1.Ignition judgement and conditions
(1)Front collision
When both the deceleration sensor and safing sensor in the center airbag sensor assembly turn on, the driver airbag, front passenger airbag and seat belt pretensioners are ignited.
The center airbag sensor assembly switches the threshold level that should be activated according to the signal from the front airbag sensors (front satellite sensor).
The safing sensor of the center airbag sensor assembly is designed to be turned on by a smaller deceleration rate than the deceleration sensor.
There used to be a three sensor type in which the driver airbag, front passenger airbag and seat belt pretensioners were ignited when the front airbag sensor turned on or the deceleration sensor in the center airbag sensor assembly turned on, and the safing sensor in the center airbag sensor assembly turned on.
There also used to be a one sensor type that had no front airbag sensor and performed all the control only with the airbag sensor assembly.
(2)Front side collision
The safing sensor of the center airbag sensor assembly is designed to be activated by a smaller deceleration rate than the deceleration sensor of the side airbag sensor. As illustrated, ignition of the side airbag and curtain shield airbag is caused when current flows to the initiator, which happens when a safing sensor and the deceleration sensor go on simultaneously.
Some model with E-type SRS airbags have a safing sensor in the side airbag sensor.
Vehicle with side door sensor
When the safing sensor in the center airbag sensor assembly turns on and the deceleration sensor in the side door sensor or in the side airbag sensor is on, the side airbag and curtain shield airbag are ignited.
(3)Rear side collision
When both the safing sensor and the deceleration sensor in the curtain shield airbag sensor turn on, the curtain shield airbag is deployed.
Some models have a safing sensor outside the curtain shield airbag sensor and control with the safing sensor in the center airbag sensor assembly.