Deck 59: Anti-Lock Brakes Traction and Stability Control

Question 1

13)Which of the following statements is LEAST-Likely true?

A) Fluid can be checked for moisture contamination using an electronic moisture tester.
B) Silicone brake fluids are hygroscopic.
C) Do not use DOT 5 (synthetic) brake fluid with ABS.
D) An annual fluid flush is a good recommendation with ABS.

Answer 1

B

Question 2

19)The ABS is sometimes used to limit the amount the wheels can spin during acceleration. This is called a(n) ____________________ or acceleration slip regulation (ASR).

Answer 2

traction control system (TCS),traction control system,TCS

Question 3

3)Many rear-wheel-drive ABS vehicles have a sensor mounted in the differential.

Answer 3

True

Question 4

16)Most newer cars are equipped with computerized ____________________ to limit the amount the wheels can lock up.

Question 5

15)The tool that will MOST-Likely ask you to check a wheel speed sensor for AC voltage output is the:

A) lateral acceleration sensor
B) antilock brake controller
C) wheel speed sensor
D) diagnostic flow chart

Question 6

11)All of the following statements are true EXCEPT:

A) one way to test for ABS operation is to test-drive the vehicle in an empty parking lot.
B) electrical problems are diagnosed using the vehicle's on-board diagnostics.
C) a red light warns the driver that the parking brake is applied.
D) an amber light is the typical hydraulic system warning light.

Question 7

5)The integral ABS brake system reservoir is usually much smaller than a normal brake system reservoir.

Question 8

2)A pulsating pedal during a non-ABS stop could be due to a warped brake drum or thickness variations in a disc rotor.

Question 9

9)During a two-wheel ABS stop, the isolation valve closes to prevent further hydraulic pressure from reaching the ____.

A) wheel speed sensor
B) front brakes
C) rear brakes
D) solenoid

Question 10

10)Which of the following is LEAST-Likely to be monitored by computer modules as part of an ESC program?

A) Backing plate
B) Wheel speed sensor
C) Yaw rate sensor
D) Steering wheel angle sensor

Question 11

17)If a wheel locks up, a(n) ____________________ pulsates the pressure to that wheel in much the same manner as a race car driver pumps the brakes during a turn to avoid a skid.

Question 12

12)____ is when the ABS operates when it is not supposed to.

A) Overhaul
B) Deceleration
C) False modulation
D) Decay

Question 13

4)AC waveforms are prone to radio frequency interference (RFI) with their signals.

Question 14

7)All of the following statements are true EXCEPT:

A) four-wheel ABS can be either three channel or four channel.
B) the most effective ABS is the three-channel system with a sensor monitoring each wheel.
C) a three-channel system has a sensor at each front wheel, and the rear works like a single-channel, two-wheel system.
D) most rear-wheel drives and some front-wheel drives use three-channel systems.

Question 15

1)A slip rate of 50% means that the wheel is rolling at 25% slower speed than a freely rolling tire at the same vehicle speed.

Question 16

18)In most ABS, ____________________ valves cycle the hold and release of hydraulic system pressure.

Question 17

6)The sensor that is MOST-Likely used on some antilock systems to measure "yaw" forces encountered while turning is the:

A) wheel speed sensor
B) traction control sensor
C) brake sensor
D) lateral acceleration sensor

Question 18

20)____________________ applies the brakes to a wheel that is spinning in mud or on ice, sending the torque to the wheel on the other side of the vehicle.

Question 19

14)While having a discussion, Technician A says that the majority of ABS problems result from failure of a wheel speed sensor. Technician B says that some wheel speed sensors fail because of exposure to harsh operating conditions, and others fail due to abuse. Who is correct?

A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question 20

8)While having a discussion, Technician A says that having a sensor at each wheel means that the ABS is four channel. Technician B says that having a sensor at each wheel does not necessarily mean that the ABS is four channel. Some three-channel systems have four-channel braking. Who is correct?

A) A only
B) B only
C) Neither A nor B
D) Both A and B

Question 21

25)Briefly describe a safe and easy way to flush all brake systems when you do not have a dedicated scan tool for the vehicle.

Question 22

22)List five examples of nonintegral ABS applications.

Question 23

21)List five components of hydraulic circuitry.

Question 24

24)How can you reduce an engine's power output?

Question 25

23)Briefly describe the stages of ABS solenoid operation.