2007 Lexus GS 350 Owners Manual - Page 560

5-2. Steps to take in an emergency Changing engine switch modes and starting the engine STEP 1 STEP 2 Put the shift lever in "P" and apply the brakes. Touch the Lexus emblem side of the electronic key to the engine switch. An alarm will sound to indicate that the start function cannot detect the electronic key that is touched to engine switch if any of the doors is opened and closed while the key is touched to the switch. To change engine switch modes: Within 5 seconds of the buzzer sounding, release the brake pedal and press the engine switch. Modes can be changed each time the switch is pressed. (→P. 97) To start the engine: Press the engine switch within 5 seconds after the buzzer sounds, keep the brake pedal depressed. In the event that the engine still cannot be operated, contact your Lexus dealer. STEP 3 5 n Stopping the engine Shift the shift lever to P and press the engine switch as you normally do when stopping the engine n Replacing the key battery When trouble arises As the above procedure is the temporary measure, it is recommended that the electronic key battery be replaced immediately when the battery depletes. (→P. 411) 487