0 (off) - The ignition is off.
When you switch the ignition off and leave your vehicle, do not leave your key in the ignition. This could cause your vehicle battery to lose charge.
I (accessory) - Allows the electrical accessories, such as the radio, to operate while the engine is not running.
Do not leave the ignition key in this position for too long. This could cause your vehicle battery to lose charge.
II (on) - All electrical circuits are operational and the warning lamps and indicators illuminate.
III (start) - cranks the engine.