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:
Overview
The Altima is a mid-size car currently being manufactured by the Japanese
automaker Nissan, and is arguably a continuation of the "bloodline" that began
with the Nissan Bluebird in 1957. ...
Hazard warning flasher switch
Hazard warning flasher switch
Push the switch on to warn other drivers when
you must stop or park under emergency conditions.
All turn signal lights flash.
● If stopping for an emerge ...
Tire Pressure Monitoring System (TPMS)
Each tire, including the spare (if provided),
should be checked monthly when cold and
inflated to the inflation pressure recommended
by the vehicle manufacturer on the vehicle
placard or tire ...