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Update Ecu Security Key [11/2021 - ]

  1. UPDATE ECU SECURITY KEY 
    NOTE:
    • It is necessary to log in to the Toyota server to perform an ECU security key update.
    • Users other than Toyota dealers can log in with a guest account issued when an ECU is ordered.
    1. Enter the following menus: System Select / Health Check.
    2. Follow the prompts on the GTS screen to update the ECU security key.
      Fig 1: ECU Security Key: Necessary
      GTY969202Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a GTS Health Check Screen
      *b Perform ECU Security Key Update Icon
    3. Follow the on-screen instructions to select "Validation" and press "Next".
      GTY1146509Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. When replacing the central gateway ECU.
      GTY968724Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a GTS Health Check Screen
      *b "ECU Security Key: Necessary"
      1. Check whether "ECU Security Key: Necessary" is displayed in the upper right corner of the GTS screen.
    5. When replacing a target security key ECU other than the central gateway ECU.
      Fig 2: ECU Security Key
      GTY968724Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a GTS Health Check Screen
      *b "ECU Security Key: Refer to Repair Manual"
      1. Check whether "ECU Security Key: Refer to Repair Manual" is displayed in the upper right corner of the GTS screen.
    6. If "ECU Security Key: Necessary"*1 or "ECU Security Key: Refer to Repair Manual"*2 is displayed, follow the prompts on the GTS screen to update the ECU security key.
      Fig 3: ECU Security Key: Necessary
      GTY969202Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a GTS Health Check Screen
      *b Perform ECU Security Key Update Icon
      1. *1: When replacing the central gateway ECU.
      2. *2: When replacing a target security key ECU other than the central gateway ECU
    7. Follow the on-screen instructions to select "Update" and press "Next".
      GTY1141414Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. In accordance with the display on the GTS, press "OK".
      GTY1146205Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    9. Press the ECU Security Key Update Icon, and once again, select "Validation" then push "Next".
      GTY1146509Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    10. In accordance with the display on the GTS, press "OK".
      GTY1146207Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    11. After "Validation" is performed, enter the following menus: System Select / Health Check.
    12. Check that "ECU Security Key: Refer to Repair Manual" is displayed, and clear the vehicle control history (RoB).
      Fig 4: ECU Security Key
      GTY968574Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a GTS Health Check Screen
      *b "ECU Security Key: Refer to Repair Manual"

      HINT: 

      Although "ECU Security Key: Refer to Repair Manual" is displayed, if a message is displayed during "Update"*3 or "Validation"*4 , the ECU security key update is completed.

      1. *3: ECU Security Key Update is complete. Press OK.
      2. *4: ECU Security Key Validation is complete. Press OK.
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