Side Air Bag Sensor Assembly
WARNING: This page is about a different car, the 2002 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
The side air bag sensor assembly is mounted in right and left center pillar. It consists of an air bag sensor, safing sensor and diagnosis circuit. It receives signals from the side air bag sensor and determines whether side air bag module must be deployed or not.