2003 Nissan Altima Owner's Manual - Page 140

IGNITION SWITCH 2. Turn the ignition key slightly toward the ON position. 3. Turn the key to the LOCK position. 4. Remove the key. The shift selector lever is designed so it cannot moved out of P (Park) and into any of the other gear positions if the ignition key is turned to OFF position or if the key is removed from the switch. The shift selector lever can be moved if the ignition switch is in the ACC position. This allows the vehicle to be moved if the battery is discharged. The shift selector lever can also be moved if the ignition switch is in the ON position and the foot brake pedal is depressed. There is an OFF position between the LOCK and ACC positions. The OFF position is indicated by a "1" on the key cylinder. When the ignition is in the OFF position, the steering wheel is not locked. 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. WARNING Never remove or turn the key to the LOCK position while driving. The steering wheel will lock. This may cause the driver to lose control of the vehicle and could result in serious vehicle damage or personal injury. WSD0057 AUTOMATIC TRANSMISSION On automatic transmission models, the ignition lock is designed so the key cannot be turned to LOCK position and removed until the shift selector lever is moved to the P (Park) position. When removing the key from the ignition, make sure the shift selector lever is in the P (Park) position. If the key cannot be turned to the LOCK position, proceed as follows to remove the key. 1. Move the shift selector lever into the P (Park) position. 5-4 Starting and driving