416 Auto Electricity and Electronics
Copyright by Goodheart-Willcox Co., Inc.
5. Explain the operation of an electronic height control
system.
6. List and describe the six major parts of a typical
electronic shock absorber system.
7. A(n) _____ _____ system uses hydraulic rams in place
of conventional suspension system springs and shock
absorbers.
8. Why is a power supply sometimes needed with an
electronic climate control system?
9. How can an ECM and solenoids control transaxle
shift points?
10. Explain how electric wedge brakes operate.
ASE Certifi cation-Type Questions
1. When discussing the operation of an automotive anti-
lock brake system, Technician A says ABS reduces a
vehicle’s stopping distance during panic stop conditions.
Technician B says ABS improves the directional stability
of the vehicle during panic stop conditions. Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
2. Technician A says some wheel speed sensors are
mounted on the vehicle’s steering knuckle assemblies.
Technician B says some wheel speed sensors are
mounted on the vehicle’s axle shafts. Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
3. Technician A says an ABS ECM uses wheel speed
sensor inputs to control the operation of the system’s
sensor rotors. Technician B says an ABS ECM uses
wheel speed sensor inputs to control the operation of
the system’s hydraulic actuator. Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
4. Technician A says an ABS hydraulic actuator
regulates the amount of fl uid pressure applied to each
wheel brake assembly. Technician B says the master
cylinder-booster assembly is an integral part of some
actuators. Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
5. Technician A says a fl uid reservoir is a basic part
of an anti-lock brake system’s hydraulic actuator.
Technician B says a pressure switch is a basic part of
an anti-lock brake system’s hydraulic actuator. Who
is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
6. Technician A says an electronic shock absorber system’s
shock actuators are solenoid-operated. Technician B
says the brake light switch often serves as a brake sensor
in an electronic shock absorber system. Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
7. Technician A says an active suspension system uses
pneumatic shock absorbers and hydraulic rams
to match suspension action to driving conditions.
Technician B says a hydraulic pump is used to operate
an active suspension system’s rams. Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
8. Each of the following is a basic component of an
electronic climate control system except:
(A) vacuum actuator.
(B) control module.
(C) pressure solenoids.
(D) vacuum diaphragms.
9. Technician A says an electronic cruise control system’s
vehicle speed sensor feeds AC output signals to the
throttle actuator. Technician B says an electronic cruise
control system’s throttle actuator moves the engine
throttle lever to control vehicle speed. Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
10. Technician A says that an electronic park assist system
uses an infrared sensor to detect the distance of an
object in front and behind vehicle. Technician B says
the electronic park assist system can turn the steering
wheel and drive the car automatically. Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.