Podcast
Questions and Answers
The maximum traction between a tire and the road occurs when the tire is _______________.
The maximum traction between a tire and the road occurs when the tire is _______________.
slipping 10 to 20 percent
Antilock brakes cannot defy the laws of physics under what conditions? (Select all that apply)
Antilock brakes cannot defy the laws of physics under what conditions? (Select all that apply)
- Be able to stop the vehicle in a short distance under all conditions
- All (correct)
- When a vehicle enters a corner traveling faster than it is physically possible to negotiate the turn
- If the brakes are applied too late to bring the vehicle to a complete stop before impact
Tech A says that the ABS may not result in shorter stopping distance compared to brakes without ABS.
Tech A says that the ABS may not result in shorter stopping distance compared to brakes without ABS.
True (A)
Tech B says a pulsating brake pedal during normal braking is a characteristic feature of most ABS equipped vehicles.
Tech B says a pulsating brake pedal during normal braking is a characteristic feature of most ABS equipped vehicles.
What type of antilock brake system requires the use of four wheel speed sensors?
What type of antilock brake system requires the use of four wheel speed sensors?
Tech A says that some ABS use a sensor located in the rear axle pinion gear area.
Tech A says that some ABS use a sensor located in the rear axle pinion gear area.
Tech B says that all ABS use a wheel speed sensor at each wheel.
Tech B says that all ABS use a wheel speed sensor at each wheel.
Tech A says that most ABS units are non-integral.
Tech A says that most ABS units are non-integral.
Tech B says the ABS is disabled below about 5 mph.
Tech B says the ABS is disabled below about 5 mph.
Technician A says that ABS brakes are designed to allow the front wheel to be steered during heavy braking.
Technician A says that ABS brakes are designed to allow the front wheel to be steered during heavy braking.
Tech B says that the ABS dash warning light is amber.
Tech B says that the ABS dash warning light is amber.
A passive wheel speed sensor is also referred to as?
A passive wheel speed sensor is also referred to as?
An active wheel speed sensor is referred to as?
An active wheel speed sensor is referred to as?
Which part of an antilock brake system is used for tire pressure monitoring?
Which part of an antilock brake system is used for tire pressure monitoring?
Flashcards
Maximum tire traction
Maximum tire traction
Maximum traction occurs when the tire is slipping 10 to 20 percent.
ABS Limitations
ABS Limitations
ABS cannot defy physics under any conditions.
ABS Stopping Distance
ABS Stopping Distance
ABS may not always result in shorter stopping distances.
Pulsating Brake Pedal with ABS
Pulsating Brake Pedal with ABS
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Four-Channel ABS
Four-Channel ABS
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ABS Sensor Location
ABS Sensor Location
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Non-Integral ABS
Non-Integral ABS
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ABS Low-Speed Deactivation
ABS Low-Speed Deactivation
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ABS Steering Control
ABS Steering Control
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ABS Warning Light Color
ABS Warning Light Color
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Passive Wheel Speed Sensor
Passive Wheel Speed Sensor
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Active Wheel Speed Sensor
Active Wheel Speed Sensor
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Wheel Speed Sensors and Tire Pressure
Wheel Speed Sensors and Tire Pressure
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Study Notes
Tire Traction
- Maximum tire traction occurs when slipping is between 10 to 20 percent.
Antilock Brake Systems (ABS)
- ABS cannot overcome physics in the following situations:
- Entering a corner too fast.
- Brakes applied too late to prevent impact.
- Ineffective in stopping quickly under all conditions.
- ABS may not provide shorter stopping distances compared to traditional brakes.
- Pulsating brake pedal during normal braking is common in ABS-equipped vehicles.
ABS Types and Sensors
- The antilock brake system requiring four wheel speed sensors is a four-channel system.
- Some ABS setups utilize a rear axle pinion gear area sensor, while not all systems have a sensor at each wheel.
Technician Insights on ABS
- Most ABS units are classified as non-integral systems.
- ABS functionality is typically disabled below about 5 mph.
Steering and Indicators
- ABS allows steering control during heavy braking.
- The ABS dashboard warning light is amber in color.
Wheel Speed Sensors
- A passive wheel speed sensor is also known as a variable reluctance sensor.
- Active wheel speed sensors can be classified as either Hall effect or magneto resistive types.
Tire Pressure Monitoring
- Wheel speed sensors play a key role in tire pressure monitoring within an antilock brake system.
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