2009 Toyota Corolla Owners Manual - Page 31

1-2. Opening, closing and locking the doors and trunk n Electronic key battery depletion l The standard battery life is 1 to 2 years. l The battery becomes depleted even if the electronic key is not used because the key always transmits radio waves. If the smart key system or the wireless remote control function does not operate, or the detection area becomes smaller, the battery may be depleted. Replace the battery when necessary. (→P. 343) 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 Recharging cellular phones or cordless phones 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.) n Note for the smart key system l Even when the electronic key is within the effective range (detection areas), the system may not operate properly in the following cases. • The electronic key is too close to the window or outside door handle, near the ground, or in a high place when the doors are locked or unlocked. • The electronic key is near the ground or in a high place, or too close to the rear bumper center when the trunk is unlocked. • The electronic key is on the instrument panel, package tray, floor, or in the auxiliary box of the driver's side instrument panel or glove box when the engine is started or "ENGINE START STOP" switch modes are changed. l As long as the electronic key is within the effective range, the doors may be locked or unlocked by anyone. 28