Occupant Classification System (Diagnostics - Introduction): Other Toyota Yaris II рестайлинг

PRECAUTION

1. INSPECTION PROCEDURE FOR VEHICLE INVOLVED IN ACCIDENT Perform the zero point calibration and sensitivity check if any of the following conditions apply. 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. NOTE: When an accident vehicle is brought into the workshop for repair, check the flatness of the floor where the front passenger seat is mounted. If the flatness is not within +- 3.0 mm (0.118 in.), adjust it to the specified range.

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1. GENERAL The front passenger occupant classification system judges whether the front passenger seat is occupied by an adult or child (with child seat) or is unoccupied, in accordance with the load that is applied to the front passenger seat and whether the seat belt is buckled. Thus, when appropriate, it restricts the deployment of the front passenger airbag, front passenger side airbag, and the front passenger seat belt pretensioner. In addition, the system informs the driver of the result of the judgment through the use of the airbag ON/ OFF indicator.
2. MAIN COMPONENTS Component Description Occupant Classification Sensor Outputs voltages to occupant classification ECU in accordance with load applied to sensor Occupant Classification ECU Constantly monitors weight of front passenger seat load, and judges occupancy condition in accordance with signals from occupant classification sensors and seat belt buckle switch Airbag ON/OFF Indicator Airbag ON indicator illuminates when front passenger and front passenger side airbags activated. Airbag OFF indicator illuminates when front passenger and front passenger side airbags deactivated. Seat Belt Buckle Switch Detects whether seat belt fastened and outputs appropriate signals to occupant classification ECU

INITIALIZATION

Note. Make sure that the front passenger seat is not occupied, before performing the operation.

HINT

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

1. The occupant classification ECU is replaced.
2. Accessories (seatback tray and seat cover, etc.) are installed.
3. The front passenger seat is removed from the vehicle.
4. The passenger airbag ON/OFF indicator (OFF) comes on when the front passenger seat is not occupied.
5. The vehicle is brought to the workshop for repair due to an accident or a collision.

1. ZERO POINT CALIBRATION Zero point calibration procedures: HINT: Make sure that the zero point calibration has finished normally, and then perform the sensitivity check. Check that all of the following conditions are met: The vehicle is parked on a level surface. No objects are placed on the front seat RH. The front seat inner belt RH (passenger side buckle switch) is off. Adjust the seat position in accordance with the table below. Adjustment Item Position Slide Direction Rearmost position Reclining Angle Upright position Headrest Height Lowest position Lifter Height Lowest position Connect a Techstream to the DLC3. Turn the ignition switch to ON. Perform the zero point calibration by following the prompts on the tester screen. HINT: Refer to the Techstream operator's manual for further details. If the zero point calibration has not finished normally, replace the front seat RH.
2. SENSITIVITY CHECK Sensitivity check procedures: Connect a Techstream to the DLC3. Turn the ignition switch ON. Perform the sensitivity check by following the prompts on the tester screen. HINT: Refer to the Techstream operator's manual for further details. Confirm that the beginning sensor reading is within the standard range. Standard range -3.2 to 3.2 kg (-7.0 to 7.0 lb) Place a 30 kg (66.2 lb) weight (e.g. a lead mass) onto the front passenger seat. Confirm that the sensitivity is within the standard range. Standard range 27 to 33 kg (59.5 to 72.8 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 assembly RH.