Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Precaution




When disconnecting the cable from the negative (-) battery terminal, initialize the following system(s) after the cable is reconnected:


See Procedure

Lane Control System

Pre-collision System

Intelligent Clearance Sonar System

Parking Assist Monitor System

Panoramic View Monitor System

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

Power Door Lock Control System

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



  • Before replacing the ECM, refer to Registration.

    Click here

  • If any parts are replaced, perform the following procedures as necessary referring to the table below.

    Replaced Part

    Reset Memory*1

    Set Transaxle Compensation Code

    Learning by Driving (Road Test)

    Automatic transaxle assembly




    Shift solenoid valve SL1 and SL2




    • Transmission valve body assembly
    • Shift solenoid valve SL3, SL4 and SL5





    (If possible, read the transaxle compensation code from the previous ECM)



    Input (into the new ECM)*4






    Engine assembly





  • *1: Reset Memory cannot be completed by only disconnecting and reconnecting the cable to the negative (-) battery terminal.
  • *2: When "Set Transaxle Compensation Code" is performed, "Reset Memory" is automatically completed.
  • *3: Set the transaxle compensation code for the new automatic transaxle.
  • *4: Read the transaxle compensation code from the previous ECM, then transfer it to the new ECM.
  • *5: Set the transaxle compensation code of the current automatic transaxle.
  • Registration of the transaxle compensation code.

    Click here

  • Learning by driving (Road Test).

    Click here

  • Reset Memory.

    Click here



When using compressed air, always aim away from yourself to prevent Automatic Transaxle Fluid (ATF) or kerosene from being sprayed on your face.


  • The automatic transaxle is composed of precision-made parts. Careful inspection before reassembly is necessary because even a small nick could cause fluid leakage or affect performance.
  • The procedures are organized so that you work on only one component group at a time. This will help avoid confusion with similar-looking parts of different sub-assemblies being on your workbench at the same time.
  • The component groups are inspected and repaired from the converter housing side.
  • Whenever possible, complete the inspection, repair and reassembly before proceeding to the next component group. If a defect is found in a certain component group during reassembly, inspect and repair this group immediately. If a component group cannot be assembled because parts are being ordered, be sure to keep all parts of the group in a separate container while proceeding with disassembly, inspection, repair and reassembly of other component groups.
  • Use of Toyota Genuine ATF WS is recommended.
  • All disassembled parts should be cleaned, and compressed air should be blown through any fluid passages and holes.
  • Dry all parts with compressed air. Never use a piece of cloth.
  • The recommended ATF or kerosene should be used for cleaning.
  • After cleaning, the parts should be arranged in the order they were removed for efficient inspection, repair and reassembly.
  • New brake discs and clutch discs must be soaked in ATF for at least 15 minutes before reassembly.
  • All oil seal rings, clutch discs, clutch plates, rotating parts, and sliding surfaces should be coated with ATF prior to reassembly.
  • All old gaskets and rubber O-rings must be replaced.
  • Do not apply adhesive cement to gaskets or similar parts.
  • Make sure that the ends of snap rings are not aligned with any cutouts. Make sure that snap rings are correctly installed into the grooves.
  • If a worn bushing is to be replaced, the sub-assembly containing the bushing must also be replaced.
  • Check the thrust bearings and races for wear or damage. Replace them if necessary.
  • Use petroleum jelly to keep parts in place.
  • When working with seal packing (FIPG), observe the following:
    • Using a razor blade and a gasket scraper, remove all of the old seal packing (FIPG) from the gasket surface.
    • Thoroughly clean all components to remove any seal packing (FIPG).
    • Clean both sealing surfaces with a non-residue solvent.
    • Parts must be reassembled within 10 minutes of application. Otherwise, the seal packing (FIPG) must be removed and reapplied.
    Automatic Transaxle System

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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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