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Which benefit does a zonal architecture give?

  • A.None
  • B.Reduced harness length and weight together with the ability to update function software centrally rather than per unit
  • C.Shorter harnesses and centralised software updating
  • D.A greater number of control units, which permits each function to be developed independently of the others

Answer: C

Wiring runs to the nearest zone controller rather than across the vehicle, saving weight and cost. The last option states both benefits, which makes it a correct and fuller version of the same answer. Working the distinction through on a single concrete case fixes it more firmly than any rule of thumb. Most errors here come from carrying across a result from a neighbouring case where it does not hold. The order in which the effects act is what decides the outcome, so it is worth establishing first.

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