OCCUPANT CLASSIFICATION SYSTEM PRECAUTION


  1. PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL

    Note

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

    System See Procedure
    Lane Departure Alert System (w/ Steering Control)

    Click here

    Parking Assist Monitor System
    Pre-collision System

  2. IGNITION SWITCH EXPRESSIONS


    1. The type of ignition switch used on this model differs depending on the specification of the vehicle. The expressions listed in the table below are used in this section.

      Expression Ignition Switch (Position) Engine Switch (Condition)
      Ignition Switch off LOCK Off (Lock)
      Ignition Switch ACC ACC On (ACC)
      Ignition Switch ON ON On (IG)
      Engine Start START On (Start)

  3. GENERAL PRECAUTION


    1. The following conditions may be interpreted as a malfunction even though they are normal operation:


      1. An object is placed on the front passenger seat and the system judges that an adult is seated. As the occupant classification system detects and classifies occupants based on weight, the system may detect an object placed on the seat cushion as an adult passenger depending on its weight.

      2. Pressure is applied to the front passenger seat and the system judges that an adult is seated. As the occupant classification system detects and classifies occupants based on weight, the system may detect an adult passenger if pressure is applied to the seat cushion by hands, etc.

      3. Illumination of the passenger airbag ON/OFF indicator does not change immediately after a passenger is seated or leaves the vehicle. To prevent the classification judgment from changing when a passenger changes their seating posture, a certain amount of time is required to detect and classify an occupant when the calculated weight changes. Therefore, there will be a time lag between when a passenger is seated or leaves the vehicle and when the system detects the occupant.

    2. 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.

        Tech Tips

        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.

        Tech Tips

        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.

        Tech Tips

        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.

        Tech Tips

        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.

        Tech Tips

        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.