Supplemental Restraint System - Diagnostics: Initialization

HINT:

Perform 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 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.
  Fig 1: Connecting Hand-Held Tester To DLC3

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Zero point calibration and sensitivity check procedures.

   HINT:

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

   1. Adjust the seat position according to the table shown in COMPONENT ADJUSTMENT AND POSITION  .
      COMPONENT ADJUSTMENT AND POSITION
      
      

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

   2. Connect the hand-held tester to the DLC3.
   3. Turn the ignition switch to the ON position.
   4. Perform zero point calibration by following the prompts on the tester screen shown in Fig 2 .

      HINT:

      Refer to the hand-held tester operator's manual for further details.

      OK: "COMPLETE" is displayed. 

   5. Perform sensitivity check by following the prompts on the tester screen shown in Fig 3 .
   6. Confirm that the beginning sensor reading is within the 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 passenger seat.
   8. Confirm that the sensitivity is within the standard value.

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

      HINT:

      • When performing 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, re-tighten the bolts of the 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 RH seat assy.
      • When zero point calibration has not finished normally, replace the front RH seat assy.
      Fig 2: Zero Point Calibration Procedure Chart

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 3: Sensitivity Checking Procedures Chart

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002