2012 Nissan Xterra Owner's Manual - Page 208

There is an OFF position between the LOCK and ON positions. The OFF position is indicated by a "1" on the ignition switch. When the ignition is in the OFF position, the steering wheel is not locked (for models with a steering lock mechanism). In order for the steering wheel to be locked, it must be turned about 1/8 of a turn clockwise from the straight up position. To lock the steering wheel, turn the key to the LOCK position. Remove the key. To unlock the steering wheel, insert the key and turn it gently while rotating the steering wheel slightly right and left. If the key will not turn from the LOCK position, turn the steering wheel to the left or right while turning the key to unlock the key cylinder. KEY POSITIONS LOCK: Normal parking position (0) OFF: (Not used) (1) ACC: (Accessories) (2) This position activates electrical accessories such as the radio when the engine is not running. ON: Normal operating position (3) This position turns on the ignition system and the electrical accessories. START: (4) WSD0052 MANUAL TRANSMISSION (if so equipped) The ignition switch includes a device that helps prevent accidental removal of the key while driving. The key can only be removed when the ignition switch is in the LOCK position. On manual transmission models, to turn the ignition switch to the LOCK position from the ACC or ON position, place the ignition switch in the OFF position, push the key in, then place the ignition switch in LOCK position. This position starts the engine. As soon as the engine has started, release the key. It automatically returns to the ON position. NISSAN VEHICLE IMMOBILIZER SYSTEM The NISSAN Vehicle Immobilizer system will not allow the engine to start without the use of the registered key. Starting and driving 5-11