1999 Nissan Pathfinder Owner's Manual - Page 161

Shift lock release If the battery charge is low, the select lever may not be moved from the P position even with the brake pedal depressed and the select lever button pushed. To move the select lever, push the shift lock release button and select lever button while the ignition key is in the ACC position. The select lever can be moved to N (Neutral). To push the shift lock release button, follow the procedure as illustrated. If there is any problem moving the lever out of P (Park) have your NISSAN dealer check the automatic transmission system as soon as possible. Accelerator downshift - In D position - For rapid passing or hill climbing, fully depress the accelerator pedal to the floor. This shifts the transmission down into second gear or first gear, depending on the vehicle speed. SSD0106 Overdrive switch Each time your vehicle is started, the transmission is automatically reset to overdrive on. If the selector lever cannot be moved from the P position while the engine is running and the brake pedal is depressed, the stop lights may not work. Malfunctioning stop lights could cause an accident injuring yourself and others. ON: For normal driving the overdrive switch is engaged. The transmission is upshifted into overdrive as the vehicle speed increases. The overdrive does not engage until the engine has warmed up. OFF: For driving up and down long slopes where engine braking would be advantageous, push the overdrive switch. The O/D OFF light illuminates. 5-12 Starting and driving