2009 Toyota Camry Owners Manual - Page 451
2009 Toyota Camry Manual
Page 451 highlights
5-2. Steps to take in an emergency n Stopping the hybrid system Shift the shift lever to P and press the "POWER" switch as you normally do when stopping the hybrid system. n Replacing the key battery As the above procedure is a temporary measure, it is recommended that the electronic key battery be replaced immediately when the battery is depleted. (→P. 322) 384