ELECTRICAL 2 FINAL (quiz/exam questions)
1. A technician is measuring the resistance of a coolant Tech A
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 produces a DC Both
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 full tank. Shorted fuel gauge
All of the other instrument gauges are operating cor- sender unit
rectly. Which of the following is the most likely cause
of this problem?
6. Technician A says in most electromagnetic gauges, Tech B
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?
, ELECTRICAL 2 FINAL (quiz/exam questions)
7. Technician A says that depending on the system con- Both
figuration, 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?
8. Technician A says While the concepts of immobiliz- Both
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 Tech B
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 30 seconds
courtesy switch is cycled and the Engine/Power switch
is not pressed?
11. Which components must be functioning if the red An exterior (door) oscilla-
light on the key flashes when approaching a locked tor, Cert. ECU, Door lock
vehicle? control receiver/Tuner
12. A vehicle equipped with smart key has an intermittent Both
no start condition. Technician A says defective stop
, ELECTRICAL 2 FINAL (quiz/exam questions)
light switch assembly could be the cause. Technician
B says electromagnetic interference from an outside
source could be the cause.
13. Refer to the figure below. A 2012 Camry with Smart Tech A
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. Technician B says front door
outside handle assembly LH (for driver's door) could
be at fault. Who is correct?
14. What component transmits the speed sensor signal to Skid control
the AFS ECU?
15. What does the headlight level actuator use to regulate Step motor
the angle of the reflectors?
16. Technician A says that AFS headlight control is deter- Tech A
mined using steering angle and vehicle speed inputs.
Technician B says that both low and high beams are
controlled by the AFS ECU. Who is correct?
17. AFS low speed swivel range is being discussed. Techni- Both
cian A says that during a right turn the left headlamp
angle is fixed. Technician B says that during a left turn
the left headlamp can swivel up to 15 degrees. Who is
correct?
18. Which of the following is an example of a piezoelectric Knock sensor
sensor? oil pressure gauge sender unit, knock sensor,
coolant temp sender unit, hall-effect sensor
1. A technician is measuring the resistance of a coolant Tech A
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 produces a DC Both
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 full tank. Shorted fuel gauge
All of the other instrument gauges are operating cor- sender unit
rectly. Which of the following is the most likely cause
of this problem?
6. Technician A says in most electromagnetic gauges, Tech B
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?
, ELECTRICAL 2 FINAL (quiz/exam questions)
7. Technician A says that depending on the system con- Both
figuration, 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?
8. Technician A says While the concepts of immobiliz- Both
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 Tech B
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 30 seconds
courtesy switch is cycled and the Engine/Power switch
is not pressed?
11. Which components must be functioning if the red An exterior (door) oscilla-
light on the key flashes when approaching a locked tor, Cert. ECU, Door lock
vehicle? control receiver/Tuner
12. A vehicle equipped with smart key has an intermittent Both
no start condition. Technician A says defective stop
, ELECTRICAL 2 FINAL (quiz/exam questions)
light switch assembly could be the cause. Technician
B says electromagnetic interference from an outside
source could be the cause.
13. Refer to the figure below. A 2012 Camry with Smart Tech A
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. Technician B says front door
outside handle assembly LH (for driver's door) could
be at fault. Who is correct?
14. What component transmits the speed sensor signal to Skid control
the AFS ECU?
15. What does the headlight level actuator use to regulate Step motor
the angle of the reflectors?
16. Technician A says that AFS headlight control is deter- Tech A
mined using steering angle and vehicle speed inputs.
Technician B says that both low and high beams are
controlled by the AFS ECU. Who is correct?
17. AFS low speed swivel range is being discussed. Techni- Both
cian A says that during a right turn the left headlamp
angle is fixed. Technician B says that during a left turn
the left headlamp can swivel up to 15 degrees. Who is
correct?
18. Which of the following is an example of a piezoelectric Knock sensor
sensor? oil pressure gauge sender unit, knock sensor,
coolant temp sender unit, hall-effect sensor
