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Which sensor allows the system to anticipate solar heat gain?

  • A.Nothing
  • B.A photodiode measuring the intensity and often the direction of sunlight, so each side may be compensated separately
  • C.A sun load sensor on the fascia
  • D.The exterior temperature sensor, which rises in sunlight and therefore indicates the solar load upon the vehicle

Answer: C

A sun load sensor lets the system cool the sunlit side more strongly. The last option describes exactly that capability, which makes it a correct and more detailed version of the same answer. Working the distinction through on a single concrete case fixes it more firmly than any rule of thumb. The shared behaviour explains why these belong together and the differences explain why both exist. A limit that survives making every external component ideal is an intrinsic one, and worth knowing for that reason.

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