ASE A8 EXAM 4 QUESTIONS WITH 100%
CORRECT ANSWERS.
1 of 50
Definition
Technician A says diagnostic trouble codes should be erased using a scan
tool. Technician B says the monitor for the related fault should be run
before the vehicle is returned to the customer. Who is
correct?
A only
B only
Both A and B
Neither A nor B
,Give this one a try later!
C. (A fuel pressure test is performed to test the ability of the fuel pump to
produce the correct pressure needed to operate the vehicle.
A fuel pump can have good pressure and still not have enough flow or volume. A
restricted fuel filter is usually the cause of this problem.)
C.
B.
A.
Don't know?
2 of 50
Definition
Technician A says to use a scan tool to verify throttle position
sensor input and related DTCs (diagnostic trouble codes).
Technician B says coolant-temperature sensor input is used to help
determine open- and closed-loop status. Who is correct?
A. A only
B.B only
C. Both A and B
D.Neither A nor B
Give this one a try later!
, D.
C. (Both Technicians are correct. Most diaphragm-type EGR valves can be
tested for proper movement by applying vacuum to the valve at idle and
watching for a drop in engine idle. A scan tool also can be used to open the
EGR valve for
testing purposes if the vehicle is equipped with electronic EGR valves.)
C.
B.
Don't know?
3 of 50
Definition
All of the following are true when testing a pickup coil EXCEPT:
A. Resistance value should fall within manufacturer's specifications.
B.Pickup coils should produce an AC voltage signal.
C. If adjustable, then the gap should be checked with a steel feeler
gauge.
D.An erratic ohmmeter reading while wiggling the pickup coil wires
indicates that the pickup coil has an intermittent open.
Give this one a try later!
, C. (The misfire monitor reads the crankshaft signal to determine a miss.
A cylinder that is missing will cause the engine to slow down when that cylinder
is supposed to fire. A worn cam lobe will not cause the engine to slow
down.)
C. (Some pickup coils are adjustable and should be adjusted using a brass
feeler gauge. The magnet in the pickup coil will simulate a drag against
the steel feeler gauge, giving a false reading.)
C. (Both Technicians are correct. An undercharged system would not keep the
battery at a full state of charge, but should generate a diagnostic trouble code
for over or undercharging.)
B. (A strong sulfur smell from the exhaust is a symptom of a rich mixture.
Low fuel pressure would cause a lean mixture.)
Don't know?
4 of 50
Definition
Technician A says a fuel-pressure test is performed to test fuel pump
operation. Technician B says it is possible to have a good fuel
pressure reading and insufficient fuel flow. Who is correct?
A. A only
B.B only
C. Both A and B
D.Neither A nor B
Give this one a try later!
CORRECT ANSWERS.
1 of 50
Definition
Technician A says diagnostic trouble codes should be erased using a scan
tool. Technician B says the monitor for the related fault should be run
before the vehicle is returned to the customer. Who is
correct?
A only
B only
Both A and B
Neither A nor B
,Give this one a try later!
C. (A fuel pressure test is performed to test the ability of the fuel pump to
produce the correct pressure needed to operate the vehicle.
A fuel pump can have good pressure and still not have enough flow or volume. A
restricted fuel filter is usually the cause of this problem.)
C.
B.
A.
Don't know?
2 of 50
Definition
Technician A says to use a scan tool to verify throttle position
sensor input and related DTCs (diagnostic trouble codes).
Technician B says coolant-temperature sensor input is used to help
determine open- and closed-loop status. Who is correct?
A. A only
B.B only
C. Both A and B
D.Neither A nor B
Give this one a try later!
, D.
C. (Both Technicians are correct. Most diaphragm-type EGR valves can be
tested for proper movement by applying vacuum to the valve at idle and
watching for a drop in engine idle. A scan tool also can be used to open the
EGR valve for
testing purposes if the vehicle is equipped with electronic EGR valves.)
C.
B.
Don't know?
3 of 50
Definition
All of the following are true when testing a pickup coil EXCEPT:
A. Resistance value should fall within manufacturer's specifications.
B.Pickup coils should produce an AC voltage signal.
C. If adjustable, then the gap should be checked with a steel feeler
gauge.
D.An erratic ohmmeter reading while wiggling the pickup coil wires
indicates that the pickup coil has an intermittent open.
Give this one a try later!
, C. (The misfire monitor reads the crankshaft signal to determine a miss.
A cylinder that is missing will cause the engine to slow down when that cylinder
is supposed to fire. A worn cam lobe will not cause the engine to slow
down.)
C. (Some pickup coils are adjustable and should be adjusted using a brass
feeler gauge. The magnet in the pickup coil will simulate a drag against
the steel feeler gauge, giving a false reading.)
C. (Both Technicians are correct. An undercharged system would not keep the
battery at a full state of charge, but should generate a diagnostic trouble code
for over or undercharging.)
B. (A strong sulfur smell from the exhaust is a symptom of a rich mixture.
Low fuel pressure would cause a lean mixture.)
Don't know?
4 of 50
Definition
Technician A says a fuel-pressure test is performed to test fuel pump
operation. Technician B says it is possible to have a good fuel
pressure reading and insufficient fuel flow. Who is correct?
A. A only
B.B only
C. Both A and B
D.Neither A nor B
Give this one a try later!
