2010 Lexus HS 250h Owners Manual - Page 534

5-2. Steps to take in an emergency To change "POWER" switch modes: Within 10 seconds of the buzzer sounding, release the brake pedal and press the "POWER" switch. Modes can be changed each time the switch is pressed. (→P. 148) To start the hybrid system: Press the "POWER" switch within 10 seconds of the buzzer sounding, keeping the brake pedal depressed. In the event that the hybrid system still cannot be operated, contact your Lexus dealer. n Stopping the hybrid system In the same method as the normal hybrid system stopping procedure, completely stop the vehicle and then press the "POWER" switch. 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. 453) n When the electronic key does not work properly Make sure that the smart access system with push-button start has not been deactivated in the customization setting. If it is off, turn the function on. (Customizable features →P. 572) 5 When trouble arises 535