DTC Check/Clear

HINT:

• Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore, some detailed areas may not be exactly the same as on the actual vehicle.
• If the system cannot enter the diagnostic mode, inspect all AVC-LAN communication components and repair or replace problem parts (see AVC-LAN CIRCUIT  ).
• After the engine switch is turned on (IG), check that the map is displayed before starting the diagnostic mode. Otherwise, some items cannot be checked.

1. START DIAGNOSTIC MODE 
   1. Turn the engine switch on (ACC).
   2. Press the "DISP" switch.
      Fig 1: Locating "DISP" Switch

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   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.
2. FINISH DIAGNOSTIC MODE 
   1. Turn the engine switch off.
      Fig 2: Screen Display - Quality Adjustment

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3. DIAGNOSIS MENU 
   1. The "Diagnosis MENU" screen will be displayed by pressing the menu switch on the "System Check Mode" screen.
      Fig 3: Screen Display - System Check Mode

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4. 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 the DTC CHECK/CLEAR .
         • 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 - Logical Address And Diagnostic Code

           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: Screen Display - Communication Diagnostic Check Result

         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.

         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.
           Fig 6: Display - LAN Monitor Screen

           Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. DTC CLEAR/RECHECK 
   1. Clear DTC
      1. Press the "Code CLR" switch for 3 seconds.
      2. The check results are cleared.
         Fig 7: Screen Display - System Check Mode

         Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Recheck
      1. Press the "Recheck" switch.
         Fig 8: Screen Display - Recheck

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      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: Locating Diagnostic Codes In OK Condition

         Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Press the "LAN Mon" switch to change to the "LAN Monitor" screen.
         Fig 10: Screen Display - "LAN Mon"

         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.