Disabling & Activating Air Bag System: Notes
WARNING: This page is about a different car, the 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Accidental air bag deployment is possible. Personal injury may result. Back-up power supply maintains air bag system voltage for about 90 seconds after battery is disconnected. After disabling air bag system, wait at least 90 seconds before servicing air bag system.