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 repair 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.
      ADJUSTMENT COMPONENT POSITION CHART
      
      

      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.
   3. Turn the ignition switch on (IG).
      Fig 1: Connecting Intelligent Tester To DLC3

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Perform the zero point calibration by following the prompts on the tester screen.
      Fig 2: Zero Point Calibration Flow Chart

      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 within standard value.

      Standard value: 

      -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 value.
      Fig 3: Sensitivity Check Flow Chart

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard value: 

      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 the weight made from liquid is used).
      • When the sensitivity deviates from the standard value, 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 value, replace the front seat assembly RH.
      • When zero point calibration has not finished normally, replace the front seat assembly RH.