ELECTRICAL 2 FINAL EXAM 2026/2027 QUESTIONS
AND CORRECT ANSWERS CORRECT ANSWERS
GRADED A+
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?
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?
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?
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?
,Tech B
How long will the interior oscillators pulse if the door courtesy switch is cycled
and the Engine/Power switch is not pressed?
30 seconds
Which components must be functioning if the red light on the key flashes when
approaching a locked vehicle?
An exterior (door) oscillator, Cert. ECU, Door lock control receiver/Tuner
A vehicle equipped with smart key has an intermittent no start condition.
Technician A says defective stop light switch assembly could be the cause.
Technician B says electromagnetic interference from an outside source could be
the cause.
Both
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?
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?
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?
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?
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?
Shorted fuel gauge sender unit
Refer to the figure below. A 2012 Camry with Smart Key has a B27A2 DTC:
Open in Front Passenger Side Electrical Antenna Circuit. Technician A says front
door outside handle assembly RH (for front passenger door) could be at fault.
AND CORRECT ANSWERS CORRECT ANSWERS
GRADED A+
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?
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?
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?
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?
,Tech B
How long will the interior oscillators pulse if the door courtesy switch is cycled
and the Engine/Power switch is not pressed?
30 seconds
Which components must be functioning if the red light on the key flashes when
approaching a locked vehicle?
An exterior (door) oscillator, Cert. ECU, Door lock control receiver/Tuner
A vehicle equipped with smart key has an intermittent no start condition.
Technician A says defective stop light switch assembly could be the cause.
Technician B says electromagnetic interference from an outside source could be
the cause.
Both
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?
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?
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?
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?
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?
Shorted fuel gauge sender unit
Refer to the figure below. A 2012 Camry with Smart Key has a B27A2 DTC:
Open in Front Passenger Side Electrical Antenna Circuit. Technician A says front
door outside handle assembly RH (for front passenger door) could be at fault.
