ASE A6 Electrical Electronics Practice Test

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6. There are codes indicating misfires at the number one and four cylinders of a four-cylinder engine. According to the diagram above, which of the following is causing this condition?

  • A. There is an open at point A in the system.
  • B. There is an open at point B in the system.
  • C. There is an open at point C in the system.
  • D. There is excessive resistance at point D of the system.

6.

Answer A is wrong. Point A is a common ground for both drivers. Drivers are transistors. The computer uses them to control different actuators, like the coils shown above, usually by grounding the control circuit.

Answer B is correct. An open at point B results in no voltage input to the coil and a misfire code at both the number 1 and 4 cylinders.

Answer C is wrong. An open in the 2-3 coil’s power circuit will result in a no-spark problem with that coil only.

Answer D is wrong. Resistance in the crankshaft position sensor’s circuit will result in a corrupt signal and most likely a no-spark condition at both coils.

7. Technician A says loose mounting can result in a weak horn. Technician B says loose mounting can cause an inoperative windshield wiper motor. Who is correct?

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

7.

Answer A is wrong. Electrical components that use the chassis ground will suffer high resistance in the ground circuit if the mounting bolts are loose.

Answer B is wrong. Many horns, windshield wiper motors, and aftermarket parts use the chassis/body ground.

Answer C is correct. Both technicians are correct.

Answer D is wrong. Both technicians are correct.

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8. The engine’s electric cooling fan in the illustration operates continuously whenever the ignition switch is ON, even when cold. Which of the following would result in this continuous fan motor operation?

  • A. Excessive resistance at point A of the system.
  • B. An open at point B in the system.
  • C. A short to ground at point C in the system.
  • D. An open at point D of the system.

8.

Engine cooling fan circuit answers.

Answer A is wrong. Resistance in the (ECT) engine coolant temperature sensor's circuit alters and weakens the signal from the sensor.

Answer B is wrong. An open at point B results in no fan operation. The control module is unable to control (ground) the open circuit.

Answer C is correct. A short to ground at point C activates the relay causing the fan to run when the ignition is switched on, even when the engine is cold.

Answer D is wrong. An open at point D prevents fan motor operation.

Electrical symbol.

9. The electrical symbol above is a:

  • A. Splice
  • B. Connector
  • C. Inductor
  • D. Resistor

9.

Electrical symbol.

Answer A is wrong. This is the standard symbol for a connector.

Answer B is correct. It's a universal symbol used in automotive schematics.

Answer C is wrong. Check for excessive resistance in a problem connector by performing a voltage drop test.

Answer D is wrong. Answer B is correct.

10. A technician is testing a pedal mounted brake switch with a voltmeter. When the brake pedal is depressed, the switch is receiving 12 volts, but no voltage is coming out. Technician A says with the brake pedal depressed there should be voltage present at both ends of the brake switch. Technician B says this condition indicates that there is an open in this brake switch. Who is correct?

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

10.

Answer A is wrong. When the pedal is depressed, the brake switch completes the circuit supplying power to the brake lights.

Answer B is wrong. Power should be present at both terminals of the brake switch when the brake pedal is applied.

Answer C is correct. Both A and B are correct.

Answer D is wrong. Both A and B are correct.