Chapter 25 Computer System Service 423
Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
5. Technician A says a passive automotive
sensor is capable of generating its own
voltage. Technician B says a passive
automotive sensor is not capable of
generating its own voltage. Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
6. A late model, almost new vehicle is suffering
from poor fuel economy. Technician A says
to check for a factory software update.
Technician B says to replace all the fuel
injectors. Who is correct?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
7. Technician A says a reference voltage of
about 12 volts is normally required for an
automotive variable resistance type sensor
to operate properly. Technician B says a
reference voltage of about 5 volts is normally
required for an automotive variable
resistance type sensor to operate properly.
Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
8. A trouble code shows a problem with an
active sensor. Technician A says the voltage
produced by an active sensor is very low,
often under 1 volt. This makes sensor output
and wiring harness continuity very critical.
Technician B says that active sensor signals
are just as strong as passive sensor signals.
Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
10. The computer must be removed from a
late-model vehicle. Technician A says to
keep one hand on chassis ground when
handling the computer. Technician B says
to wear an anti-static wrist strap when
handling the computer. Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
ASE-Type Questions ASE-Type Questions
1. Technician A says automotive computer
system trouble codes are used to detect faulty
components in the system. Technician B
says automotive computer system trouble
codes are used to indicate the general area of
trouble in a computer system. Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
2. A trouble code is triggered in an automotive
computer system. Technician A says fuel-
contaminated engine oil could possibly
trigger this trouble code. Technician B says
fuel-contaminated engine oil has no effect on
computer system operation. Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
3. Technician A says a basic circuit problem
is caused by something in the circuit that
increases or decreases current. Technician B
says a basic circuit problem is caused by
something in the circuit that increases or
decreases resistance. Who is right?
(A) A only.
(B) B only.
(C) Both A and B.
(D) Neither A nor B.
4. A scan tool indicates a problem with the
MAP sensor. Technician A says you should
check the operating condition of the MAP
sensor. Technician B says you should check
for poor electrical connections in the system.