2007 Toyota Prius Owners Manual - Page 51

INFORMATION D To maintain communication with the vehicle, smart keys use built −in battery power. The battery service life is about 1 to 3 years on average. If battery power becomes insufficient, replace the battery with a new one. If you do not intend to drive your vehicle for a long time, push the cancel switch to deactivate the smart function. INFORMATION 21p152 The smart function will be deactivated in the following cases: D The smart key continually receives electromagnetic waves, and if it receives strong electromagnetic waves over a period of time, the battery can be drastically run down. Therefore, avoid storing smart keys near any electrical appliances. Here is a list of electrical appliances which may have adverse effects on the smart key performance: TVs, personal computers, cellular phone or cordless phone recharger units, electric light stands and fluorescent desk lights Note that you should always keep such electrical appliances at least 1 m (3 ft.) away from the smart key. D The cancel switch is turned on. D The smart key is inserted into the key slot. D The battery of the smart key is discharged. 1. Smart function is on. 2. Smart function is off. DEACTIVATING THE SMART FUNCTION The cancel switch for this function is located at the bottom of the instrument panel on the driver side. When you push the switch, the smart function will be deactivated. Pushing the switch again will reactivate the function. When the smart function is deactivated, use a mechanical key or wireless remote control function key to lock and unlock the doors. To start the hybrid system, insert a smart key into the key slot. 34