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DTC Check / Clear [08/2017 - 08/2019]

  1. CHECK DTC (CHECK USING TECHSTREAM) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Navigation System / Trouble Codes.
    5. Check for DTCs, and then write them down.
    6. Check the details of the DTC(s).
  2. CLEAR DTC (CLEAR USING TECHSTREAM) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Navigation System / Trouble Codes.
    5. Clear the 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.
    • After the ignition switch is turned to ON, check that the map is displayed before starting diagnostic mode. Otherwise, some items cannot be checked.
    1. Start the engine.
    2. While pressing and holding the "AUDIO" switch of the navigation receiver assembly, operate the light control switch: Off → Tail → Off → Tail → Off → Tail → Off.
    3. Diagnostic mode starts and the "Service Menu" screen will be displayed. Service inspection starts automatically and the result will be displayed.
      GTY561870Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. FAILURE DIAGNOSIS 
    1. The "Failure Diagnosis" screen will be displayed by pressing the "Failure Diagnosis" switch on the "Service Menu" screen.
      GTY435240Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. SYSTEM CHECK 
    1. The "System Check Mode" screen will be displayed by pressing the "System Check" switch on the "Failure Diagnosis" screen.
      GTY440558Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. CHECK DTC (CHECK USING SYSTEM CHECK MODE SCREEN) 

    HINT: 

    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 [08/2017 - 08/2019] ).

    1. System check mode screen description
      GTY432303Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      SCREEN DESCRIPTION

      Display Content
      *a: Device Name List No. 1
      • Device Name List No. 1 displays some of the devices that make up the navigation system.
      • The names of the components from Device Name List No. 1 are shown in the following table.
      *b: Check Result Result codes for all devices are displayed.
      *c: Memory Clear
      • Present and history DTCs and registered connected device names are cleared.
      • Press the "Memory CLR" switch for 3 seconds.
      *d: Recheck
      • A system check will be performed again after the memory is cleared.
      • The "Recheck" switch will dim during a system check.
      *e: Device Name List No. 2
      • Device Name List No. 2 displays some of the devices that make up the navigation system.
      • The names of the components from Device Name List No. 2 are shown in the following table.
      *A: DEVICE NAME LIST NO. 1 DESCRIPTION

      Name Component Connection Method
      AVN Navigation receiver assembly -
      REAR Television display assembly Communication line for AVC-LAN
      EXT BOX Stereo Replacement Component tuner assembly Communication line for LVDS
      DSP-AMP Stereo Replacement Component amplifier assembly Communication line for AVC-LAN
      *B: CHECK RESULT DESCRIPTION

      Result Meaning Action
      OK The device does not respond with a DTC. -
      DETAIL The device responds with a DTC. Look up the DTC in "Unit Check Mode".
      NCON The device was previously present, but does not respond in diagnostic mode. - Check power supply wire harness of the device.
      - Check the AVC-LAN of the device.
      NRES The device responds in diagnostic mode, but gives no DTC information. - Check power supply wire harness of the device.
      - Check the AVC-LAN of the device.
      *E: DEVICE NAME LIST NO. 2 DESCRIPTION

      Name Component Connection Method
      AUX/USB No. 1 stereo jack adapter assembly Vehicle wire harness
    2. Unit check mode screen description
      GTY587737Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      SCREEN DESCRIPTION

      Display Content
      *a: Device name Target device
      *b: History DTC Diagnostic memory results and stored DTCs are displayed.
      *c: Current DTC DTCs output in the service check are displayed.
      *d: DTC DTC (Diagnostic Trouble Code)
      *e: Timestamp The time and date of history DTCs are displayed. (The year is displayed in 2-digit format.)
      *f: Diagnosis clear switch Pushing this switch for 3 seconds clears the diagnostic memory data of the target device. (Both response to diagnostic system check result and the displayed data are cleared.)

      HINT: 

      • This screen is updated once per second.
      • A maximum of 6 DTCs can be displayed for history and present DTCs.
    3. Read the system check result.
      GTY441539Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. If the check result is "DETAIL", touch the displayed check result to view the results on the "Unit Check Mode" screen and record them.
        NOTE:

        A maximum of 6 DTCs can be displayed for history and present DTCs on the "Unit check mode" screen. Therefore, when 6 DTCs are displayed, troubleshoot those DTCs first and then check the "Unit check mode" screen again to see if any other DTCs are displayed.

        HINT: 

        • When all results are "OK", this means that no DTCs are output.
        • 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 [08/2017 - 08/2019] ).
  7. DTC CLEAR/RECHECK (CLEAR USING SYSTEM CHECK MODE SCREEN) 
    1. Clear DTCs
      GTY441537Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Press the "Memory CLR" switch for 3 seconds.
      2. Confirm that the check results are cleared.

        HINT: 

        • To clear the DTCs for a specific device, clear the DTCs using the "Unit Check Mode" screen.
        • When clearing the DTCs using the "Unit Check Mode" screen, press the "Code CLR" switch for 3 seconds.
    2. Recheck
      GTY441536Courtesy 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.
        GTY441538Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT: 

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

  8. FINISH DIAGNOSTIC MODE 
    1. Turn the ignition switch off.
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