ELECTRICAL 2 FINAL (quiz/exam
questions)
1. A technician is measuring the resistance of a Tech A
coolant temperature sensor. At cold start the
resistance mea- sured 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 in- crease as resistance
decreases. Who is correct?
2. Technician A says a permanent magnet sensor is
con- Both structed of a permanent magnet inside
a coil of wire. Technician B says permanent
magnet sensor pro-
duces an AC voltage. Who is correct?
3. Technician A says a Hall Effect switch Both
produces a DC voltage. Technician B says a
Hall Effect switch pro- duces a square
waveform. Who is correct?
4. Technician A says a potentiometer is a voltage
divider Both circuit used to measure movement of
a component. Technician B says a
magnetoresistive sensor alters current flow
through the sense circuit when influ-
enced by the magnetic field. Who is correct?
5. A vehicle's fuel gauge is always indicating a problem?
full tank. All of the other instrument gauges
are operating cor- rectly. Which of the 6. Technician
following is the most likely cause of this A says in
most
1/
45
, ELECTRICAL 2 FINAL (quiz/exam
questions)
electromagnetic gauges, if the sending unit Shorted fuel gauge
resistance is low, the gauge will read low. sender unit
Technician B says in most electromagnetic
gauges, if the sending unit resistance is low,
the gauge will read high. Who is correct?
Tech B
2/
45
, ELECTRICAL 2 FINAL (quiz/exam
questions)
7. Technician A says that depending on the approachi
system con- figuration, either the Transponder ng a
Key ECU or ECM may need to be replaced if all locked
the keys to the vehicle are lost. Technician B vehicle?
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?
8. Technician A says While the concepts of
immobiliz- er components and operation are
similar among all systems, the specifics of
each system can vary signif- icantly.
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?
9. 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?
10. How long will the interior oscillators pulse if
the door courtesy switch is cycled and the
Engine/Power switch is not pressed?
11. Which components must be functioning if
the red light on the key flashes when
3/
45
, ELECTRICAL 2 FINAL (quiz/exam
questions)
Both
Tech B
30 seconds
Both
An exterior (door) oscilla-
tor, Cert. ECU, Door
lock control
receiver/Tuner
12. A vehicle equipped with smart key has an intermittent Both
no start condition. Technician A says defective stop
4/
45
questions)
1. A technician is measuring the resistance of a Tech A
coolant temperature sensor. At cold start the
resistance mea- sured 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 in- crease as resistance
decreases. Who is correct?
2. Technician A says a permanent magnet sensor is
con- Both structed of a permanent magnet inside
a coil of wire. Technician B says permanent
magnet sensor pro-
duces an AC voltage. Who is correct?
3. Technician A says a Hall Effect switch Both
produces a DC voltage. Technician B says a
Hall Effect switch pro- duces a square
waveform. Who is correct?
4. Technician A says a potentiometer is a voltage
divider Both circuit used to measure movement of
a component. Technician B says a
magnetoresistive sensor alters current flow
through the sense circuit when influ-
enced by the magnetic field. Who is correct?
5. A vehicle's fuel gauge is always indicating a problem?
full tank. All of the other instrument gauges
are operating cor- rectly. Which of the 6. Technician
following is the most likely cause of this A says in
most
1/
45
, ELECTRICAL 2 FINAL (quiz/exam
questions)
electromagnetic gauges, if the sending unit Shorted fuel gauge
resistance is low, the gauge will read low. sender unit
Technician B says in most electromagnetic
gauges, if the sending unit resistance is low,
the gauge will read high. Who is correct?
Tech B
2/
45
, ELECTRICAL 2 FINAL (quiz/exam
questions)
7. Technician A says that depending on the approachi
system con- figuration, either the Transponder ng a
Key ECU or ECM may need to be replaced if all locked
the keys to the vehicle are lost. Technician B vehicle?
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?
8. Technician A says While the concepts of
immobiliz- er components and operation are
similar among all systems, the specifics of
each system can vary signif- icantly.
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?
9. 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?
10. How long will the interior oscillators pulse if
the door courtesy switch is cycled and the
Engine/Power switch is not pressed?
11. Which components must be functioning if
the red light on the key flashes when
3/
45
, ELECTRICAL 2 FINAL (quiz/exam
questions)
Both
Tech B
30 seconds
Both
An exterior (door) oscilla-
tor, Cert. ECU, Door
lock control
receiver/Tuner
12. A vehicle equipped with smart key has an intermittent Both
no start condition. Technician A says defective stop
4/
45
