ASE Prep - EBCS, ABS, TCS, & ESC Exam Practice Questions and Answers

ASE Prep - EBCS, ABS, TCS, & ESC Exam Practice Questions and Answers The wiring harness from the right front ABS wheel speed sensor to the harness connector is badly damaged from corrosion, exposing the wires. Technician A says to carefully clean the damaged section and wrap the damaged area with black tape. Technician B says a badly corroded harness should be replaced. Who is correct? A only B only Both A and B Neither A nor B - Ans:-B only A diagnostic trouble code (DTC) representing the L/R wheel speed sensor is obtained in the ABS. This DTC may be caused by: an open circuit at the R/R wheel signal sensor. a grounded circuit on the L/R wheel sensor. ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 2/9 a larger tire than specified by the manufacturer on the R/F wheel. an open circuit in the electronic brake control - Ans:-a grounded circuit on the L/R wheel sensor. When the vehicle is in motion, the wheel speed sensor of an antilock brake system will: send a varying AC voltage signal to the ABS controller. send a 5-volt supply signal to the ABS controller. complete a circuit to ground when a fault occurs. send a modified digital square wave signal to the ABS controller. - Ans:-send a varying AC voltage signal to the ABS controller. An ABS hydraulic control unit (HCU) makes a clicking noise after the vehicle is started. Technician A says that this indicates a faulty control unit. Technician B says that this is the initial self-test of the HCU and is normal. Who is correct? A only B only Both A and B Neither A nor B - Ans:-B only ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 3/9 On ABS systems with a high-pressure accumulator, the accumulator is depressurized by: pumping the brake pedal 25 to 40 times with the ignition switch off. pumping the brake pedal 10 times with the ignition switch on. loosening the bleeder screw on the accumulator with the ignition switch on. loosening the front wheel bleeder screws with the ignition switch on. - Ans:-pumping the brake pedal 25 to 40 times with the ignition switch off. A vehicle with ABS is brought in due to a pedal pulsation. Technician A says some pedal pulsation is normal during hard braking with ABS. Technician B says the brake rotors may have excessive runout. Who is correct? A only B only Both A and B Neither A nor B - Ans:-Both A and B On an integral ABS with a high-pressure accumulator, Technician A says the master cylinder fluid level should be checked with a discharged accumulator. Te