Chapter 112 Electronic Stability Control Systems
Quiz by Matt Lobdell
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- Q1
Which sensor is used by the ESC controller to determine the driver's intended direction?
Vehicle speed (VS) sensor
Lateral acceleration sensor
Yaw sensor
Steering wheel (handwheel) position sensor
30s - Q2
The electronic stability control (ESC) system requires that the vehicle be equipped with what type of brake system?
Three-channel ABS
Four-wheel disc brakes
Four-channel ABS
Front disc with rear drum brakes
30s - Q3
Which Federal Motor Vehicle Safety Standard requires electronic stability control to be on all vehicles by 2011?
101
126
113
109
30s - Q4
What is the name of the standard test that is performed to verify ESC operation?
Vehicle stability enhancement test
Sine with dwell
ESC plus
Anti-skid test
30s - Q5
What other name is used to describe an electronic stability control (ESC) system?
Electronic Stability Program (ESP)
Vehicle Dynamic Control (VDC)
Vehicle Stability Assist (VSA)
Any of the above
30s - Q6
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?
Disconnect the sensor and hold it sideways to see if the scan tool reads 0.0 G
Drive the vehicle in a circle to see if the scan tool reads 0.0 G
Disconnect the sensor and hold it sideways to see if the scan tool reads 1.0 G
Unplug it and see if the scan tool reads 1.0 G
30s - Q7
A lateral acceleration sensor is usually located where in the vehicle?
On the package shelf
Under the front seat
In the center console
Any of the above locations
30s - Q8
Traction control uses the antilock braking system and other devices to limit ________ of the drive wheel during acceleration.
negative slip
positive slip
side slip
None of these
30s - Q9
When diagnosing ESC or TC system concerns, ________ is usually required.
a factory scan tool
specific service information (SI)
performing a visual inspection
All of the above
30s - Q10
A traction control system can often control all of these EXCEPT ________.
engage four-wheel drive
limit torque delivered to the drive wheels
upshift the transmission
apply the wheel brake to the wheel that is losing traction
30s - Q11
If a vehicle tends to continue straight ahead while cornering, the condition may be called ________.
understeer
tight
plowing
Any of the above
30s - Q12
Some antilock braking systems use a yaw sensor for the ESC system. Where could this sensor be mounted?
In the front of the vehicle near the radiator
Attached to or near the brake pedal assembly
Inside the vehicle under a seat
On the master cylinder
30s - Q13
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?
Technician A only
Technician B only
Both technicians
Neither technician
30s - Q14
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?
Technician A only
Technician B only
Both technicians
Neither technician
30s - Q15
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?
Technician A only
Technician B only
Both technicians
Neither technician
30s