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Which system intervenes when the vehicle begins to yaw out of control?

  • A.Traction control, which prevents wheelspin during acceleration and therefore keeps the vehicle pointing straight
  • B.Anti-lock braking
  • C.Brake assist, which detects an emergency application and applies the maximum pressure available at every wheel
  • D.Electronic stability control

Answer: D

Stability control compares the driver's steering input with the actual yaw rate and brakes an individual wheel to generate a correcting moment. It needs a yaw sensor and a steering angle sensor beyond the anti-lock hardware. It is mandatory on new vehicles. A symptom that appears under one condition and not another is what narrows the diagnosis quickly. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision.

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