2010 Toyota Highlander Owners Manual - Page 1351

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. Vehicles without navigation system Vehicles without smart key system: The indicator light flashes after the key has been removed from the engine switch to indicate that the system is operating. The indicator light stops flashing after the registered key has been inserted into the engine switch to indicate that the system has been canceled. Vehicles with smart key system: The indicator light flashes after the "ENGINE START STOP" switch has been turned OFF to indicate that the system is operating. The indicator light stops flashing after the "ENGINE START STOP" switch has been turned to ACCESSORY or IGNITION ON mode to indicate that the system has been canceled. ∗: If equipped 120