2011 Lexus RX 450h Owners Manual - Page 138

1-3. Opening, closing and locking the doors n Battery-saving function If the vehicle is parked for a long period of time, the battery-saving function is activated in order to prevent the vehicle 12-volt battery from being discharged and the electronic key battery from being depleted. l In the following circumstances, unlocking the vehicle using the entry function 1 may take longer than usual: • When the entry function has not been used for 5 days or more • When the electronic key has been left within approximately 6 ft. (2 m) of the vehicle for 10 minutes or more l If the entry function has not been used for 14 days or more, the vehicle cannot be unlocked by a door other than the driver's door. To unlock the vehicle, grip the driver's door handle or use the wireless remote control or the mechanical key. The system will resume operation when: l The vehicle is locked using the lock sensor. l The vehicle is locked/unlocked using the wireless remote control function. Before driving (→P. 59) l The vehicle is locked/unlocked using the mechanical key. (→P. 624) n Conditions affecting operation The smart access system with push-button start uses weak radio waves. In the following situations, the communication between the electronic key and the vehicle may be affected, preventing the smart access system with push-button start, wireless remote control and immobilizer system from operating properly. (Ways of coping: →P. 624) l When the electronic key battery is depleted l Near a TV tower, electric power plant, gas station, radio station, large display, airport or other facility that generates strong radio waves or electrical noise l When carrying a portable radio, cellular phone, cordless phone or other wire- less communication devices 53