MAIN BODY ECU(for LHD) REMOVAL

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 notice before proceeding with work.

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  2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL (w/o Pretensioner)

    Note

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

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  3. DISCHARGE DOOR CONTROL BATTERY AND DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL (w/ Rear Pretensioner)

    Note


    • Make sure to perform this procedure with the power supply of the battery and door control battery cut to prevent damage during removal and installation of the instrument panel junction block assembly.

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

    • 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. Repeat the "Shock Detection Unlock" Active Test until the multiplex network body ECU (main body ECU) communication lost error "Lost communication with vehicle" appears on the GTS display.


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

      Tech Tips


      • When the door control battery becomes completely discharged and the power supply is cut, the multiplex network body ECU (main body ECU) communication lost error "Lost communication with vehicle" appears on the GTS display.

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

  4. REMOVE DOOR SCUFF PLATE ASSEMBLY LH

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  5. REMOVE COWL SIDE TRIM BOARD LH

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  6. REMOVE INSTRUMENT SIDE PANEL LH

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  7. REMOVE NO. 1 INSTRUMENT PANEL SAFETY PAD SUB-ASSEMBLY

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  8. REMOVE REAR CONSOLE ARMREST ASSEMBLY

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  9. REMOVE UPPER NO. 2 CONSOLE PANEL GARNISH

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  10. REMOVE NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY

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  11. REMOVE LOWER NO. 1 INSTRUMENT PANEL FINISH PANEL

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  12. REMOVE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. B00599R

      Disconnect the connector.

    2. Detach the claw and disconnect the connector housing.

    3. Detach the 2 wire harness clamps.

    4. B005AFXC01
      *A w/ Connector Stopper
      *1 Connector Stopper

      w/o Connector Stopper:


      1. Release the connector lock lever and disconnect the connector.

        Tech Tips

        Use the same procedure to disconnect the remaining 3 connectors.

    5. w/ Connector Stopper:


      1. Detach the claw and release the connector stopper.

      2. Release the connector lock lever and disconnect the connector.

        Tech Tips

        Use the same procedure to disconnect the remaining 3 connectors.

    6. B005AWT

      Disconnect the connector from the lower side of the instrument panel junction block assembly.

    7. B005B6V

      Remove the bolt, 2 nuts and instrument panel junction block assembly.

    8. B005AL3

      Disconnect the 3 connectors from the multiplex network body ECU (main body ECU).

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

    Note


    • If the multiplex network body ECU (main body ECU) is replaced, replace it with a new one.

    • If the multiplex network body ECU (main body ECU) is replaced, refer to the Service Bulletin.

    • As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (multiplex network body ECU) before performing this troubleshooting procedure.*

      *: w/ Rear Pretensioner


    1. B005B5IC03
      *1 Claw of Junction Block
      B0057KY Protective Tape

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

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

      Note

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

    3. B0057I0C03
      B0057KY Protective Tape

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

      Note


      • Do not insert the screwdriver opening between the junction block and the connector of the multiplex network body ECU (main body ECU).

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

    4. B005AWPC01
      B0057RX Raise
      B0059IK Slide Out

      Raise the multiplex network body ECU (main body ECU) as shown by the black arrow, and then slide it out as shown by the white arrow in the illustration.

      Note

      Do not touch the ECU connector.