Normal operation
The ABS operates at speeds above 3 to 6 MPH (5 to 10 km/h). The speed varies according to road conditions.
When the ABS senses that one 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:
Backing up on a steep downhill
When backing up the vehicle down a hill, the
distance guide lines and the vehicle width guide
lines are shown farther than the actual distance.
For example, the display shows 3 ft (1.0 m) to the
...
Safety
At this time, the Sentra has not been crash tested by the Insurance Institute
for Highway Safety. Standard safety features include antilock brakes with
electronic brake-force distribution, active ...
Pulling a stuck vehicle
WARNING
To avoid vehicle damage, serious personal
injury or death when recovering a
stuck vehicle:
● Contact a professional towing service
to recover the vehicle if you have any
questions ...