MAIN BODY ECU REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during main body ECU (multiplex network body ECU) removal/installation are shown below.

Necessary Procedure After Parts Removed/Installed/Replaced
Replaced Part or Performed Procedure Necessary Procedure Effect/Inoperative Function when Necessary Procedure not Performed Link
Disconnect cable from negative auxiliary battery terminal Memorize steering angle neutral point Lane departure alert system (w/ Steering Control)

Click here

Intelligent clearance sonar system*1
Simple intelligent parking assist system*1
Pre-crash safety system
Parking assist monitor system

Click here

Initialize back door lock Power door lock control system

Click here

Main body ECU (multiplex network body ECU) Perform code registration (Immobiliser system)
  • Entry and start system

  • Wireless door lock control system

  • Hybrid control system cannot be started

See Service Bulletin for the registration method.

*1: When performing learning using the GTS.

Click here

PROCEDURE


  1. PRECAUTION (for RHD)

    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

  2. DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL (for RHD)

    Note

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

    Click here

  3. REMOVE LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY (for LHD)

    Click here

  4. REMOVE NO. 3 INSTRUMENT PANEL TO COWL BRACE SUB-ASSEMBLY (for LHD)

    Click here

  5. REMOVE NO. 2 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY (for RHD)

    Tech Tips

    Use the same procedure for RHD and LHD.

    Click here

  6. REMOVE GLOVE COMPARTMENT DOOR ASSEMBLY (for RHD)

    Tech Tips

    Use the same procedure for RHD and LHD.

    Click here

  7. REMOVE ECU INTEGRATION BOX LH (for RHD)

    Click here

  8. REMOVE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY WITH MAIN BODY ECU


    1. for LHD:


      1. B004PEU

        Disconnect each connector.

      2. Disengage the clamp.

      3. B004P26C01
        B004PI4 Remove in this Direction

        Disengage the 2 claws and pull down the 2 lock levers to disconnect the 2 connectors as shown in the illustration.

      4. B004PR1C01
        B004PRK Bolt
        B004P9H Nut

        Remove the bolt and nut.

      5. Pull out the instrument panel junction block assembly with main body ECU.

      6. B004QMR

        Disengage the clamp.

      7. B004PF7C01
        B004PI4 Remove in this Direction

        Disengage the clamp.

      8. Disengage the 2 claws and pull down the 2 lock levers to disconnect the 2 connectors as shown in the illustration and remove the instrument panel junction block assembly with main body ECU.

    2. for RHD:


      1. B004P2G

        Disconnect each connector.

      2. Disengage the clamp.

      3. B004QTOC01
        B004PI4 Remove in this Direction

        Disengage the 2 claws and pull down the 2 lock levers to disconnect the 2 connectors as shown in the illustration.

      4. B004PFTC01
        B004PRK Bolt
        B004P9H Nut

        Remove the bolt and nut.

      5. Pull out the instrument panel junction block assembly with main body ECU.

      6. B004QP8

        Disengage the clamp.

      7. B004PVVC01
        B004PI4 Remove in this Direction

        Disengage the clamp.

      8. Disengage the 2 claws and raise the 2 lock levers to disconnect the 2 connectors as shown in the illustration and remove the instrument panel junction block assembly with main body ECU.

  9. REMOVE WIRING HARNESS CLAMP BRACKET (for LHD)


    1. B004QC6C01
      B004PI4 Remove in this Direction

      Remove the bolt.

    2. Disengage the claw and remove the wiring harness clamp bracket as shown in the illustration.

  10. REMOVE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


    1. B004OI3C01
      *1 Instrument Panel Junction Block Assembly
      *2 Main Body ECU (Multiplex Network Body ECU)
      B004PRK Push in this Direction

      Press the claw of the instrument panel junction block assembly as shown in the illustration to release the lock.

    2. B004Q3TC01
      *a Protective Tape
      B004PRK Insert in this Direction
      B004PI4 Remove in this Direction

      With the instrument panel junction block assembly lock released, insert a screwdriver with its tip wrapped with protective tape horizontally between the main body ECU (multiplex network body ECU) and junction block assembly.

      Note


      • Use a screwdriver with a diameter between 5.0 mm (0.197 in.) and 6.3 mm (0.248 in.) and a length of approximately 90 mm (3.54 in.).

      • Do not insert the screwdriver under the connector socket of the main body ECU (multiplex network body ECU).

    3. Using the screwdriver, carefully raise the main body ECU (multiplex network body ECU) to the position where the connector becomes disconnected.

      Note

      Do not twist the screwdriver to raise the main body ECU (multiplex network body ECU).

    4. B004PGIC01
      B004PI4 Remove in this Direction (1)
      B004OIV Remove in this Direction (2)

      Raise the main body ECU (multiplex network body ECU) as shown by the arrow (1), and then pull it out as shown by the arrow (2) in the illustration.

      Note

      Do not touch the main body ECU (multiplex network body ECU) connector.