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Precaution [02/2019 - ]

WARNING: This page is about a different variant/trim than selected.
  1. PRECAUTIONS FOR INSPECTING HYBRID CONTROL SYSTEM 
    1. Before the following operations are conducted, take precautions to prevent electric shock by turning the ignition switch off, wearing insulated gloves, and removing the service plug grip from HV battery.
      • Inspecting the high-voltage system
      • Disconnecting the low voltage connector of the inverter with converter assembly
      • Disconnecting the low voltage connector of the HV battery
      Fig 1: Wear Insulated Gloves
      GTY588386Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 2: Disconnecting Cable From Negative Auxiliary Battery Terminal
      GTY742514Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:
      • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

        Refer to PRECAUTION [11/2018 - ]

      • After removing the service plug grip, turning the ignition switch to ON (READY) may cause a malfunction. Do not turn the ignition switch to ON (READY) unless instructed by the repair Service Information.
    2. To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
      Fig 3: Do Not Service The Vehicle Before Cutting Of The High-Voltage Circuit
      GTY687067Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
      Fig 4: Do Not Leave Service Plug Grip Accessible To Other Technicians
      GTY703958Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.

      HINT: 

      Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

      Fig 5: Do Not Service Vehicle Before Waiting At Least 10 Minutes After Discharging High Voltage Capacitor
      GTY698431Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Without waiting for 10 minutes
    5. Check the voltage at the terminals in the inspection point of the inverter with converter assembly.
      WARNING:

      Be sure to wear insulated gloves.

      1. Remove the connector cover assembly from the inverter with converter assembly.

        Refer to PROCEDURE - Step 10 [02/2019 - 10/2019] , or refer to PROCEDURE - Step 10 [10/2019 - 06/2020] , or refer to PROCEDURE - Step 9 [06/2020 - 08/2020] , or refer to PROCEDURE - Step 9 [08/2020 - 12/2021] , or refer to PROCEDURE - Step 9 [12/2021 - 10/2022] , or refer to PROCEDURE - Step 9 [10/2022 - 10/2023] , or refer to PROCEDURE - Step 9 [10/2023 - ]

        GTY942209Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        NOTE:
        • Do not touch the connector cover assembly waterproof seal.
        • Do not allow any foreign matter or water to enter the inverter with converter assembly.
      2. Measure the voltage according to the value(s) in the table below.
        GTY910876Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard Voltage

        Tester Connection Condition Specified Condition
        Inspection point At least 10 minutes after removing the service plug grip 0 V

        HINT: 

        Make sure to set the tester to DC750 V or more when measuring the voltage.

      3. Reinstall the connector cover assembly.
    6. w/ Smart Key System:

      When turning the power switch ON during an inspection, do not press the power switch while depressing the brake pedal.

      WARNING:

      Pressing the power switch with the brake pedal depressed causes the system to enter the READY-on state. This is very dangerous because high voltage may be applied to the inspection area.

      Fig 6: Do Not Service The Vehicle Before Disconnecting The Negative Battery Terminal
      GTY734749Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. w/o Smart Key System:

      When turning the ignition switch to ON during inspections, do not turn the ignition switch to START.

      WARNING:

      Turning the ignition switch to START causes the system to enter the READY-on state. This is very dangerous because high voltage may be applied to the inspection area.

      GTY926845Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Turn the ignition switch off, disconnect the cable from the negative (-) terminal of the auxiliary battery and put on insulated gloves before touching any of the orange-colored wire harnesses and connectors of the high-voltage system.
      NOTE:

      After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

      Refer to PRECAUTION [11/2018 - ]

    9. Turn the ignition switch off before performing any resistance checks.
    10. Turn the ignition switch off before disconnecting or reconnecting any connectors.
    11. When performing work involving high-voltage wires, use either a tool wrapped with vinyl insulating tape or an insulated tool.
    12. When high-voltage connectors are removed, wrap the connectors with insulation tape to prevent them from contacting foreign matter.
  2. NOTICE FOR HYBRID CONTROL SYSTEM ACTIVATION 
    1. When the warning is illuminated, or the auxiliary battery has been disconnected and reconnected, attempting to turn the ignition switch to ON (READY) may not start the system (the system may not enter the READY-on state) on the first attempt. If so, turn the ignition switch off and reattempt to start the hybrid system.
      NOTE:

      After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

      Refer to PRECAUTION [11/2018 - ]

  3. PRECAUTIONS WHEN REPLACING HYBRID VEHICLE CONTROL ECU ASSEMBLY 
    NOTE:

    Before replacing the hybrid vehicle control ECU assembly, refer to Registration.

    Refer to REGISTRATION [11/2018 - 10/2019] , or refer to REGISTRATION [10/2019 - 12/2021] , or refer to REGISTRATION [12/2021 - ]

  4. PRECAUTIONS FOR DISCONNECTING AND RECONNECTING CABLE TO NEGATIVE (-) AUXILIARY BATTERY TERMINAL 
    Fig 7: Disconnecting Cable From Negative (-) Battery Terminal
    GTY371121Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *1 Cable
    *2 Negative (-) Auxiliary Battery Terminal
    1. Before performing work on electronic components, disconnect the cable from the negative (-) auxiliary battery terminal to prevent damage to the electrical system or electrical components.
    2. Before disconnecting and reconnecting the auxiliary battery cable, turn the ignition switch off and the headlight switch off. Then loosen the terminal nut completely. Do not damage the cable or terminal.
    3. When the auxiliary battery cable is disconnected, the clock and radio settings and stored DTCs are cleared. Therefore, before disconnecting the auxiliary battery cable, make a note of them.
      NOTE:
      • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

        Refer to PRECAUTION [11/2018 - ]

      • When the cable is disconnected from the negative (-) auxiliary battery terminal, initialize the following systems after the cable is reconnected.
      System Name See Procedure
      Lane control System Refer to INITIALIZATION [02/2019 - 10/2019] , or refer to INITIALIZATION [10/2019 - 06/2020] , or refer to INITIALIZATION [06/2020 - 08/2020] , or refer to INITIALIZATION [08/2020 - 12/2021] , or refer to INITIALIZATION [12/2021 - 10/2022] , or refer to INITIALIZATION [10/2022 - 10/2023] , or refer to INITIALIZATION [10/2023 - ]
      Parking support brake system
      Pre-collision System
      Lighting system (EXT) (w/ AFS)
      Parking assist monitor system
      Panoramic view monitor system
      Power back door system
      Power door lock control system
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