Deck 1: The Diagnostic Process

Question 1

A generic (global)-type scan tool can retrieve ________ data.

A) ABS brake system
B) HVAC
C) emissions-related
D) All of the above

Answer 1

C

Question 2

The steps in a manufacturer-specific diagnostic routine are being discussed. Technician A says that after recording any DTCs, the codes should be erased. Technician B says to road test the vehicle twice to turn off the MIL. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Answer 2

C

Question 3

What fault could occur that can cause a driveability issue and not set a diagnostic trouble code (DTC)?

A) Contaminated fuel that has water or diesel fuel mixed with the fuel
B) Clogged air intake systems due to an animal nest of road debris caught in the air intake system
C) Alcohol (ethanol) in high concentrations in the fuel
D) Any of the above

Answer 3

D

Question 4

A drive cycle is designed to reset all the OBD-II monitors. Before starting the drive cycle the engine should be ________.

A) cold (ECT = IAT)
B) operated at idle for two minutes
C) fully warmed up (cooling fans cycles on and off two times)
D) have a full fuel tank

Question 5

How many steps does the book outline for a systematic diagnostic procedure?

A) Five
B) Four
C) Eight
D) Six

Question 6

What is the first step of the diagnosis process?

A) Check for technical service bulletins
B) Look at scan tool data
C) Verify the problem
D) Retrieve the diagnostic trouble codes

Question 7

All these actions involve verifying the problem EXCEPT ________.

A) look for TSBs
B) check the MIL
C) determine the temperature the when problem occurred
D) look for aftermarket parts

Question 8

Technician A says that it is a good idea to perform a test drive before attempting repairs. Technician B says that its a good idea to let the customer accompany the technician on the test drive. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Question 9

Technician A assumes a replacement part is good just because it is new. Technician B says that sometimes recent repair work will be the cause of a complaint. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Question 10

Which diagnostic step is the most important aspect of diagnosis?

A) Retrieve the trouble codes
B) Verify the problem
C) Check the service bulletins
D) Visual inspection

Question 11

Technician A says that when checking engine oil, it is normal for the oil to catch fire if lit by a match. Technician B says that oil on the dipstick that catches fire when lit is a sign of fuel in the oil. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Question 12

Technician A says to check coolant level in the radiator when it is hot. Technician B says to check coolant level in the radiator when it is cool. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Question 13

Technician A says that water floats to the top of fuel in the tank. Technician B says that water is more likely to be drawn into the system when the fuel level is low. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Question 14

Technician A says that low battery voltage can cause driveability problems. Technician B says that the charging voltage should be over 15 volts when the engine is idling. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Question 15

Technician A says that a standard spark plug can be used to check proper ignition system voltage. Technician B says that the energy required to jump the gap of a spark tester is around 3000 volts. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Question 16

Technician A says that a vehicle may have stored DTCs even if the MIL is not illuminated. Technician B says that all DTCs will illuminate the MIL. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Question 17

Technician A says that most TSBs involve a specific stored DTC. Technician B says that the ECT and IAT reading should be close to the same temperature after the vehicle sits for several hours. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Question 18

Technician A says that a power balance test is the best way to isolate the problem cylinder. Technician B says that a compression and cylinder leakage test can help determine the cause of the problem. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Question 19

Technician A says that a symptom may be corrected without correcting the cause of the problem. Technician B says that verifying the repair will determine if the root cause of the problem has been repaired. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Question 20

When should DTCs be cleared?

A) After consulting TSBs
B) After the problem has been verified
C) After pinpointing a problem cylinder
D) After the repair has been verified

Question 21

Which of the following should be checked before returning the vehicle to the customer?

A) The radio presets and clock have been restored
B) The radio is turned off
C) The vehicle is clean
D) All of these are correct

Question 22

Technician A uses a scan tool to clear stored DTCs. Technician B says that clearing DTCs will also clear all of the noncontinuous OBD-II monitors. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Question 23

Technician A says that generic scan tools must be able to read all generic OBD-II codes. Technician B says that all generic scan tools must be able to read manufacturer OBD-II trouble codes. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Question 24

Technician A says that non-emission related codes that make the MIL illuminate are called "Type A" codes. Technician B says that emission related codes that illuminate the MIL after the first fault are called "Type A" codes. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Question 25

A type ________ DTC is set if an emission problem may cause damage to the catalytic converter.

A) A
B) B
C) C
D) D

Question 26

Type ________ DTCs are set by non-emission related diagnostic tests.

A) A or B
B) C and D
C) A and C
D) B and C

Question 27

A freeze frame is stored when a type ________ DTC is set.

A) A or C
B) A or B
C) B or C
D) C or D

Question 28

Which of these is the LEAST desired method for clearing DTCs?

A) Battery disconnect
B) Overcharge the battery
C) Driving the vehicle
D) Use a scan tool