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

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Driving an ABS vehicle is being discussed. Technician A pumps the brake pedal during hard braking. Technician B applies steady pressure to the brake pedal. Who is correct?

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Question 1

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Explain the difference between oversteer and understeer.

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Question 2

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Oversteer occurs when the rear wheels try to swing around or fishtail; understeer is a condition when the vehicle is slow to respond to steering changes.

What is the basic difference between a General Motors ABS and other typical systems?

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Question 3

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The ABS design uses a hydraulic modulator instead of a high-pressure pump and motor unit, accumulator, and fast-acting solenoid valves to control hydraulic pressure.

Automatic traction control (ATC)is being discussed. Technician A says vehicles with ATC typically do not have an antilock brake system. Technician B says ATC applies extra torque to a drive wheel that is spinning and losing traction. Who is correct?

(Multiple Choice)

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Question 4

Technician A says information from the wheel speed sensors is available to other control modules on the CAN network. Technician B says wheel speed sensors are AC generator-type sensors. Who is correct?

(Multiple Choice)

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Question 5

What does the brake pedal feel like when the ABS system is activated?

(Essay)

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Question 6

Pumping the brake pedal quickly during ABS activation will assist the antilock brake system to function properly.

(True/False)

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Question 7

Technician A says integral ABS systems use a vacuum-type power brake booster. Technician B says nonintegral ABS systems use a hydraulic-type power brake booster. Who is correct?

(Multiple Choice)

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Question 8

The ____________________ pump is used to provide pressurized hydraulic fluid for the ABS.

(Essay)

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Question 9

Technician A says some antilock brake systems use a lateral acceleration sensor in addition to the wheel speed sensors. Technician B says traction control systems apply one wheel brake to control oversteer while turning. Who is correct?

(Multiple Choice)

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Question 10

Technician A says the steering ability of the vehicle is reduced if the front wheels are locked. Technician B says the stability of the vehicle is reduced if the rear wheels are locked. Who is correct?

(Multiple Choice)

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Question 11

A tire on the verge of slipping produces less friction with respect to the road than one that is locked and skidding.

(True/False)

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Question 12

When the ABS is activated as a wheel begins to lock, the brake pedal will ______.

(Multiple Choice)

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Question 13

The function of the pressure switch in the hydraulic control unit is to ______.

(Multiple Choice)

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Question 14

What is the primary difference between automatic traction control systems and stability control systems?

(Essay)

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Question 15

If the brake fluid level is below minimum in an ABS, which warning lamp will turn on?

(Multiple Choice)

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Question 16

What is the difference between an accumulator and an ABS fluid accumulator?

(Essay)

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Question 17

Technician A says understeer is a condition where the vehicle is slow to respond to steering changes. Technician B says oversteer occurs when the rear wheels try to swing around or fishtail. Who is correct?

(Multiple Choice)

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Question 18

What is an electronic stability control system (ESC)?

(Essay)

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Question 19

While road testing a car equipped with an antilock brake system, Technician A says during heavy braking, several pulses may be felt through the brake pedal. Technician B says a spongy pedal during normal braking is acceptable. Who is correct?

(Multiple Choice)

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Question 20

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

Driving an ABS vehicle is being discussed. Technician A pumps the brake pedal during hard braking. Technician B applies steady pressure to the brake pedal. Who is correct?

Explain the difference between oversteer and understeer.

What is the basic difference between a General Motors ABS and other typical systems?

Automatic traction control (ATC)is being discussed. Technician A says vehicles with ATC typically do not have an antilock brake system. Technician B says ATC applies extra torque to a drive wheel that is spinning and losing traction. Who is correct?

Technician A says information from the wheel speed sensors is available to other control modules on the CAN network. Technician B says wheel speed sensors are AC generator-type sensors. Who is correct?

What does the brake pedal feel like when the ABS system is activated?

Pumping the brake pedal quickly during ABS activation will assist the antilock brake system to function properly.

Technician A says integral ABS systems use a vacuum-type power brake booster. Technician B says nonintegral ABS systems use a hydraulic-type power brake booster. Who is correct?

The ____________________ pump is used to provide pressurized hydraulic fluid for the ABS.

Technician A says some antilock brake systems use a lateral acceleration sensor in addition to the wheel speed sensors. Technician B says traction control systems apply one wheel brake to control oversteer while turning. Who is correct?

Technician A says the steering ability of the vehicle is reduced if the front wheels are locked. Technician B says the stability of the vehicle is reduced if the rear wheels are locked. Who is correct?

A tire on the verge of slipping produces less friction with respect to the road than one that is locked and skidding.

When the ABS is activated as a wheel begins to lock, the brake pedal will ______.

The function of the pressure switch in the hydraulic control unit is to ______.

What is the primary difference between automatic traction control systems and stability control systems?

If the brake fluid level is below minimum in an ABS, which warning lamp will turn on?

What is the difference between an accumulator and an ABS fluid accumulator?

Technician A says understeer is a condition where the vehicle is slow to respond to steering changes. Technician B says oversteer occurs when the rear wheels try to swing around or fishtail. Who is correct?

What is an electronic stability control system (ESC)?

While road testing a car equipped with an antilock brake system, Technician A says during heavy braking, several pulses may be felt through the brake pedal. Technician B says a spongy pedal during normal braking is acceptable. Who is correct?

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