig 3: Diagnosis MENU Screen
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Read the system check result.
  1. If all check results are "EXCH," "CHEK" or "Old," touch the display to check the contents on the "Unit Check Mode" screen and record them on the customer problem analysis check sheet.
    HINT:
    - If all check results are "OK," go to communication DTC check (go to step PROCEDURE 1).
    - If a device name is not known, its physical address is displayed.
      
      Fig 4: Checking Result Display Screen (1 Of 2)
      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. If "EXCH", "CHEK" and "Old" as well as "OK" exist, press the service switch to return to the "System Check Mode". Then, check the "Unit Check Mode" screen and record them on the customer problem analysis check sheet.
    
    Fig 5: Checking Result Display Screen (2 Of 2)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Read the communication diagnostic check result (PROCEDURE 1).
  1. Return to the "System Check Mode", and press "LAN Mon" switch to enter the LAN monitor screen.
    
    Fig 6: Checking Communication Diagnostic Result (1 Of 3)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. If the result is "CHEK" or "Old," touch the result switch to check the contents on the individual communication diagnostic screen and record them on the customer problem analysis check sheet.
    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.
      
      Fig 7: Checking Communication Diagnostic Result (1 Of 3)
      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. If check results of other devices are "CHEK," press the "Service" switch to return to the original "LAN Monitor" screen. Then, check the individual communication diagnostic screen for the next device and record the result on the customer problem analysis check sheet.
    
    Fig 8: Checking Communication Diagnostic Result (3 Of 3)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
FINISH DIAGNOSTIC MODE
1. There are 2 methods to end diagnostic mode.
2. Method 1
  1. Turn the ignition switch off.
3. Method 2
  1. Press and hold the "Display" switch for 3 seconds.
DTC CLEAR/RECHECK
1. Clear DTC
  1. Press the "Code CLR" switch for 3 seconds.
  2. Check result is cleared.
    
    Fig 9: Identifying "Code DTC" Switch
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Recheck
  1. Press the "Recheck" switch.
    
    Fig 10: Identifying "Recheck" Switch
    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 11: Identifying "OK" Screen
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Press the "LAN Mon" switch to change to "LAN Monitor" mode.
    
    Fig 12: Identifying "LAN Mon" Switch
    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 13: Identifying "No Err" Screen
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002