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Which security device can prevent cranking or running?

  • A.The immobiliser
  • B.The alarm system, which sounds when the vehicle is disturbed but does not affect the starting of the engine
  • C.The central locking
  • D.The steering lock, which prevents the vehicle from being steered and therefore from being driven away by a thief

Answer: A

An immobiliser checks a transponder in the key and blocks fuel, ignition or cranking until it is satisfied. Alarms genuinely include immobilisation on many systems, which makes the second option partly true. A steering lock is mechanical. Checking which component actually carries the load settles most questions of this kind at once. A symptom that appears under one condition and not another is what narrows the diagnosis quickly. Checking the units of each quantity catches a wrong formula before the arithmetic begins.

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