Occupant Classification System: Initialization

HINT:

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

• The occupant classification ECU is replaced.
• Accessories (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 the zero point calibration has finished normally, and then perform the sensitivity check.

   1. Adjust the seat position in accordance with the table below.
      ADJUSTMENT ITEM
      
      

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

   2. Connect the intelligent tester (with CAN VIM) to the DLC3.
   3. Turn the power 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 Procedure - Flow Chart

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

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

      OK: COMPLETED 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 range: -3.2 to 3.2 kg (-7 to 7 lb) 

   7. Place a 30 kg (66.14 lb) weight (e.g. a 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 range: 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 be accurate 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 RH.
      • If the zero point calibration has not finished normally, replace the front seat RH.