System Check Mode (DTC Check)

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.

1. Start the diagnostic mode (see  DIAGNOSTIC START-UP/FINISH  ). 
2. Read the system check result. 
   1. Press the "SEEK TRACK"/"SEEK" switch to see the check result of each component.
   2. The component device code (physical address) is displayed first, and then the check result follows.

      HINT:

      • If all check results are "good", the system judges that no DTC exists.
        Fig 1: Displaying Check Results

        Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Check Result Display
      CHECK RESULT DISPLAY
      
      

      Display	Original Language	Meaning	Action to be taken
      GOOD	Good (normal)	No DTCs are detected in both "System Check Mode" and "Diagnostic Memory Mode".	-
      NCON	No connection	The system recognized the component when it was registered, but the component gives no response to the "Diagnostic Mode ON Request".	Check the power source circuit and the communication circuit of the component indicated by the component code (physical address).
      ECHN	Exchange	One or more DTCs for "Exchange" are detected in either "System Check Mode" or "Diagnostic Memory Mode".	Go to the detailed information mode to check the trouble area referring to the DTC list.
      CHEC	Check	When no DTCs are detected for "Exchange", one or more DTCs for "Check" are detected in either "System Check Mode" or "Diagnostic Memory Mode".	Go to the detailed information mode to check the trouble area referring to the DTC list.
      OLD	Old version	Old DTC application is identified and DTC is detected in either "System Check Mode" or "Diagnostic Memory Mode".	-
      NRES	No response	The device gives no response to any one of "System Check Mode ON Request", "System Check Result Request" and "Diagnostic Memory Request".	Check the power source circuit and the communication circuit of the component indicated by the component code (physical address).

3. Detailed information mode (when displaying the DTC for a trouble component) 
   1. With "CHEC" or "ECHN" being displayed, press the preset switch "2" to go to the detailed information mode.
   2. Press the "SEEK TRACK"/"SEEK" switch to display the "System check result (SYS)" and "Diagnostic memory response (CODE)".
      Fig 2: Displaying Check" Or "Echn

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 3: Displaying System Check Mode And Detailed Information Mode

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Displayed Items in Detailed Information Mode
      DISPLAYED ITEMS IN DETAILED INFORMATION MODE
      
      

      Division Code for DTC display	Meaning	The order of detailed information displayed when the "TUNE UP" switch is pressed. (The order is reversed when the "TUNE DOWN" switch is pressed.)
      SYS	System check result is displayed.	Logical address -->
      SYS	System check result is displayed.	DTC
      CODE	Diagnostic memory check result is displayed.	Logical address -->
      CODE	Diagnostic memory check result is displayed.	DTC -->
      CODE	Diagnostic memory check result is displayed.	Sub code -->
      CODE	Diagnostic memory check result is displayed.	Connection confirmation number -->
      CODE	Diagnostic memory check result is displayed.	The number of times of occurrence

   4. Check the trouble area referring to the DTC list.
   5. To return to the service check mode, press the preset switch "3".