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.
      ZERO POINT CALIBRATION
      
      

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

   2. Connect the intelligent tester to the DLC3.
   3. Turn the ignition switch to the ON position.
      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 Procedure 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 is within the standard range.

      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 range.
   Fig 3: Sensitivity Check Procedure 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 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.