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MAIN BODY ECU REMOVAL

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CAUTION / NOTICE / HINT

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

Table 1. Necessary Procedure After Parts Removed/Installed/Replaced
Replaced Part or Performed Procedure Necessary procedures Effect/Inoperative Function when Necessary Procedure not Performed Link
Replacement of main body ECU (multiplex network body ECU) Perform code registration

  • Wireless door lock control system

  • Entry and start system

  • Hybrid control system cannot be started

 See Service Bulletin for the registration method.
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PROCEDURE


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    PRECAUTION

    Note:

    • Do not remove the main body ECU (multiplex network body ECU) except when replacing it.

    • When removing the main body ECU (multiplex network body ECU), always replace it with a new one.

    Tip:

    • Use the same procedure for RHD and LHD vehicles.

    • The procedure listed below is for LHD vehicles.

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    REMOVE LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY

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    REMOVE NO. 1 AIR DUCT SUB-ASSEMBLY

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    REMOVE NO. 1 HEATER TO REGISTER DUCT

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    REMOVE NO. 3 INSTRUMENT PANEL TO COWL BRACE SUB-ASSEMBLY

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    REMOVE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY WITH MAIN BODY ECU


    1. B004U55

      Remove the 2 nuts and disconnect the ECU.

      B004VS8
      Note:

      If the removed nut is the same shape as that shown in the illustration, replace it the supplied replacement part.

    2. B004WAX

      Remove the 2 nuts and disconnect the instrument panel junction block assembly with main body ECU.

      B004VS8
      Note:

      If the removed nut is the same shape as that shown in the illustration, replace it the supplied replacement part.

    3. B004RBRC01
      *a Lever Connector - -
      B004RMI Rotate in this Direction B004VGX Protective Tape

      Disconnect the 5 connectors.

    4. Using a thin-bladed screwdriver with its tip wrapped with protective tape, detach the claw and disconnect the 2 lever connectors.

    5. B004RXTC01
      *a Lever Connector - -
      B004RMI Rotate in this Direction B004VGX Protective Tape

      Detach the clamp.

    6. Using a thin-bladed screwdriver with its tip wrapped with protective tape, detach the claw, disconnect the 2 lever connectors and remove the instrument panel junction block with main body ECU assembly.

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    REMOVE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


    1. B004V9G

      Remove the nut.

      B004VS8
      Note:

      If the removed nut is the same shape as that shown in the illustration, replace it the supplied replacement part.

    2. Detach the claw and remove the wiring harness clamp bracket.

    3. B004XLHC01
      *a Instrument Panel Junction Block Assembly *b Main Body ECU (Multiplex Network Body ECU)
      B004RMI Movement Direction B004VGX Instrument Panel Junction Block Assembly Lock

      Press the lock of the instrument panel junction block assembly and release the lock of the main body ECU (multiplex network body ECU) as shown in the illustration.

    4. B004T00C01
      B004RMI Horizontally Insert a Thin-bladed Screwdriver B004VGX Protective Tape
      B004W6AC01
      *a Internal Connector
      B004VGX Near Internal Connector

      While pressing the lock, horizontally insert a thin-bladed screwdriver with its tip wrapped with protective tape between the main body ECU (multiplex network body ECU) and instrument panel junction block assembly (near the internal connector).

      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.).

    5. B004U6IC01
      B004RMI Insert a Thin-bladed Screwdriver in this Direction
      B004T3S Released in this Direction
      B004VGX Protective Tape

      When the thin-bladed screwdriver with its tip wrapped with protective tape is inserted, the internal connector lock is released.

      Note:

      Replace the instrument panel junction block assembly when the connector terminal, the locking section, or the case is damaged or deformed.

    6. B004XSS

      Hold the rib of the main body ECU (multiplex network body ECU).

    7. B004V4DC01
      B004RMI Rotate in this Direction

      While rotating the main body ECU (multiplex network body ECU), completely release the lock.

    8. B004RIHC01
      B004RMI Remove in this Direction

      Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.