2009 Lexus IS 350 Owners Manual - Page 77
2009 Lexus IS 350 Manual
Page 77 highlights
1-6. Theft deterrent system Engine immobilizer system The vehicle's keys have built-in transponder chips that prevent the engine from starting if the key has not been previously registered in the vehicle's on-board computer. Never leave the keys inside the vehicle when you leave the vehicle. 1 The indicator light flashes after the "ENGINE START STOP" switch has been turned OFF to indicate that the system is operating. Before driving n System maintenance The vehicle has a maintenance-free type of engine immobilizer system. n Conditions that may cause the system to malfunction l If the grip portion of the key is in contact with a metallic object l If the key is in close proximity to or touching a key to the security system (key with a built-in transponder chip) of another vehicle 77