See also:

Items to initialize
The following items must be initialized for normal system operation in cases such as after the 12-volt battery is reconnected, or maintenance is performed on the vehicle. ...

If the electronic key does not operate properly
If communication between the electronic key and vehicle is interrupted or the electronic key cannot be used because the battery is depleted, the smart access system with push-button start and wirele ...

Safety/Security Features
A reinforced front- and rear-structure passenger compartment forms the foundation for passive safety in the Lexus ES 350. In addition to advanced dual-stage front airbags and front seat-mounted si ...