Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Removal

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

*1: When performing learning using the Techstream.

Click here

Disconnect cable from negative battery terminal

Memorize steering angle neutral point

Lane Control System

Pre-collision System

Intelligent Clearance Sonar System*1

Parking Assist Monitor System

Panoramic View Monitor System

Lighting System (w/ Automatic Headlight Beam Level Control System)

Initialize back door lock

Power Door Lock Control System

Reset back door close position

Power Back Door System (w/ Outside Door Control Switch)

Main body ECU (multiplex network body ECU)

Perform code registration (Immobiliser system)

  • Wireless Door Lock Control System
  • Smart Access System with Push-button Start
  • Engine start function
  • Steering Lock System
  • Telematics System

PROCEDURE

1. PRECAUTION

NOTICE:

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

NOTICE:

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

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3. REMOVE INSTRUMENT PANEL GARNISH LH

Click here

4. REMOVE FRONT DOOR SCUFF PLATE 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. DISCONNECT HOOD LOCK CONTROL LEVER SUB-ASSEMBLY

Click here

8. REMOVE LOWER INSTRUMENT PANEL FINISH PANEL SUB-ASSEMBLY

Click here

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

(a) Disconnect each connector.

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

Remove in this Direction

(c) Remove the 2 nuts.

(d) Pull out the instrument panel junction block assembly with main body ECU.

(e) Disengage the clamp.

Remove in this Direction

(f) 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.

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

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

*1

Instrument Panel Junction Block Assembly

*2

Main Body ECU (Multiplex Network Body ECU)

Push in this Direction

(b) 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.

*a

Protective Tape

Insert in this Direction

Remove in this Direction

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.).
  • Do not insert the screwdriver under the connector socket of the main body ECU (multiplex network body ECU).

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

NOTICE:

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

(d) 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.

Remove in this Direction (1)

Remove in this Direction (2)

NOTICE:

Do not touch the main body ECU (multiplex network body ECU) connector.

    Installation
    INSTALLATION CAUTION / NOTICE / HINT NOTICE: Before replacing the main body ECU (multiplex network body ECU), refer to Registration. Click here After the main body ECU (multiplex network body ...

    Steering
    ...

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    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

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