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Difficulty: Very hardBrake Failure Management

If a vehicle experiences total hydraulic service brake failure while traveling at highway speeds, pulling and continuously holding the Electronic Parking Brake (EPB) switch will engage a dynamic emergency braking program through the stability control system to slow the vehicle safely without instantly locking the rear wheels.

Answer: Answer

Answer

The statement is TRUE. Continuously holding the EPB switch during high-speed service brake failure initiates a regulated dynamic emergency braking sequence via the vehicle's electronic stability system.
The statement accurately reflects modern vehicle emergency systems. Holding the Electronic Parking Brake switch while in motion commands the electronic stability program to apply emergency braking force progressively and safely without causing immediate wheel lockup.

Step-by-Step Solution

1
Identify the vehicle system mechanism during service brake loss.
Recognize that service brake pedal failure leaves secondary electronic safety mechanisms active.
Understanding equipment design enables proper driver response during emergency mechanical failures.
2
Evaluate the operation of Electronic Parking Brake (EPB) systems in motion.
Determine that pulling and holding the EPB switch triggers dynamic anti-lock deceleration rather than static mechanical lockup.
EPB systems integrate with ABS/ESC units to safely modulate braking force across all wheels during high-speed actuation.

Key Concept

Modern Electronic Parking Brake (EPB) Dynamic Emergency Operation
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Topics

Brake Failure Management

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