MOTOR GENERATOR CONTROL SYSTEM PRECAUTION


  1. PRECAUTIONS FOR INSPECTING HYBRID CONTROL SYSTEM


    1. Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shock. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally installing it while you are working on the high-voltage system.

      Note


      • After turning the power 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.

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      • After removing the service plug grip, turning the power switch on (READY) may cause a malfunction. Do not turn the power switch on (READY) unless instructed by the repair manual.

    2. After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.

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      Tech Tips

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

    3. Check the voltage at the terminals in the inspection point of the inverter with converter assembly.

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      CAUTION:

      Be sure to wear insulated gloves.


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

        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.

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        Measure the voltage according to the value(s) in the table below.

        Tech Tips

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

      3. Reinstall the connector cover assembly.

      4. When turning the power switch on (IG) during an inspection, do not press the power switch while depressing the brake pedal.

        CAUTION:

        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.

      5. Turn the power 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 power 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.

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      6. Turn the power switch off before performing any resistance checks.

      7. Turn the power switch off before disconnecting or reconnecting any connectors.

      8. When performing work involving high-voltage wires, use either a tool wrapped with vinyl insulating tape or an insulated tool.

      9. When high-voltage connectors are removed, wrap the connectors with vinyl insulating tape to prevent foreign matter or water from entering them.

      10. NOTICE FOR HYBRID CONTROL SYSTEM ACTIVATION


        1. When the master warning light is illuminated, or the auxiliary battery has been disconnected and reconnected, the hybrid control system may not start on the first attempt to turn the power switch on (READY) (the system may not enter the READY-on state). In this case, turn the power switch off and then attempt to start the hybrid system again.

          Note

          After turning the power 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.

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      11. PRECAUTIONS FOR DISCONNECTING AMD TERMINAL

        Tech Tips

        The AMD terminal is connected to the positive (+) terminal of the auxiliary battery. To prevent damage when disconnecting the AMD terminal, perform the following procedures.


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        12. *1 AMD Terminal (Inverter with Converter Assembly Side)
        *2 AMD Terminal (Fusible Link Assembly Side)

    Be sure to disconnect the cable from the negative (-) auxiliary battery terminal before disconnecting the AMD terminal from the fusible link assembly.

    Note

    After turning the power 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.

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  2. After disconnecting the AMD terminal, wrap it with vinyl insulating tape.

  3. Be sure to reconnect the AMD terminal to the fusible link assembly before reconnecting the cable to the negative (-) terminal of the auxiliary battery.

    Note

    A short to ground may occur if the AMD terminal is disconnected before the cable is disconnected from the negative (-) auxiliary battery terminal. If a short to ground occurs, a fusible link or fuse may break.

  • PRECAUTION FOR DISPOSING OF AN HV BATTERY


    1. When disposing of an HV battery, make sure to return it through an authorized collection agent who is capable of handling it safely. If the HV battery is returned via the manufacturer specified route, it will be returned properly and in a safe manner by an authorized collection agent.

      CAUTION:


      • Accidents such as electric shock may result if the HV battery is disposed of improperly or abandoned. Therefore, make sure to return all HV batteries through an authorized collection agent.

      • After removing the HV battery, keep it away from water. Exposure to water may cause the HV battery to produce heat, resulting in a fire.

  • PRECAUTIONS FOR DISCONNECTING AND RECONNECTING CABLE TO NEGATIVE (-) AUXILIARY BATTERY TERMINAL

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    *1 Cable
    *2 Negative (-) 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 cable from the negative (-) auxiliary battery terminal, turn the power switch off and the headlight switch off. Then loosen the terminal nut completely. Do not damage the cable or terminal.

    3. When a cable is disconnected from the negative (-) auxiliary battery terminal, the clock and radio settings and stored DTCs will be cleared. Therefore, before disconnecting the cable, make a note of them.

      Note

      After turning the power 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.

      Note


      • After turning the power 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.

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      • 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 departure alert system (w/ Steering Control System)

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        Pre-collision system
        Intelligent clearance sonar system
        Simple advanced parking guidance system
        Power door lock control system