ELECTRICAL 2 FINAL EXAM STUDY GUIDE QUESTIONS WITH COMPLETE SOLUTIONS

ELECTRICAL 2 FINAL EXAM STUDY GUIDE QUESTIONS WITH COMPLETE SOLUTIONS A technician is measuring the resistance of a coolant temperature sensor. At cold start the resistance measured 2KὨ. After the vehicle is fully warmed up, the resistance measures 200Ὠ. Technician A says the coolant sensor is operating normally. Technician B says voltage drop at the coolant sensor should increase as resistance decreases. Who is correct? - Correct Answer Tech A Technician A says a permanent magnet sensor is constructed of a permanent magnet inside a coil of wire. Technician B says permanent magnet sensor produces an AC voltage. Who is correct? - Correct Answer Both Technician A says a Hall Effect switch produces a DC voltage. Technician B says a Hall Effect switch produces a square waveform. Who is correct? - Correct Answer Both Technician A says a potentiometer is a voltage divider circuit used to measure movement of a component. Technician B says a magnetoresistive sensor alters current flow through the sense circuit when influenced by the magnetic field. Who is correct? - Correct Answer Both A vehicle's fuel gauge is always indicating a full tank. All of the other instrument gauges are operating correctly. Which of the following is the most likely cause of this problem? - Correct Answer Shorted fuel gauge sender unit Technician A says in most electromagnetic gauges, if the sending unit resistance is low, the gauge will read low. Technician B says in most electromagnetic gauges, if the sending unit resistance is low, the gauge will read high. Who is correct? - Correct Answer Tech B Technician A says that depending on the system configuration, either the Transponder Key ECU or ECM may need to be replaced if all the keys to the vehicle are lost. Technician B says that later systems were modified so that the ECM or Transponder Key ECU could be reset to accept registration of new keys. Who is correct? - Correct Answer Both Technician A says While the concepts of immobilizer components and operation are similar among all systems, the specifics of each system can vary significantly. Technician B says that for security reasons, immobilizer systems with a separate Transponder Key ECU are designed so that the vehicle will not start if either the ECM or ECU have been replaced. Who is correct? - Correct Answer Both Technician A says the oscillators transmit using UHF waves. Technician B says that keeping the Smart Key near electronic devices may cause the battery to wear out prematurely. Who is right? - Correct Answer Tech B How long will the interior oscillators pulse if the door courtesy switch is cycled and the Engine/Power switch is not pressed? - Correct Answer 30 seconds