ABS Basics

Understeer is when steering wheel is being turned more sharply then the vehicle is turning

• True

• False

Electronic stability control is designed to control

• tire traction during acceleration.

• understeer and oversteer

• limited slip differentials

• the wheel speed sensor signal stability

The antilock braking system, traction control system, and electronic stability control are all subsystems of:

• the powertrain communication system

• electronic ride control.

• electronic brake control.

• automatic shutdown.

Technician A says that the electronic brake control module monitors the wheel speed sensors for 30 seconds, once per drive cycle. Technician B says that the electronic brake control module has self-diagnostic capabilities and can set diagnostic trouble codes. Who is correct?

• Technician A

• Technician B

• Both Technician A and Technician B

• Neither Technician A nor Technician B

Technician A says that Hall-effect wheel speed sensors create an analog alternating current signal. Technician B says that variable reluctance wheel speed sensors create a digital direct current signal. Who is correct?

• Technician A

• Technician B

• Both Technician A and Technician B

• Neither Technician A nor Technician B

An antilock brake system that can control each wheel independently is considered a __________ system.

• two-channel

• three-channel

• four-channel

• single-channel

Technician A says that some electronic stability control systems can be deactivated. Technician B says that some electronic stability control systems can detect trailer sway. Who is correct?

• Neither Technician A nor Technician B

• Both Technician A and Technician B

• Technician B

• Technician A

Technician A says that the antilock brake system rapidly cycles the brakes among hold, release, and apply during panic stops. Technician B says that first-generation antilock brake systems create braking pressure without driver input. Who is correct?

• Neither Technician A nor Technician B

• Both Technician A and Technician B

• Technician B

• Technician A

Maximum braking occurs when the wheels are rotating __________ slower than the vehicle speed.

• 0% to 5%

• 10% to 20%

• 85% to 95%

• 100%

Which sensor tells the traction control module the driver’s intended direction?

• Steering angle sensor

• Roll-rate sensor

• Yaw sensor

• Wheel speed sensor