2009 Lexus IS 350 Owners Manual - Page 29

1-2. Opening, closing and locking the doors and trunk n Battery-saving function In the following circumstances, the entry function is disabled in order to prevent the vehicle and electronic key batteries from discharging. l When the entry function has not been used for a month or more l When the electronic key has been left within approximately 3 ft. (1 m) of the vehicle for 10 minutes or more The system will resume operation when l The vehicle is locked using the door handle lock switch. l The vehicle is locked/unlocked using the wireless remote control function. (→P. 36) l The vehicle is locked/unlocked using the mechanical key. (→P. 417) n Electronic key battery depletion l The standard battery life is 1 to 2 years. (The card key battery life is about a year and a half.) l The battery becomes depleted even if the electronic key is not used because the key always transmits radio waves. If the smart access system with push-button start or the wireless remote control does not operate, or the detection area becomes smaller, the battery may be depleted. Replace the battery when necessary. (→ P. 345) l To avoid serious deterioration, do not leave the electronic key within 3 ft. (1 m) of the following electrical appliances that produce a magnetic field TVs Personal computers Cellular phones, cordless phones and battery chargers Recharging cellular phones or cordless phones Glass top ranges Table lamps n To operate the system properly Make sure to carry the electronic key when operating the system. Do not get the electronic key too close to the vehicle when operating the system from the outside of the vehicle. Depending on the position and holding condition of the electronic key, the key may not be detected correctly and the system may not operate properly. (The alarm may go off accidentally, or the door lock prevention may not function.) 30