Exam 53: Antilock Brake, Traction Control, and Stability Control Systems

An ATC system controls positive wheel spin by modulating hydraulic pressure applied to the brakes on the wheel that is spinning.

ATC systems are being discussed. Technician A says in order to use the brakes to control wheel spin, the ABS must have a pump to develop hydraulic pressure and an accumulator to store reserve pressure. Technician B says the pulse rings and wheel-speed sensors for ATC systems are located inside the transmission and are different from ABS wheel speed sensors. Who is correct?

Technician A says an integral-type ABS system uses accumulator pressure to provide power brake assist. Technician B says the integral ABS system uses accumulator pressure (boost pressure)to operate the rear brakes. Who is correct?

Antilock brake systems provide electronic/hydraulic ____________________ of the brakes for straight-line stopping during panic conditions.

The ABS control module is normally mounted to the master cylinder or is part of the hydraulic control unit.

Explain the difference between an integrated and a nonintegrated antilock braking system.

The rapid application and release of brake pressure used to prevent wheel lock is called ____________________.

ABS solenoid valves are electrically operated by signals from the control module.

The ABS pump motor switch turns the pump on and off to maintain 200 to 261 psi (1,379 to 1,800 kPa)of hydraulic pressure in the accumulator.

Antilock brake systems are highly effective in stopping a vehicle driving over loose snow.

ABS pressure modulation works to prevent wheel locking.