ASE A6 Electrical Electronics Practice Test

7. The engine's electric radiator cooling fan motor illustrated above does not operate unless commanded ON with a bidirectional scan tool. Technician A says the vehicle most likely has a faulty fan relay. Technician B says a faulty engine coolant temperature sensor or circuit would result in this condition. Who is correct?

  • A. Technician A
  • B. Technician B
  • C. Both A and B
  • D. Neither A or B

7.

Answer A is wrong. The relay and the circuit work when commanded ON by the scan tool.

Answer B is correct. Use the scan tool's bi-directional control to eliminate the controller's output, the fan motor, and the circuit as the cause. A problem with the engine coolant temperature circuit would result in this condition.

Answer C is wrong. Technician B is correct.

Answer D is wrong. Technician B is correct.

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