ABS still gets to control the brake line pressure so that equally the turnability, the direction stability as well as the rate of deceleration are maintained when severe brakes are applied and on most types of surfaces so that each wheel rotation is checked in turn. Actuator assembly includes an electric hydraulic pump and three solenoid valves for the wheels as to supply hydraulic pressure to the braking system. The current that these speed sensors pick from each wheel is sine wave current, and it travels to the ABS control unit, the brain of this system that compares current wheel speed with normal speed and controls hydraulic pressure to prevent lock-up. The control unit also performs a self-test when the vehicle exceeds four mph and the ABS warning light will flicker. If the warning light is on, it means the system requires attention, although the determination of the problem is not always straightforward, but to get a DTC, certain procedures vary with year, make, and model. The basic checks are aimed at checking brake fluid, electrical connection, fuses, and brake parts. If there are trouble codes, then by grounding a certain terminal, it can be cleared and for the warning light to remain on, professional help should be sought.