Toyota T100 1996, Service Manual, Page: 1807 / 2062

Z14845
Safing Sensor
Fig.1
Power Source
Fig.2
Squib
Front
Airbag
Sensor
Center
Airbag
Sensor
RS − 6
− SUPPLEMENTAL RESTRAINT SYSTEM SRS AIRBAG
1996 TOYOTA T100 (RM449U)
(b) When the vehicle is involved in a frontal collision in the
hatched area (Fig. 1) and the shock is larger than the pre-
determined level, the SRS is activated automatically. A
safing sensor is designed to go on at a smaller decelera-
tion rate than the airbag sensor. As illustrated in Fig. 2,
ignition is caused when current flows to the squib, which
happens when a safing sensor and the airbag sensor go
on simultaneously. When deceleration force acts on the
sensors, squib in the driver airbag ignite and generate
gas. The gas discharging into the driver airbag rapidly in-
creases the pressure inside the bags, breaking open the
steering wheel pad.
Bag inflation then ends, and the bags deflate as the gas
is discharged through discharge holes at the bag’s rear or
side.