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Which first check applies to a vehicle that is completely unresponsive?

  • A.The gateway module, which is the single point through which every network communicates and is therefore suspect
  • B.The fault codes
  • C.The state of charge of the battery together with the security of the main supply and earth connections
  • D.Battery voltage and the main earth connections

Answer: D

A flat or poorly connected battery mimics a total network failure and is far more common. The last option states that check in full, which makes it a correct and more thorough version of the same answer. Naming what changes and what stays the same is the reliable route through questions of this shape. Most errors here come from carrying across a result from a neighbouring case where it does not hold. Checking which component actually carries the load settles most questions of this kind at once.

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