Here's what happens when you fully depress the brake pedal in a vehicle with ABS:
1. The brake fluid pressure increases, causing the brake pads or shoes to press against the brake rotors or drums.
2. The ABS control module receives signals from wheel speed sensors that monitor the rotational speed of each wheel.
3. If the ABS control module detects that a wheel is about to lock up (stop spinning), it will reduce the brake fluid pressure to that wheel.
4. This allows the wheel to regain traction and continue rotating, preventing a skid.
5. The ABS control module will rapidly repeat this process of reducing and increasing brake fluid pressure to each wheel, preventing the wheels from locking up and allowing you to maintain control of the vehicle while braking.
The pulsating or vibrating sensation in the brake pedal is caused by the rapid cycling of the brake fluid pressure. This is normal and should not be a cause for concern. It indicates that the ABS system is working properly and helping to prevent wheel lock-up during braking.
