Occupant Classification System (Initialization)

HINT: 

Perform zero point calibration if any of the following conditions is met:

• The front seat set (occupant classification ECU) is replaced.
• The passenger airbag ON/OFF indicator indicates OFF 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
   1. Zero point calibration procedures
      1. Check that all of the following conditions are met:
         • The vehicle is parked on a level surface.
         • No objects are placed on the front passenger seat.
         • The front passenger seat belt buckle switch is OFF.
      2. Adjust the seat position according to the table below.

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

      3. Connect the Techstream to the DLC3.
      4. Turn the power switch ON (IG).
      5. Perform zero point calibration by following the prompts on the Techstream screen.

         HINT: 

         • Refer to the Techstream operator's manual for further details.
         • If the zero point calibration is performed when the calibration conditions are not satisfied, DTC B1797 is output.
         • If the zero point calibration has failed, DTC B1797 is output.
         • If After Exchange is selected before the previous ECU data are stored in the Techstream, the display screen returns to CONDITION SELECT ECU: Occupant Detect.

           Item	Procedure
           DTC	Perform DTC check and repair
           Write error	Replace front seat set (with occupant classification ECU and occupant detection sensor)
           Temperature	Check value of THERMISTOR TEMP in ECU DATA LIST
           Pressure	Check value of FILTERED PRESS in ECU DATA LIST
           Crash counter	-

2. SENSITIVITY CHECK
   1. Sensitivity check procedures
      1. Turn the power switch OFF.
      2. Place a weight of 20 kg (44.0 lb) on the front passenger seat.
         Fig 1: Placing Weight On Front Passenger Seat

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