Normal operation
The ABS operates at speeds above 3 - 6 MPH (5 - 10 km/h). The speed varies according to road conditions.
When the ABS senses that 1 or more wheels are close to locking up, the actuator rapidly applies and releases hydraulic pressure. This action is similar to pumping the brakes very quickly. You may feel a pulsation in the brake pedal and hear a noise from under the hood or feel a vibration from the actuator when it is operating. This is normal and indicates that the ABS is operating properly.
However, the pulsation may indicate that road conditions are hazardous and extra care is required while driving.
See also:
Operating tips
● When the engine coolant temperature and
outside air temperature are low, the air flow
from the foot outlets may not operate for a
maximum of 150 seconds. However, this is
not a malfunction ...
Wheels and tires
If you have a flat tire, see “Flat tire” in the
“In case of emergency” section of this
manual. ...
Interior
The Sentra offers some innovative features for a compact car, including rear
cupholders that can hold 32-ounce cups and 20-ounce bottles; high-mounted
front-seatback pockets for backseat passenger ...