Lexus RX (RX 350L, RX450h) 2016-2022 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 ECM 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

Battery terminal is disconnected/reconnected

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)

Replacement of ECM

Vehicle Identification Number (VIN) registration

MIL comes on

ECU communication ID registration (Immobiliser system)

Engine start function

Perform the following procedures in the order shown (If possible, read the transaxle compensation code from the previous ECM):

  1. Transfer transaxle compensation code
  2. Perform road test to allow ECM to learn
  • Large shift shock
  • Deterioration of fuel efficiency

for U881E Initialization

U881E Registration

U881F Initialization

U881F Registration

Perform the following procedures in the order shown (If impossible, read the transaxle compensation code from the previous ECM):

  1. Reset transaxle compensation code
  2. Perform road test to allow ECM to learn

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

*1: When performing learning using the Techstream.

Click here

PROCEDURE

1. PRECAUTION

NOTICE:

  • Perform Vehicle Identification Number (VIN) registration when replacing the ECM.

    Click here

  • Before replacing the ECM, refer to Registration.

    Click here

  • If the ECM has been struck or dropped, replace it.
  • 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.

Click here

3. REMOVE COOL AIR INTAKE DUCT SEAL

Click here

4. REMOVE ECM

(a) Raise the 2 levers while pushing the locks on the levers, and disconnect the 2 ECM connectors.

NOTICE:

After disconnecting the ECM connectors, make sure that dirt, water or other foreign matter does not contact the connecting parts of the ECM connectors.

*a

Push

*b

Lock

(b) Disengage the wire harness clamp.

(c) Remove the 2 bolts and nut to remove the ECM.

NOTICE:

If the ECM has been struck or dropped, replace it.

Bolt

Nut

5. REMOVE NO. 1 ECM BRACKET

(a) Remove the 2 bolts and No. 1 ECM bracket from the ECM.

6. REMOVE NO. 2 ECM BRACKET

(a) Remove the 2 bolts and No. 2 ECM bracket from the ECM.

    Components
    COMPONENTS ILLUSTRATION *1 ECM *2 NO. 1 ECM BRACKET *3 NO. 2 ECM BRACKET *4 COOL AIR INTAKE DUCT SEAL N*m (kgf*cm, ft.*lbf): Specified torque - - ...

    Installation
    INSTALLATION PROCEDURE 1. INSTALL NO. 2 ECM BRACKET (a) Install the No. 2 ECM bracket to the ECM with the 2 bolts. Torque: 3.0 N·m {31 kgf·cm, 27 in·lbf} 2. INSTALL NO. 1 ECM BRACKET (a) Install t ...

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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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