Chapter 11

Question 1

Compare how fatality rates for miles traveled have been reduced.

Question 2

Explain what brought on the development of ABS braking and why.

Answer 2

the loss of vehicle control because to the rear wheels locking and causing a spin from which the driver could not correctc

Question 3

Explain how the rear wheels were controlled on the original rear-wheel antilock brakes such as RWAL or RABS.

Answer 3

The rear wheels were controlled as a pair

Question 4

Explain the difference between three- and four-channel ABS brakes.

Question 5

Explain what is meant by understeer.

Answer 5

was driving too fast for weather conditions or the condition of the tires or vehicle and the front wheels lost traction.

Question 6

Explain what is meant by the term oversteer.

Answer 6

Over steer is the loss of traction at the rear wheels leading to a vehicle spin.

Question 7

Describe the first response to wheel slip by the traction control.

Question 8

Explain how computer-controlled hydraulic steering works.

Question 9

Briefly explain how active braking systems operate.

Question 10

Explain the use of a yaw sensor.

Question 11

By some estimates, as many as ________ percent of all accidents are caused by driver inattention.

Answer 11

95

Question 12

Computer _______ inside the vehicle allowed the ECM, BCM, ABS, and stability control (VSC) modules to react as one to prevent crashes.

Answer 12

networks

Question 13

Traction control is basically the _______ of ABS.

Answer 13

opposite

Question 14

The ________ sensor is a dual sensor that is mounted on a torsion bar inside the steering column.

Answer 14

torque

Question 15

The Toyota Prius uses ________ braking that begins as soon as the accelerator pedal is released by activating the motor/generator.

Question 16

_______ braking systems will build increased pressure from the master cylinder in the event of a panic stop.

Question 17

The Toyota Prius uses two motor generators: ______ _______.

Question 18

The KIA Optima Hybrid uses a ________ driven starter generator to help slow the vehicle during deceleration.

Question 19

Electronic or electrically controlled steering began in the ________.

Question 20

Active ride control works with the vehicles struts/shock absorbers to prevent _______ roll _______ in hard turns.

Question 21

Technician A says that the ABS was the first step on the road to stability control systems.

Technician B says that ABS brakes allow the driver to control the vehicle when braking.

Who is correct?

Answer 21

c

Question 22

Technician A says that a direct TPMS sensor transmits a signal to the TPMS module concerning tire pressure.

Technician B says that some TPMSs use temperature sensors to determine an overheating tire.

Who is correct?

Question 23

Technician A says the steering torque sensor tells the VSC module how hard the driver is turning the steering wheel.

Technician B says the steering wheel position sensor is also used as an input to the stability control.

Who is correct?

Question 24

Technician A says an air spring suspension can control body roll.

Technician B says an air spring suspension cannot be used to control ride height.

Who is correct?

Question 25

While discussing the VSC module, Technician A says the VSC computer works in cooperation with the other computers in the vehicle network to provide stability control. Technician B says that the VSC module stands alone and does not need to communicate with the vehicle network. Who is correct?

Question 26

Technician A says that reducing torque to the wheels can help prevent loss of traction. Technician B says that starting out in a lower gear can reduce torque to the wheels. Who is correct?

Question 27

The Toyota Prius uses two electric motor generators: MG1 and MG2. Technician A says that MG1 is used as a generator when braking and on deceleration. Technician B says that MG2 is used as the main drive electric motor. Who is correct?

Question 28

Technician A says the TAC module has direct control of the throttle position. Technician B says that the ECM can command the TAC to find the best throttle position for the conditions. Who is correct?

Question 29

Technician A says the Distronic system is a cruise control system. Technician B says the Distronic system can see drivers approximately 6,000 feet in front of the vehicle.

Question 30

Technician A says that the yaw sensor measures the actual turning angle that the vehicle is traveling. Technician B says that the steering angle sensor measures the direction that the driver is trying to steer. Who is correct?