MAIN BODY ECU(for RHD) 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 the main body ECU (multiplex network body ECU) removal/installation are shown below.

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

Click here

Simple intelligent parking assist system*1
Toyota parking assist-sensor system (w/ Simple Intelligent Parking Assist System)*1
Pre-collision system
Initialize back door lock Power door lock control system

Click here

Drive the vehicle until stop and start control is permitted (approximately 5 to 60 minutes)*2 Stop and start system

Click here

Main body ECU (multiplex network body ECU) Perform code registration (Immobilizer system) Wireless door lock control system See Service Bulletin for the registration method. (w/ Entry and Start System)
Entry and start system
Engine start function
Steering lock system

*1: When performing learning using the GTS.

Click here

*2: w/ Stop and start system

PROCEDURE


  1. PRECAUTION

    Note

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

    Click here

  2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL


    Note

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

    Click here

  3. REMOVE NO. 2 INSTRUMENT PANEL LOWER FINISH PANEL

    Click here

  4. REMOVE ECU INTEGRATION BOX LH

    Click here

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


    1. B008M5C

      Disconnect the 2 connectors.

    2. B008KAZ

      Disengage the clamp.

    3. Remove the bolt and nut.

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

    5. B008M59

      Disengage the clamp.

    6. B008KBZC01
      B008LJK Remove in this Direction

      Disengage the clamp.

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

    8. Remove the instrument panel junction block assembly with main body ECU.

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


    1. B008KQAC01
      *1 Instrument Panel Junction Block Assembly
      *2 Main Body ECU (Multiplex Network Body ECU)
      B008MD9 Push in this Direction

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

    2. B008LCFC01
      *a Protective Tape
      B008MD9 Insert in this Direction
      B008LJK Remove in this Direction

      With the instrument panel junction block assembly lock released, insert a screwdriver with its tip wrapped in protective tape horizontally between the main body ECU (multiplex network body ECU) and the instrument panel 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. B008KTKC01
      B008LJK Remove in this Direction (1)
      B008KJ9 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.