Initialization [06/2018 - 08/2021]

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2024 Lexus ES 350, 2024 Lexus ES 250, 2023 Lexus ES 350, 2023 Lexus ES 250, and 2022 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.

DESCRIPTION
1. 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 sensors 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 sensors 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.

ZERO POINT CALIBRATION

NOTE:

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

Zero point calibration procedure

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.

Adjust the seat position according to the table below.

Adjustment Item	Position
Seat Position	Rearmost position
Headrest Height	Lowest position
Seatback Angle	Upright position
Vertical Height	Lowest position
Seat Cushion (Front) Angle	Lowest position

Turn the engine switch off.
Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the Techstream on.

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

Body Electrical > Occupant Detection > Utility

Tester Display
Zero Point Calibration

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 service information 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*1 or separate type front seat cushion spring assembly RH*2.
  *1: for TMC Made
  
  *2: for TMMK Made