HYBRID VEHICLE CONTROL ECU REMOVAL

PROCEDURE


  1. PRECAUTION

    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 Click here.

    • Before replacing the hybrid vehicle control ECU, refer to Service Bulletin.

  2. WHEN REPLACING HYBRID VEHICLE CONTROL ECU

    HV battery learning values are stored in the hybrid vehicle control ECU and ECM and are used to detect malfunctions and illuminate the hybrid battery indicator light in the combination meter assembly. When either of these ECUs is replaced, the new ECU receives the HV battery learning values from the other ECU and stores them.

    Note


    • Do not replace the hybrid vehicle control ECU and ECM at the same time as the HV battery learning values will be lost. However, if it is necessary to replace both ECUs at the same time, replace them by following the procedure below.

    • Do not replace the hybrid vehicle control ECU or ECM with a used one from another vehicle.


    1. Procedure when replacing both hybrid vehicle control ECU and ECM:


      1. Disconnect the cable from the negative (-) auxiliary battery terminal.

      2. Replace either ECU.

      3. Connect the cable to the negative (-) auxiliary battery terminal.

      4. Turn the power switch on (READY) and wait for 5 minutes or more.

      5. Turn the power switch off and disconnect the cable from the negative (-) auxiliary battery terminal.

      6. Replace the other ECU.

      7. Connect the cable to the negative (-) auxiliary battery terminal.

      8. Check that the power switch can be turned on (READY).

        Tech Tips

        If the hybrid vehicle control ECU and ECM are replaced at the same time without following the above procedure, replace either of the ECUs with its original one and then replace it again by following the above procedure. If the correct procedure is not followed, perform the procedure again from the beginning.

  3. REMOVE DECK BOARD ASSEMBLY

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  4. REMOVE NO. 1 DECK BOARD

    Click here

  5. REMOVE NO. 2 DECK BOARD

    Click here

  6. REMOVE REAR DECK FLOOR BOX

    Click here

  7. REMOVE DECK FLOOR BOX RH

    Click here

  8. DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL

    Note

    When disconnecting the cable, some systems need to be initialized after the cable is reconnected Click here.

  9. REMOVE NO. 2 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY

    Click here

  10. REMOVE GLOVE COMPARTMENT DOOR ASSEMBLY

    Click here

  11. REMOVE ECU INTEGRATION BOX RH (for LHD)


    1. Disconnect each connector.

    2. B005Y78

      Disengage the 3 clamps.

    3. Remove the bolt, 2 nuts and ECU integration box RH.

  12. REMOVE ECU INTEGRATION BOX LH (for RHD)


    1. Disconnect each connector.

    2. B005XDO

      Disengage the clamp.

    3. Remove the bolt, nut and ECU integration box LH.

  13. REMOVE HYBRID VEHICLE CONTROL ECU (for LHD)


    1. B005YTF

      Disengage the 2 claws and remove the hybrid vehicle control ECU as shown in the illustration.

      Note


      • If the ECU integration box is deformed or damaged, replace it.

      • Do not bend the 2 claws more than necessary.

  14. REMOVE HYBRID VEHICLE CONTROL ECU (for RHD)


    1. B005Z68

      Disengage the 2 claws and remove the hybrid vehicle control ECU as shown in the illustration.

      Note


      • If the ECU integration box is deformed or damaged, replace it.

      • Do not bend the 2 claws more than necessary.