Last Modified: 05-08-2025 6.11:8.1.0 Doc ID: RM10000000258CL
Model Year Start: 2023 Model: RAV4 Prod Date Range: [10/2022 - 10/2023]
Title: POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL; 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]

REMOVAL

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.

Necessary Procedure After Parts Removed/Installed/Replaced (for HV Model)

Replaced Part or Performed Procedures

Necessary procedures

Effect/Inoperative Function when Necessary Procedures are not Performed

Link
*: When performing learning using the Techstream.

Click here 2023 MY RAV4 HV [10/2022 - 10/2023]; PARK ASSIST / MONITORING: PARKING SUPPORT BRAKE SYSTEM (for HV Model): CALIBRATION

Disconnect cable from negative (-) auxiliary battery terminal

Perform steering sensor zero point calibration

Lane control system

2022 - 2025 MY RAV4 RAV4 HV [12/2021 -        ]; PRE-COLLISION: PRE-COLLISION SYSTEM: INITIALIZATION

Parking support brake system (for HV model)*

Pre-collision system

Reset back door close position

Power back door system (for HV model)

2019 - 2023 MY RAV4 HV [11/2018 - 10/2023]; DOOR / HATCH: POWER BACK DOOR SYSTEM (for HV Model): INITIALIZATION

Back door lock initialization

Power door lock control system

2019 - 2025 MY RAV4 RAV4 HV [11/2018 -        ]; DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: INITIALIZATION

w/ Smart Key System:

  • Main body ECU (multiplex network body ECU)

Code registration
  • Wireless door lock control system (for HV model, with smart key system)
  • Smart key system (for Entry function, HV model)
  • Smart key system (for start function, HV model)
  • Hybrid control system cannot be started

2022 - 2025 MY RAV4 HV [12/2021 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION

NOTICE:

After the ignition switch is turned off, the radio and display receiver assembly records various types of memory and settings. As a result, after turning the ignition switch off, be sure to wait for the time specified in the following table before disconnecting the cable from the negative (-) auxiliary battery terminal.

Waiting Time before Disconnecting Cable from Negative (-) Auxiliary Battery Terminal

System Name

See Procedure

Vehicle enrolled in Toyota Audio Multimedia system or safety connect system

6 minutes

Vehicle not enrolled in Toyota Audio Multimedia system and safety connect system

1 minute

Necessary Procedure After Parts Removed/Installed/Replaced (for Gasoline Model)

Replaced Part or Performed Procedures

Necessary procedures

Effect/Inoperative Function when Necessary Procedures are not Performed

Link
*: When performing learning using the Techstream.

Click here 2023 MY RAV4 [10/2022 - 10/2023]; PARK ASSIST / MONITORING: PARKING SUPPORT BRAKE SYSTEM (for Gasoline Model): CALIBRATION

Disconnect cable from negative (-) auxiliary battery terminal

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

Stop and start system

2023 MY RAV4 [10/2022 - 10/2023]; STOP AND START: STOP AND START SYSTEM: PRECAUTION

Perform steering sensor zero point calibration

Lane control system

2022 - 2025 MY RAV4 RAV4 HV [12/2021 -        ]; PRE-COLLISION: PRE-COLLISION SYSTEM: INITIALIZATION

Parking support brake system (for Gasoline model)*

Pre-collision system

Reset back door close position

Power back door system (for Gasoline model)

2019 - 2023 MY RAV4 [11/2018 - 10/2023]; DOOR / HATCH: POWER BACK DOOR SYSTEM (for Gasoline Model): INITIALIZATION

Back door lock initialization

Power door lock control system

2019 - 2025 MY RAV4 RAV4 HV [11/2018 -        ]; DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: INITIALIZATION

w/ Smart Key System:

  • Main body ECU (multiplex network body ECU)

Code registration
  • Wireless door lock control system (for Gasoline model, with smart key system)
  • Smart key system (for Entry function, Gasoline model)
  • Smart key system (for Start function, Gasoline model)
  • Engine start function

2022 - 2025 MY RAV4 [12/2021 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

NOTICE:

After the ignition switch is turned off, the radio and display receiver assembly records various types of memory and settings. As a result, after turning the ignition switch off, be sure to wait for the time specified in the following table before disconnecting the cable from the negative (-) auxiliary battery terminal.

Waiting Time before Disconnecting Cable from Negative (-) Auxiliary Battery Terminal

System Name

See Procedure

Vehicle enrolled in Toyota Audio Multimedia system or safety connect system

6 minutes

Vehicle not enrolled in Toyota Audio Multimedia system and safety connect system

1 minute

PROCEDURE

1. PRECAUTION

CAUTION:

Some of these service operations affect the SRS airbag system. Read the precautionary notices concerning the SRS airbag system before servicing.

Click here 2021 - 2025 MY RAV4 RAV4 HV [08/2020 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: PRECAUTION

NOTICE:

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

    Click here 2019 - 2025 MY RAV4 RAV4 HV [11/2018 -        ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION

  • 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.

2. REMOVE DECK BOARD ASSEMBLY (for HV Model)

Click here 2023 MY RAV4 HV [10/2022 - 10/2023]; MAINTENANCE: A25A-FXS AUXILIARY BATTERY: REMOVAL+

3. REMOVE REAR NO. 2 FLOOR BOARD (for HV Model)

Click here 2023 MY RAV4 HV [10/2022 - 10/2023]; MAINTENANCE: A25A-FXS AUXILIARY BATTERY: REMOVAL+

4. REMOVE BATTERY HOLE COVER (for HV Model)

Click here 2023 MY RAV4 HV [10/2022 - 10/2023]; MAINTENANCE: A25A-FXS AUXILIARY BATTERY: REMOVAL+

5. DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL

  • for A25A-FKS:

    Click here 2023 MY RAV4 [10/2022 - 10/2023]; MAINTENANCE: A25A-FKS BATTERY: REMOVAL+

  • for A25A-FXS:

    Click here 2023 MY RAV4 HV [10/2022 - 10/2023]; MAINTENANCE: A25A-FXS AUXILIARY BATTERY: REMOVAL+

  • Wait at least 90 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.
  • If the airbag deploys for any reason, it may cause a serious accident.

NOTICE:

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

Click here 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION

6. REMOVE LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY

Click here 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; SUPPLEMENTAL RESTRAINT SYSTEMS: KNEE AIRBAG ASSEMBLY: REMOVAL

7. REMOVE NO. 3 INSTRUMENT PANEL TO COWL BRACE SUB-ASSEMBLY (for TMC Made)

(a) Detach the 2 wire harness clamps.

(b) Remove the nut, bolt and No. 3 instrument panel to cowl brace sub-assembly.

Nut

Bolt

8. REMOVE CENTER INSTRUMENT PANEL BRACKET SUB-ASSEMBLY (for TMMC Made)

HINT:

Use the same procedure described as for the No. 3 instrument panel to cowl brace sub-assembly (for TMC Made).

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

(a) Detach the 2 wire harness clamps.

*a

w/ Clearance Warning System

(b) w/ Clearance Warning System:

(1) Disconnect the 5 connectors.

(c) w/o Clearance Warning System:

(1) Disconnect the 4 connectors.

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

*a

Lever Connector

Rotate in this Direction

Protective Tape

(e) Detach the wire harness clamp.

(f) Disconnect the 2 connectors.

(g) Disconnect the 5 connectors.

(h) Remove the 2 nuts.

(i) Detach the claw and disconnect the instrument panel junction block assembly with main body ECU.

(j) Detach the claw and remove the instrument panel junction block assembly with main body ECU from the connector holder.

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

*a

Lever Connector

-

-

Rotate in this Direction

Protective Tape

(l) Detach the wire harness clamp and remove the instrument panel junction block assembly with main body ECU.

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

(a) Detach the claw and remove the junction block bracket from the instrument panel junction block assembly with main body ECU.

(b) 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.

*a

Instrument Panel Junction Block Assembly

*b

Main Body ECU (Multiplex Network Body ECU)

Movement Direction

Instrument Panel Junction Block Assembly Lock

(c) 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.

NOTICE:

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.).

Horizontally Insert a Thin-bladed Screwdriver

Protective Tape

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

*a

Internal Connector

Insert a Thin-bladed Screwdriver in this Direction

Released in this Direction

Protective Tape

NOTICE:

  • Do not twist the screwdriver to raise the main body ECU (multiplex network body ECU).
  • Do not excessively insert the screwdriver. Otherwise, the internal connector terminals may become deformed or damaged.
  • Replace the instrument panel junction block assembly when the connector terminal, the locking section, or the case is damaged or deformed.

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

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

Rotate in this Direction

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

Remove in this Direction