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DTC Check / Clear

WARNING: This page is about a different car, the 2010 Lexus GS 450h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC (CHECK USING TECHSTREAM) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Navigation System / Trouble Codes.
    5. Check for DTC(s) and freeze frame data, and then write them down.
    6. Check the details of the DTC(s). Refer to DIAGNOSTIC TROUBLE CODE CHART .
      NOTE:

      The electro multi vision system outputs DTCs for the following system. When DTCs other than those in Diagnostic Trouble Code Chart for the electro multi vision system are output, refer to Diagnostic Trouble Code Chart for the relevant system.

      System Proceed to
      Audio and visual system Refer to DIAGNOSTIC TROUBLE CODE CHART
  2. CLEAR DTC (CLEAR USING TECHSTREAM) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Navigation System / Trouble Codes.
    5. Clear DTCs.
  3. START DIAGNOSTIC MODE 

    HINT: 

    • Illustrations may differ from the actual vehicle screen depending on the device settings and options. Therefore, some detailed areas may not be shown exactly the same as on the actual vehicle screen.
    • To help find the malfunction when the system can not change to diagnostic mode, check for DTCs using the Techstream.
    • After the power switch is turned on (IG), check that a normal screen is displayed before starting diagnostic mode. Otherwise, some items cannot be checked.
    1. There are 2 methods to start diagnostic mode. Start the mode by using one of them.
    2. Method 1
      Fig 1: Identifying Start Diagnostic Mode (Method 1)
      GTY287499Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Start the hybrid system.
      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.
    3. Method 2
      1. Start the hybrid system.
      2. Press the "DISP" switch.
        Fig 2: Identifying Start Diagnostic Mode (Method 2)
        GTY273057Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. From the display quality adjustment screen, touch the upper and lower left corners of the screen in the following pattern: Upper left → Lower left → Upper left → Lower left → Upper left → Lower left.
        Fig 3: Identifying Start Diagnostic Mode (Method 2)
        GTY270738Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Diagnostic mode starts and the "System Check Mode" screen will be displayed. Service inspection starts automatically and the result will be displayed.
  4. FINISH DIAGNOSTIC MODE 
    1. Turn the power switch off.
  5. FAILURE DIAGNOSIS 
    1. The "Failure Diagnosis" screen is displayed when the "Failure Diagnosis" switch on the "Service Menu" screen is selected.
      Fig 4: Screen Display - Service Menu
      GTY273176Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. SYSTEM CHECK 
    1. The "System Check Mode" screen is displayed when the "System Check" switch on the "Failure Diagnosis" screen is selected.
      Fig 5: Screen Display - Failure Diagnosis
      GTY260161Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. CHECK DTC (CHECK USING SYSTEM CHECK MODE SCREEN) 

    HINT: 

    Refer to Diagnosis Display Detailed Description for further details on the "System Check Mode" screen. Refer to SYSTEM DESCRIPTION .

    1. Read the system check result.
      Fig 6: Screen Display - System Check Mode
      GTY270473Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. When the result is "EXCH" or "CHEK", select the icon which displays the result, and check and record each DTC displayed on the "Unit Check Mode" screen.
        NOTE:

        A maximum of 6 DTCs can be displayed by the display and navigation module display. When more than 6 DTCs are expected, check DTCs using the Techstream.

        HINT: 

        • Refer to Diagnosis Display Detailed Description for further details on the "System Check Mode" screen. Refer to SYSTEM DESCRIPTION .
        • When all results are "OK", this means that no DTCs are present.
        • When "MOST" is displayed for the result, selecting "MOST" displays the "MOST Line Check" screen and performs the MOST line check.
        • Changing to the "MOST Line Check" screen is possible only when the MOST network is malfunctioning and "MOST" is displayed for the result.
        • If the MOST network had a malfunction in the past, the DTCs will be displayed in the Memory column.
        • Refer to Diagnosis Display Detailed Description for further details on the "MOST Line Check" screen. Refer to SYSTEM DESCRIPTION .
        • When "NCON" is displayed for all devices connected using the AVC-LAN, or when all device names are not displayed, check if there is a short circuit in the AVC-LAN or devices connected to the AVC-LAN. Repair or replace parts as necessary. Refer to AVC-LAN Circuit .
        • When proceeding to view the results of another device, press the "Back" switch to return to the "System Check Mode" screen. Repeat the step above to view the results of other devices.
      2. Check the details of the DTC(s). Refer to DIAGNOSTIC TROUBLE CODE CHART .
        NOTE:

        The electro multi vision system outputs DTCs for the following system. When DTCs other than the codes in Diagnostic Trouble Code Chart for the electro multi vision system are output, refer to Diagnostic Trouble Code Chart for the relevant system.

        System Proceed to
        Audio and visual system Refer to DIAGNOSTIC TROUBLE CODE CHART
  8. DTC CLEAR/RECHECK (CLEAR USING SYSTEM CHECK MODE SCREEN) 
    1. Clear DTC
      Fig 7: Screen Display - System Check Mode
      GTY257989Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Press the "Memory CLR" switch for 3 seconds.
      2. The check results are cleared.

        HINT: 

        • To clear the DTC for a specific device, clear the DTC using the "Unit Check Mode" screen.
        • When clearing a DTC using the "Unit Check Mode" screen, press the "Code CLR" switch for 3 seconds.
    2. Recheck
      Fig 8: Screen Display - System Check Mode
      GTY257319Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Press the "Recheck" switch.
      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: Screen Display - System Check Mode
        GTY257495Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT: 

        When a DTC was cleared using the "Unit Check Mode" screen, press the "Back" switch to return to the "System Check Mode" screen and perform this operation.

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