For 1990-2009 cars

With the key in the ignition switch, you can turn it to four different positions.

LOCK: This position locks your steering column in a vehicle with a manual transaxle. It is a theft-deterrent feature. You will only be able to remove your key when the ignition is turned to LOCK. If you have an automatic transaxle, the ignition switch cannot be turned to LOCK unless the shift lever is in PARK (P).

Notice: If your key seems stuck in LOCK/OFF and you cannot turn it, be sure you are using the correct key; if so, is it all the way in? If it is, then turn the steering wheel left and right while you turn the key hard. Turn the key only with your hand. Using a tool to force it could break the key or the ignition switch. If none of these work, then your vehicle needs service.

Caution: If you have a manual transaxle removing the key from the ignition switch will lock the steering column and result in a loss of ability to steer the vehicle. This could cause a collision. If you need to turn the engine off while the vehicle is moving, turn the key to ACC.

ACC (Accessory): This position operates some of your electrical accessories. It unlocks the steering wheel and ignition.
RUN: This is the position the switch returns to after you start your engine and release the switch. The switch stays in the RUN position when the engine is running. But even when the ignition is not running, you can use RUN to operate your electrical accessories and to display some warning and indicator lights.
START: This position starts the engine. When the engine starts, release the key. The ignition switch will return to RUN for normal driving. A warning tone will sound if you open the driver's door when the key has not been removed from the ignition.