Pic. 1.108. Toyota Corolla Verso airbags
Pic. 1.109. Toyota Corolla Verso Security System Block Diagram
Pic. 1.110. Block diagram of the frontal airbag system
In addition to the seat belts, to improve head and chest protection for the driver and front passenger, the vehicle is equipped with dual-stage airbags for the driver and front passenger. The airbag control system regulates the inflation of the airbags depending on the severity of the impact, the position of the seat, and whether or not the seat belts are fastened.
In addition to the seat belts, the vehicle is equipped with a driver's knee airbag to provide additional protection to the driver in the event of a frontal collision.
An airbag switch is standard on all models to disable the deployment of the front passenger's front and side airbags if necessary.
Side and curtain airbags protect the head and chest of the driver, front passenger and rear seat outboard passengers in the event of a side impact.
As a measure to prevent the power from being cut off in a collision, a backup power supply is installed in the airbag sensor unit, consisting of a capacitor and a voltage converter (dc to dc converter).
The airbag sensor module has a fuel cut control circuit that shuts off the fuel pump when any of the airbags are deployed (only on vehicles with petrol engines).
The new Corolla Verso uses an airbag system, which includes the equipment listed in table 1.40.
Table 1.40. Car equipment with airbags
* On request for vehicles in TERRA gradation
+: Standard
Frontal collision airbags
In case of frontal collisions, three airbags are provided: for the driver, front passenger and at the driver's knees. The pillows fill up at the same time. The driver's and front passenger's front airbags are inflated in two stages.
The airbag control system regulates the inflation of the airbags depending on the severity of the impact, the position of the seat, and whether or not the seat belts are fastened.
Two-stage airbags
To ensure filling in two stages, 2 sets of initiators and gas generators are installed in the pillows. The airbag sensor unit allows you to optimize the airbag inflation process by delaying the activation of the initiators.
Front airbag sensor
The front airbags use an electrical sensor (acceleration sensor).
The acceleration sensor is housed in the front airbag sensor. Depending on the deceleration of the vehicle in a frontal collision, the sensor is deformed and an electrical signal is generated. Accordingly, it is possible to accurately determine the force of the primary impact.
Driver seat position sensor
The seat position sensor, mounted on the driver's seat rail, detects the longitudinal position of the seat. In addition, a shielding plate is installed on the seat rail, which allows you to determine the position of the seat.
Pic. 1.111. Driver seat position sensor
The seat position sensor uses a Hall effect sensor and a magnet on the back (pic. 1.111).
Pic. 1.112. Seat Shielding Plate
If the shield plate is inside the encoder (between hall sensor and magnet), the position sensor detects that the seat has been moved back. If the shield plate is outside the position sensor, the sensor indicates that the seat has been moved forward (pic. 1.112).
Driver's knee airbag
The driver's knee airbag, located under the front panel in front of the driver's seat, consists of a bracket, a cover, an initiator and an airbag shell.
Pic. 1.113. Driver's knee airbag
In a frontal collision, the driver's knee airbag is inflated by a signal from the airbag sensor unit. It helps protect the rider by keeping the feet from moving forward (pic. 1.113).
Switch in the driver's seat belt buckle
The sensor in the seat belt buckle, consisting of an ejector with a plate, a Hall effect sensor and two magnets, is integrated into the front seat belt buckle.
Pic. 1.114. Switch in the driver's seat belt buckle
The plate ejector interrupts the magnetic flow between the two magnets. The Hall sensor sends this change to the airbag sensor module (pic. 1.114).
Airbag switch
A switch is included as standard to disable deployment of the front passenger's front and side airbags. The switch should be used if inflation of these airbags is undesirable, for example if a child seat is installed in the front seat.
Pic. 1.115. Airbag switch
The switch is installed on the side surface of the front panel on the passenger side. It is turned on and off with the mechanical key supplied with the remote control. If the airbag switch is set to «Off». («OFF»), the passenger's front and side airbags will not deploy in a collision (pic. 1.115).
If the front passenger airbags are disabled, a warning light will come on in the middle of the instrument panel.