Occupant Classification System: Initialization

HINT:

Perform the zero point calibration and sensitivity check if any of the following conditions occur.

• The occupant classification ECU is replaced.
• Accessories (seatback tray and seat cover, etc.) are installed.
• The front passenger seat is removed from the vehicle.
• The passenger airbag ON/OFF indicator ("OFF") comes on when the front passenger seat is not occupied.
• The vehicle is brought to the workshop for re pair due to an accident or a collision.
  1. Zero point calibration and sensitivity check procedures

     HINT:

     Make sure that zero point calibration has finished normally, and then perform the sensitivity check.

     1. Adjust the seat position according to the table below.
        SEAT POSITION ADJUSTMENT REFERENCE
        
        

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

     2. Connect the intelligent tester to the DLC3.
        Fig 1: Identifying Intelligent Tester To DLC3

        Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
     3. Turn the ignition switch to the ON position.
     4. Perform the zero point calibration by following the prompts on the tester screen.
        Fig 2: Zero Point Calibration Procedure

        Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT:

        Refer to the intelligent tester operator's manual for further details.

        OK: "COMPLETE" is displayed. 

     5. Perform the sensitivity check by following the prompts on the tester screen.
     6. Confirm that the beginning sensor reading is within the standard range.

        Standard values: -3.2 to 3.2 kg (-7 to 7 lb) 

     7. Place a 30 kg (66.14 lb) weight (eg. a 30 kg (66.14 lb) of lead mass) onto the front passenger seat.
     8. Confirm that the sensitivity is within the standard range.
        Fig 3: Sensitivity Check Procedure

        Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard values: 27 to 33 kg (59.52 to 72.75 lb) 

        HINT:

        • When performing the sensitivity check, use a solid metal weight (the check result may not appear properly if a liquid weight is used).
        • If the sensitivity deviates from the standard range, retighten the bolts of the front passenger seat taking care not to deform the seat rail. After performing this procedure, if the sensitivity is not within the standard range, replace the front seat assembly RH.
        • If zero point calibration has not finished normally, replace the front seat assembly RH.