Deck 108: Electronic Stability Control Systems

Question 1

The electronic stability control (ESC) system requires that the vehicle be equipped with what type of brake system?

A)Three channel ABS
B)Front disc with rear rum brakes
C)Four-wheel disc brakes
D)Four channel ABS

Answer 1

Four channel ABS

Question 2

Which Federal Motor Vehicle Safety Standard requires electronic stability control to be on all vehicles by 2011?

A)126
B)113
C)101
D)109

Answer 2

126

Question 3

What is the name of the standard test that is performed to verify ESC operation?

A)Sine with dwell
B)Anti-skid test
C)ESC plus
D)Vehicle stability enhancement test

Answer 3

Sine with dwell

Question 4

What other name is used to describe an electronic stability control (ESC) system?

A)Vehicle Dynamic Control (VDC)
B)Vehicle Stability Assist (VSA)
C)Electronic Stability Program(ESP)
D)Any of the above

Question 5

Which sensor is used by the ESC controller to determine the driver's intended direction?

A)Lateral acceleration sensor
B)Yaw sensor
C)Vehicle speed (VS) sensor
D)Steering wheel (handwheel) position sensor

Question 6

A diagnostic trouble code (DTC) has been set for a fault with the lateral acceleration sensor or circuit. What test could be performed to check if the sensor is working?

A)Unplug it and see if the scan tool reads 1.0 G
B)Drive the vehicle in a circle to see if the scan tool reads 0.0 G
C)Disconnect the sensor and hold it sideways to see if the scan tool reads 0.0 G
D)Disconnect the sensor and hold it sideways to see if the scan tool reads 1.0 G

Question 7

A lateral acceleration sensor is usually located where in the vehicle?

A)Under the front seat
B)On the package shelf
C)In the center console
D)Any of the above locations

Question 8

If a vehicle tends to continue straight ahead while cornering, the condition is called ________.

A)Tight
B)Plowing
C)Understeer
D)All of the above

Question 9

Traction control uses the antilock braking system and other devices to limit ________ of the drive wheel during acceleration.

A)Side slip
B)Positive slip
C)Negative slip
D)None of these

Question 10

A traction control system can often control all of these EXCEPT ________.

A)Upshift the transmission
B)Limit torque delivered to the drive wheels
C)Engage four-wheel drive
D)Apply the wheel brake to the wheel that is losing traction

Question 11

Some antilock braking systems use a yaw sensor. Where is this sensor usually mounted?

A)In the front of the vehicle near the radiator
B)Attached to or near the brake pedal assembly
C)Inside the vehicle under a seat
D)On the master cylinder

Question 12

Traction control is being discussed. Technician A says that the computer locks both drive wheels together when one drive wheel starts to slip. Technician B says that first the brakes are applied then the engine power is reduced. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 13

Technician A says that many traction control systems reduce engine torque to help the drive wheels achieve traction. Technician B says that hydraulic pressure from the electrohydraulic unit supplies brake fluid pressure to the wheel brake that is spinning during a traction control event. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 14

Technician A says that some vehicles with the Stabilitrak system continuously monitor wheel speed conditions and modulate hydraulic force to individual wheels to maintain stability. Technician B says that vehicles using traction control systems can reduce engine torque in slippery driving conditions. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 15

The driver of a vehicle with ESC has turned OFF the stability control system. What will happen the next time the vehicle is driven?

A)The ESC system will return to its default ON status.
B)The ESC system will remain OFF until turned back on by the driver.
C)It will depend on which driver of the vehicle enters the vehicle.
D)None of these

Question 16

The hand wheel position sensor is located ________.

A)On the steering rack assembly
B)Under the driver's side carpet
C)In the air bag clock spring
D)In the steering column

Question 17

During a traction control event, which of the following strategies is usually applied first?

A)Reduce engine torque
B)Apply the drive wheel brakes
C)Either A or B depending on conditions
D)Neither A nor B

Question 18

In this drawing, the vehicle's intended track is "A." If driven a little too fast, the actual track is "B." This condition is known as ________.

A)Understeer
B)Delayed steer
C)Left hand drift
D)Oversteer

Question 19

A flashing ESC lamp indicates a problem with the ESC system.

Question 20

The steering wheel position sensor provides signals related to steering wheel position and size.