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

INITIALIZATION

DESCRIPTION

(a) Zero point of the occupant classification sensors may deviate in the following situations. To ensure sensor accuracy, be sure to perform Zero Point Calibration.

  1. The occupant detection ECU is replaced.

    HINT:

    As the zero point is not automatically stored in a new occupant detection ECU, it is necessary to perform zero point calibration after replacing the occupant detection ECU.

  2. Accessories (seatback tray, seat cover, etc.) are installed.

    HINT:

    As the weight of accessories will be added to the weight of the occupant, the system will not be able to perform classification accurately.

  3. The front passenger seat is removed from the vehicle.

    HINT:

    As the seat frame will warp slightly when the bolts that are used to install the front passenger seat are tightened, the load applied to the occupant classification sensor will change and the system will not be able to perform classification accurately.

  4. Any of the bolts that are used to install the front passenger seat are removed and reinstalled.

    HINT:

    As the seat frame will warp slightly when the bolts that are used to install the front passenger seat are tightened, the load applied to the occupant classification sensor will change and the system will not be able to perform classification accurately.

  5. The passenger airbag ON/OFF indicator ("ON") illuminates when the front passenger seat is not occupied.

    HINT:

    If any load or pressure is applied to the occupant classification sensors, the system will not be able to perform classification accurately.

  6. An occupant classification sensor collision detection DTC is output due to an accident or a collision.

    HINT:

    If the seat frame or vehicle floor has become deformed and additional pressure is applied to the occupant classification sensor, the system will not be able to perform classification accurately.

NOTICE:

Make sure that the front passenger seat is not occupied before performing the operation.

ZERO POINT CALIBRATION

(a) Zero point calibration procedure

(1) Check that all of the following conditions are met:

  • The vehicle is parked on a level surface.
  • No objects are placed on the front passenger seat.
  • No objects are touching the front passenger seat.

(2) Adjust the seat position according to the table below.

Adjustment Item

Position

Slide Direction

Rearmost position

Headrest Height

Lowest position

Front Tilt Height

Lowest position

Seat Lifter Height

Lowest position

Recline Angle

Upright position

Leg Support*

Rearmost position

  • *: w/ Adjustment Mechanism

(3) Turn the engine switch off.

(4) Connect the Techstream to the DLC3.

(5) Turn the engine switch on (IG).

(6) Turn the Techstream on.

(7) Enter the following menus: Body Electrical / Occupant Detection / Utility / Zero Point Calibration.

Body Electrical > Occupant Detection > Utility

Tester Display

Zero Point Calibration

(8) Perform zero point calibration by following the prompts on the Techstream screen.

OK:

"Zero Point Calibration is complete." is displayed.

HINT:

  • Refer to the Techstream operator's manual for further details.
  • If zero point calibration does not complete normally, perform this procedure again. If zero point calibration cannot be completed normally, replace the front seat adjuster assembly RH.
    How To Proceed With Troubleshooting
    CAUTION / NOTICE / HINT HINT: Use the following procedure to troubleshoot the occupant classification system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEX ...

    Problem Symptoms Table
    PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of ...

    Other materials:

    Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Steering System: On-vehicle Inspection
    ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT STEERING WHEEL FREE PLAY (a) Start the engine and make sure that the vehicle is in a state in which the power steering can operate. (b) Stop the vehicle and align the front wheels facing straight ahead. (c) Gently turn the steering wheel right and left, and ...

    Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Front Evaporator Temperature Sensor: Components
    COMPONENTS ILLUSTRATION *1 AIR CONDITIONING HARNESS ASSEMBLY *2 COOLER EXPANSION VALVE *3 COOLING UNIT PARTS *4 HEATER GROMMET *5 HEATER RADIATOR UNIT SUB-ASSEMBLY *6 NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY *7 NO. 1 COOLER EVAPORATOR SUB-ASSEMBLY ...

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

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

    © 2025 Copyright www.lexusrx.net
    0.0137