System Outline

The SRS is a driver protection device which has a supplemental role to the seat belts.

When the ignition SW is turned to ACC or ON, the current from the CIG fuse flows to TERMINAL 6 of the airbag sensor assembly. Only when the ignition SW ON, the current from the IGN fuse flows to TERMINAL 5 of the airbag sensor assembly. If an accident occurs while driving, deceleration caused by a frontal impact is detected (by sensor) and when the frontal impact exceeds a set level, the current from the CIG or IGN fuse flows to TERMINAL 6 or 5 of the airbag sensor assembly. This current flows to TERMINAL 14 to TERMINAL 1 of the airbag squib (Steering wheel pad) to TERMINAL 2 to TERMINAL 13 of the airbag sensor assembly, and also flows to TERMINAL 11 of the airbag sensor assembly to TERMINAL (C) 2 of the passenger airbag cut OFF SW to TERMINAL (B) 2 to TERMINAL 1 of the airbag squib (Front passenger airbag assembly) to TERMINAL 2 to TERMINAL (B) 1 of the passenger airbag cut off SW to TERMINAL (C) 1 to TERMINAL 10 of the airbag sensor assembly. Furthermore, the current flows to TERMINAL 4 or 27 to GROUND, causing the airbag squibs to expand.

When the safing sensor built into the airbag sensor assembly is ON, airbag sensor is OFF and the current from the CIG or IGN fuse flows same as above-mentioned flowing, causing the airbag squibs to expand. When the safing sensor built into the airbag sensor assembly is ON, the airbag sensor on one of the above-mentioned circuits is activated so that current flows to the airbag squibs and causes them to operate.

The airbag stored inside the steering wheel pad is instantaneously expanded to soften the shock to the driver.

The airbag stored inside the passenger's instrument panel is instantaneously expanded to soften the shock to the passenger.

FRONT PASSENGER AIRBAG CUT OFF OPERATION
When the passenger airbag cut off SW is ON, the current flowing from the CIG or IGN fuse to the airbag squib (Front passenger airbag assembly) is same as above, causing the airbag squib (Front passenger airbag assembly) to expand in an accident.

If the passenger airbag cut off SW is turned to OFF, the current flows from the CIG fuse to TERMINAL 1 of the passenger airbag cut off indicator to TERMINAL 4 to TERMINAL (A) 2 of the passenger airbag cut off SW to TERMINAL (A) 1 to GROUND, lighting the indicator up. Then the current between TERMINAL 11 of the airbag sensor assembly and the airbag squib (Front passenger airbag assembly) is cut off, so that it does not expand the airbag squib (Front passenger airbag assembly) in an accident.