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ASE A6 ELECTRICAL/ELECTRONIC
SYSTEMS 2026 QUESTIONS AND
ANSWERS| ACE YOUR GRADES.
When checking a vehicle for DTCs, code U1064 is found: Loss of
Communication with BCM. Technician A says that the BCM
should be replaced. Technician B says the cause for the OTC
could be another module in the network.
Who is right?
A. Technician A only
B. Technician B only
C. Both A and B D. Neither A or B - correct answer -B. This code
does not necessarily mean that the module has failed, but rather
that there is a problem preventing communication. A
communications DTC can be caused by a faulty connector or
wiring, an open or short circuit, a voltage problem on the network,
another module in the network, or the module itself.
In the schematic shown above (pg 91), only the console and the
radio are illuminated when the lights are
turned on. Which of these could be the cause?
, Page | 2
A. A blown five amp fuse
B. A faulty connection at C216
C. A loose connection at G1002
D. A faulty connection at C504 - correct answer -C. A blown fuse
or a faulty connection at C216 would prevent all the lights from
working. A poor connection at C504 would prevent the radio light
from working and we know from the question that it works. The
radio is case grounded and the console light also has a separate
ground. However,
all the other lights share the G1002 ground and a poor connection
there could cause an open circuit and keep those lights from
working.
When checking exterior LED fights on a vehicle, all of these can
be checked EXCEPT:
A. condition of filament.
B. continuity
C. power circuit
D. ground circuit - correct answer -A. LED lights have no filament,
so a visual inspection will not determine whether the light is good,
If an LED light assembly
does not illuminate, check the light for an open circuit, inspect the
wiring and make sure there is power to the light, just as you would
for a conventional incandescent light.
, Page | 3
All of the gauges on a vehicle work except the coolant
temperature gauge. A variable resistor is connected between the
sending unit wire and ground. With the Ignition switch ON the
resistance is varied,
making the gauge needle move. Technician A says the instrument
voltage regulator could be the cause.
Technician B says the sending unit could be faulty.
Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B - correct answer -B. If all the gauges were dead,
then the cause would probably be the instrument voltage
regulator. However, only the temperature gauge is inoperative.
The gauge was tested properly in the question so a faulty sending
unit is indicated. The
resistance of the sending unit can be checked by connecting an
ohmmeter between the terminal lead and ground. The resistance
value should change in proportion to the coolant temperature.
Compare results with the manufacturer's specifications.
, Page | 4
All of these types of headlights are found on today's vehicle's
EXCEPT for:
A. conventional sealed beams headlamps.
B. composite sealed beams headlamps.
C. Xenon headlamps.
D. LED headlamps. - correct answer -A. Conventional sealed
beams have all but been replaced by the other types of
headlamps listed in this question
Which of these is most useful for first diagnosing vehicles with
multiplex (networked) electrical systems?
A. A voltmeter
B. An oscilloscope
C. A logic probe
D. A scan tool - correct answer -D. Multiplexed networks can be
monitored and tested using an OEM or equivalent scan tool.
Which of these is best to use for testing networked components
for proper operation when a vehicle is not actually being driven on
the road?
ASE A6 ELECTRICAL/ELECTRONIC
SYSTEMS 2026 QUESTIONS AND
ANSWERS| ACE YOUR GRADES.
When checking a vehicle for DTCs, code U1064 is found: Loss of
Communication with BCM. Technician A says that the BCM
should be replaced. Technician B says the cause for the OTC
could be another module in the network.
Who is right?
A. Technician A only
B. Technician B only
C. Both A and B D. Neither A or B - correct answer -B. This code
does not necessarily mean that the module has failed, but rather
that there is a problem preventing communication. A
communications DTC can be caused by a faulty connector or
wiring, an open or short circuit, a voltage problem on the network,
another module in the network, or the module itself.
In the schematic shown above (pg 91), only the console and the
radio are illuminated when the lights are
turned on. Which of these could be the cause?
, Page | 2
A. A blown five amp fuse
B. A faulty connection at C216
C. A loose connection at G1002
D. A faulty connection at C504 - correct answer -C. A blown fuse
or a faulty connection at C216 would prevent all the lights from
working. A poor connection at C504 would prevent the radio light
from working and we know from the question that it works. The
radio is case grounded and the console light also has a separate
ground. However,
all the other lights share the G1002 ground and a poor connection
there could cause an open circuit and keep those lights from
working.
When checking exterior LED fights on a vehicle, all of these can
be checked EXCEPT:
A. condition of filament.
B. continuity
C. power circuit
D. ground circuit - correct answer -A. LED lights have no filament,
so a visual inspection will not determine whether the light is good,
If an LED light assembly
does not illuminate, check the light for an open circuit, inspect the
wiring and make sure there is power to the light, just as you would
for a conventional incandescent light.
, Page | 3
All of the gauges on a vehicle work except the coolant
temperature gauge. A variable resistor is connected between the
sending unit wire and ground. With the Ignition switch ON the
resistance is varied,
making the gauge needle move. Technician A says the instrument
voltage regulator could be the cause.
Technician B says the sending unit could be faulty.
Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B - correct answer -B. If all the gauges were dead,
then the cause would probably be the instrument voltage
regulator. However, only the temperature gauge is inoperative.
The gauge was tested properly in the question so a faulty sending
unit is indicated. The
resistance of the sending unit can be checked by connecting an
ohmmeter between the terminal lead and ground. The resistance
value should change in proportion to the coolant temperature.
Compare results with the manufacturer's specifications.
, Page | 4
All of these types of headlights are found on today's vehicle's
EXCEPT for:
A. conventional sealed beams headlamps.
B. composite sealed beams headlamps.
C. Xenon headlamps.
D. LED headlamps. - correct answer -A. Conventional sealed
beams have all but been replaced by the other types of
headlamps listed in this question
Which of these is most useful for first diagnosing vehicles with
multiplex (networked) electrical systems?
A. A voltmeter
B. An oscilloscope
C. A logic probe
D. A scan tool - correct answer -D. Multiplexed networks can be
monitored and tested using an OEM or equivalent scan tool.
Which of these is best to use for testing networked components
for proper operation when a vehicle is not actually being driven on
the road?
