Occupant Classification System Initialization

Vehicle Interior. Corolla. Zre142 Aze141
Supplemental Restraint Systems. Corolla. Zre142 Aze141

  1. ZERO POINT CALIBRATION

  1. SENSITIVITY CHECK

Occupant Classification System -- Initialization


NOTICE:
Make sure that the front passenger seat is not occupied before performing the operation.
HINT:
Perform the zero point calibration if any of the following conditions is met:
  1. The occupant classification ECU is replaced.
  2. The passenger airbag ON/OFF indicator indicates OFF when the front passenger seat is not occupied.
  3. The vehicle is brought to the workshop for repair after an accident or a collision.

ZERO POINT CALIBRATION

  1. Zero point calibration procedures

    1. Check that all of the following conditions are met:

      1. The vehicle is parked on a flat surface.
      2. No objects are placed on the front passenger seat.
      3. The front passenger seat belt buckle switch is OFF.

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

      Adjustment Item
      		Position
      Slide Direction
      		Rearmost position
      Reclining Angle
      		Upright position
      Headrest Height
      		Lowest position
      Lifter Height
      		Lowest position

    3. Connect the Techstream to the DLC3.

    4. Turn the ignition switch to ON.

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

    6. Perform the zero point calibration by following the prompts on the Techstream screen.

      HINT:
      1. Refer to the Techstream operator's manual for further details.
      2. If the zero point calibration is performed when the calibration conditions are not satisfied, DTC B1797 is output.
      3. If the zero point calibration has failed, DTC B1797 is output.
      4. If After Exchange is selected before the previous ECU data are stored in the Techstream, the display screen returns to CONDITION SELECT ECU: Occupant Detect.

        Item
        		Procedure
        DTC
        		Perform DTC check and repair
        Write error
        		Replace front seat cushion assembly (with occupant classification ECU and occupant classification sensor)
        Temperature
        		Check value of THERMISTOR TEMP in ECU DATA LIST
        Pressure
        		Check value of FILTERED PRESS in ECU DATA LIST
        Crash counter
        		-

SENSITIVITY CHECK


  1. Sensitivity check procedures

    1. Turn the ignition switch off.



      2. Corolla. Zre142 Aze141

    2. Place a 20 kg (44.0 lb) weight on the front passenger seat.

      NOTICE:
      1. Do not allow the weight to come into contact with the seatback when placing it on the seat cushion.
      2. Place the weight in the area shown in the illustration.

    3. Turn the ignition switch to ON, and wait for at least 6 seconds.

    4. Check that the passenger airbag ON/OFF indicator indicates OFF.

      OK:
      The passenger airbag ON/OFF indicator indicates OFF.

    5. Add a 30 kg (66.1 lb) weight to the front passenger seat (total 50 kg (110.2 lb)).

      NOTICE:
      1. Do not allow the weight to come into contact with the seatback when placing it on the seat cushion.
      2. Place the weight in the area shown in the illustration.

    6. Check that the passenger airbag ON/OFF indicator indicates ON.

      OK:
      The passenger airbag ON/OFF indicator indicates ON.