MAIN BODY ECU REMOVAL

CAUTION / NOTICE / HINT

Note

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

Tech Tips


  • Use the same procedure for RHD and LHD vehicles.

  • The procedure listed below is for LHD vehicles.

PROCEDURE


  1. DISCONNECT DISCHARGE DOOR CONTROL BATTERY AND DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL (w/ Door Control Battery)

    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.

    CAUTION:

    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    Note


    • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work.

      Click here

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

      Click here

    • 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.


    1. Turn the ignition 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 UNLOCK/LOCK

      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.

  2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL (w/o Door Control Battery)

    CAUTION:

    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    Note


    • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work.

      Click here

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

      Click here

  3. REMOVE FRONT FLOOR FOOTREST (for LHD)

    Click here

  4. REMOVE DOOR SCUFF PLATE ASSEMBLY LH

    Click here

  5. REMOVE COWL SIDE TRIM BOARD LH

    Click here

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

    Click here

  7. REMOVE FRONT DOOR OPENING TRIM WEATHERSTRIP LH

    Click here

  8. REMOVE INSTRUMENT SIDE PANEL LH

    Click here

  9. REMOVE LOWER INSTRUMENT PANEL FINISH PANEL SUB-ASSEMBLY

    Click here

  10. REMOVE LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY (w/ Knee Airbag)

    Click here

  11. REMOVE DRIVER SIDE JUNCTION BLOCK ASSEMBLY WITH MAIN BODY ECU (for LHD, except 5L-E)


    1. B001F60C01
      B001CHY Connector (A)
      B001DEF Connector (B)

      for Type A:


      1. Disconnect the 2 connectors (A) and connector (B).

    2. for Type B:


      1. Disconnect the 2 connectors (A).

    3. B001CRAC01
      B001CHY Lever Connector
      B001DEF Connector (A)
      B001HIB Connector (B)
      B001CE2 Protective Tape

      Disconnect the 2 connectors (A).

    4. w/ Door Control Battery:


      1. Disconnect the connector (B).

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

    6. B001EFQC01
      B001CHY Nut (A)
      B001DEF Nut (B)

      Remove the 2 nuts (A).

    7. w/ Door Control Battery:


      1. Remove the 2 nuts (A) and nut (B).

    8. B001DW2

      Detach the clamp.

    9. B001EYP

      Detach the clamp.

    10. B001H4S

      Detach the clamp.

    11. B001E0UC01
      B001CE2 Protective Tape

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

    12. B001I1TC01
      B001CE2 Protective Tape

      Using a thin-bladed screwdriver with its tip wrapped with protective tape, detach the claw and disconnect the lever connector and then remove the driver side junction block assembly with the main body ECU.

  12. REMOVE DRIVER SIDE JUNCTION BLOCK ASSEMBLY WITH MAIN BODY ECU (for LHD, 5L-E)


    1. B001GRW

      Disconnect the 3 connectors.

    2. B001HWMC01
      B001CHY Lever Connector
      B001DEF Connector
      B001CE2 Protective Tape

      Disconnect the connector.

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

    4. B001CY2

      Remove the 2 nuts.

    5. B001DW2

      Detach the clamp.

    6. B001EYP

      Detach the clamp.

    7. B001H4S

      Detach the clamp.

    8. B001GBJC01
      B001CE2 Protective Tape

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

    9. B001GYF

      Detach the claw and release the connector's lock as shown in the illustration.

    10. B001FX6C01
      B001CE2 Protective Tape

      Using a thin-bladed screwdriver with its tip wrapped with protective tape, detach the claw and disconnect the lever connector and then remove the driver side junction block assembly with the main body ECU.

  13. REMOVE DRIVER SIDE JUNCTION BLOCK ASSEMBLY WITH MAIN BODY ECU (for RHD, except 5L-E)


    1. B001DSZC01
      B001CHY Connector (A)
      B001DEF Connector (B)

      for Type A:


      1. Disconnect the 2 connectors (A) and connector (B).

    2. for Type B:


      1. Disconnect the 2 connectors (A).

    3. B001HQYC01
      B001CHY Lever Connector
      B001DEF Connector
      B001CE2 Protective Tape

      Disconnect the 2 connectors.

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

    5. B001GE2C01
      B001CHY Lever Connector
      B001DEF Connector
      B001CE2 Protective Tape

      Disconnect the 2 connectors.

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

    7. Detach the clamp.

    8. B001HIZ

      Remove the 2 nuts.

    9. Detach the 4 clamps.

    10. w/ KDSS:


      1. Remove the stabilizer control ECU.

        Click here

    11. B001F8D

      Detach the clamp.

    12. B001FLZ

      Detach the clamp.

    13. B001GGPC01
      B001CE2 Protective Tape

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

    14. B001FNCC01
      B001CE2 Protective Tape

      Using a thin-bladed screwdriver with its tip wrapped with protective tape, detach the claw and disconnect the lever connector and then remove the driver side junction block assembly with the main body ECU.

  14. REMOVE DRIVER SIDE JUNCTION BLOCK ASSEMBLY WITH MAIN BODY ECU (for RHD, 5L-E)


    1. B001HLF

      Disconnect the 3 connectors.

    2. B001EHTC01
      B001CHY Lever Connector
      B001DEF Connector
      B001CE2 Protective Tape

      Disconnect the connector.

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

    4. B001GE2C01
      B001CHY Lever Connector
      B001DEF Connector
      B001CE2 Protective Tape

      Disconnect the 2 connectors.

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

    6. Detach the clamp.

    7. B001HIZ

      Remove the 2 nuts.

    8. Detach the 4 clamps.

    9. B001F8D

      Detach the clamp.

    10. B001FLZ

      Detach the clamp.

    11. B001D7MC01
      B001CE2 Protective Tape

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

    12. B001CLT

      Detach the claw and release the connector's lock as shown in the illustration.

    13. B001ENTC01
      B001CE2 Protective Tape

      Using a thin-bladed screwdriver with its tip wrapped with protective tape, detach the claw and disconnect the lever connector and then remove the driver side junction block assembly with the main body ECU.

  15. REMOVE DOOR CONTROL BATTERY (w/ Door Control Battery)

    Click here

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


    1. B001DUQC01
      *A for LHD
      *B for RHD

      Remove the bolt.

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

    3. B001FR7C08
      *1 Main Body ECU (Multiplex Network Body ECU)
      *2 Driver Side Junction Block Assembly
      B001CE2 Protective Tape

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

    4. With the driver side 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 driver side 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 driver side junction block assembly or the main body ECU (multiplex network body ECU).

    5. B001EWFC01
      B001CE2 Protective Tape

      Using a 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).

      • Replace the driver side junction block assembly or the main body ECU (multiplex network body ECU) when the connector terminal, locking section or case is damaged or deformed.

    6. B001DKPC01
      *a Rib

      Catch hold rib of ECU's lock and 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 driver side junction block assembly connector or the main body ECU (multiplex network body ECU) connector.

      • When removing the driver side junction block assembly or the main body ECU (multiplex network body ECU), take care not to damage it.

      • Do not use the driver side junction block assembly or the main body ECU (multiplex network body ECU) that has been dropped or subjected to a strong shock.