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 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 battery terminal Memorize steering angle neutral point LKA/LDA System

Click here

Intelligent clearance sonar system*1
Pre-crash safety system

Lighting system (EXT)


  • Cornering lights

Adaptive high beam system
Drive the vehicle until stop and start control is permitted (approximately 15 to 60 minutes) Stop and start system

Click here

Memorize steering angle neutral point Parking assist monitor system (w/ Parallel parking assist function)

Click here

Parking assist monitor system (w/o Parallel parking assist function)

Click here

Panoramic view monitor system

Click here

Initialize back door lock Power door lock control system

Click here

Reset back door close position Power back door system

Click here

Main body ECU (multiplex network body ECU) Perform code registration (Immobiliser system)
  • Wireless door lock control system

  • Entry and start system

  • Engine start function

  • Steering lock system

  • Telematics system

See Service Bulletin for the registration method.
*1: When performing learning using the GTS.
Click here Click here

PROCEDURE


  1. PRECAUTION

    Note

    After turning the engine 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 (w/ Canister Pump Module or w/o Door Ajar Warning Buzzer Function)

    Note

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

    Click here

  3. DISCHARGE DOOR CONTROL BATTERY AND DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL (w/o Canister Pump Module with Door Ajar Warning Buzzer Function)

    Note


    • Always ensure that the cable is disconnected from the negative (-) battery terminal and the door control battery is fully discharged when removing or installing the junction block assembly.

    • Make sure to perform the following procedures, and then perform removal and installation of the junction block assembly with on power supplied from the battery and door control battery.

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

      Click here

    Tech Tips


    • When the engine switch is turned off after the door control battery is fully charged, the door control battery becomes completely discharged due to self-discharge within approximately 30 minutes.

    • Approximately 90 seconds after the engine switch is turned on (IG), the door control battery becomes fully charged.

    • When approximately 30 minutes or more elapse after the engine switch is turned off, the Active Test may not be able to be performed.


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Main Body / Active Test.


      Body Electrical > Main Body > Active Test
      Tester Display Control Range
      Shock Detection Unlock ON/OFF

      Note

      Do not perform the Active Test at this time.

    5. Disconnect the cable from the negative (-) battery terminal.

    6. Perform the "Shock Detection Unlock" Active Test repeatedly until the multiplex network body ECU (main body ECU) communication lost error message "Lost communication with vehicle" is displayed on the GTS.


      Body Electrical > Main Body > Active Test
      Tester Display
      Shock Detection Unlock

      Tech Tips


      • When the cable is disconnected from the negative (-) battery terminal and the door control battery becomes completely discharged, the multiplex network body ECU (main body ECU) communication lost message "Lost communication with vehicle" is displayed on the GTS.

      • The number of times the Active Test can be performed depends on the charge condition of the door control battery.

  4. REMOVE INSTRUMENT PANEL GARNISH LH (for LHD)

    Click here

  5. REMOVE FRONT DOOR SCUFF PLATE LH (for LHD)

    Click here

  6. REMOVE COWL SIDE TRIM BOARD LH (for LHD)

    Click here

  7. REMOVE NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY (for LHD)

    Click here

  8. DISCONNECT HOOD LOCK CONTROL LEVER SUB-ASSEMBLY (for LHD)

    Click here

  9. REMOVE LOWER INSTRUMENT PANEL FINISH PANEL SUB-ASSEMBLY (for LHD)

    Click here

  10. REMOVE INSTRUMENT PANEL GARNISH LH (for RHD)

    Tech Tips

    Use the same procedure for RHD and LHD.

    Click here

  11. REMOVE FRONT DOOR SCUFF PLATE LH (for RHD)

    Tech Tips

    Use the same procedure for RHD and LHD.

    Click here

  12. REMOVE COWL SIDE TRIM BOARD LH (for RHD)

    Tech Tips

    Use the same procedure for RHD and LHD.

    Click here

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

    Tech Tips

    Use the same procedure for RHD and LHD.

    Click here

  14. REMOVE LOWER NO. 1 INSTRUMENT PANEL FINISH PANEL (for RHD)

    Tech Tips

    Use the same procedure for RHD and LHD.

    Click here

  15. REMOVE GLOVE COMPARTMENT DOOR ASSEMBLY (for RHD)

    Tech Tips

    Use the same procedure for RHD and LHD.

    Click here

  16. REMOVE ECU INTEGRATION BOX LH (for RHD)

    Click here

  17. REMOVE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY WITH MAIN BODY ECU (for LHD)


    1. B005QAF

      Disconnect each connector.

    2. B005LJOC01
      B005OOA 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.

    3. B005ME2

      Remove the 2 nuts.

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

    5. B005L5TC01
      B005OOA Remove in this Direction

      Disengage the clamp.

    6. 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.

  18. REMOVE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY WITH MAIN BODY ECU (for RHD)


    1. B005N26

      Disconnect each connector.

    2. B005PZ8C02
      B005OOA 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.

    3. B005LIYC01
      B005NIZ Bolt
      B005LWS Nut

      Remove the bolt and nut.

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

    5. B005OUUC02
      B005OOA Remove in this Direction

      Disengage the clamp.

    6. 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.

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


    1. B005N31C02
      *1 Instrument Panel Junction Block Assembly
      *2 Main Body ECU (Multiplex Network Body ECU)
      B005NIZ Push in this Direction

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

    2. B005LFZC02
      *a Protective Tape
      B005NIZ Insert in this Direction
      B005OMH 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 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. B005PNOC01
      B005OOA Remove in this Direction (1)
      B005OMH 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.