Air Bag Sensor Assembly
WARNING: This page is about a different car, the 2002 Toyota Celica. However, it is still accessible from the selected car via links, so may be relevant.
The air bag sensor assembly is located under center on instrument panel on transmission tunnel. It consists of an air bag sensor and safing sensor, and diagnosis, ignition control and drive circuits. It receives signals from the air bag sensors and determines whether air bag modules must be deployed or not.