Deck 3: History of On-Board Diagnostics Obd

Question 1

Technician A says that the DLC may be located under the hood on an OBD II vehicle. Technician B says that the DLC may be located anywhere that the manufacturer chooses on an OBD II vehicle. Who is correct?

A) A only
B) B only
C) both A and B
D) neither A nor B

Answer 1

D

Question 2

When a DTC is set, the PCM also stores the operating parameters of the emission control system at the time of the event in a data program called:

A) freeze frame
B) system readiness monitor
C) diagnostic trouble code
D) none of the above

Answer 2

A

Question 3

The two main categories of OBD II monitors are the:

A) KOEO and KOER
B) continuous and non-continuous
C) emissions and non-emissions
D) related and non-related

Answer 3

B

Question 4

OBD II provides a universal OBD 16-pin DLC for all manufacturers' vehicles since 1990.

Question 5

Technician A says not all manufacturers provide freeze frame data.Technician B says one of the mandated features of OBD II is the inclusion of freeze frame data. Who is correct?

A) A only
B) B only
C) both A and B
D) neither A nor B

Question 6

OBD II regulations require vehicle manufacturers to use the same terms for the same type of components on all manufacturers' vehicles.

Question 7

Emission controls on modern vehicles produced in the United States are installed to:

A) meet federal and state government regulations
B) meet consumer demand
C) meet international standards
D) improve fuel economy

Question 8

OBD II was mandated by the Federal Environmental Protection Agency to be installed on all passenger vehicles beginning with what model year?

A) 1990
B) 1996
C) 2000
D) 2002

Question 9

OBD II systems have been developed to utilize a common set of diagnostic test modes that are accessible with a generic diagnostic scan tool.

Question 10

OBD II provides a universal OBD 16-pin DLC for all vehicles manufactured for the U.S. market since 1996.

Question 11

On an OBD II vehicle, when the ignition key is on and the engine is not running, the MIL should:

A) be off
B) be illuminated
C) flash and then go out
D) be flashing

Question 12

A drive cycle refers to a trip in which the operating parameters required for the PCM to run OBD II emissions-related monitors have been met.

Question 13

OBD II systems are highly efficient and only illuminate the malfunction indicator light when an emissions failure has occurred that will raise emission levels above 1.5 times the FTP levels.

Question 14

OBD II does not require the inclusion of freeze frame data.

Question 15

Technician A says that all P1XXX DTCs are for manufacturers' specific diagnostic trouble codes. Technician B says that all P0XXX DTCs are for generic diagnostic trouble codes. Who is correct?

A) A only
B) B only
C) both A and B
D) neither A nor B

Question 16

On an OBD II vehicle, the MIL will turn on when:

A) a condition that could cause emissions levels exceeding 1.5 times the FTP level is detected
B) an input sensor is defective
C) an output sensor is defective
D) all of the above

Question 17

A generic OBD II diagnostic scan tool cannot access DTCs on all OBD II vehicles.

Question 18

Technician A says that the DLC on an OBD II vehicle has 18 pins. Technician B says that the pin assignment for the DLC on an OBD II vehicle has not changed since 1996. Who is correct?

A) A only
B) B only
C) both A and B
D) neither A nor B

Question 19

OBD II systems are highly efficient and only illuminate the malfunction indicator light (MIL) when an emissions failure has occurred that will raise emission levels 50 percent above the FTP levels.

Question 20

ODB II DLC has dedicated pin assignments and location based on SAE standard J1962.

Question 21

List the three objectives of OBD II?

Question 22

Under the OBD II regulations, what did all vehicle manufacturers have to do for all components and systems related to the engine management and emission control systems?

Question 23

What did the Clean Air Act (CAA) of 1990 require vehicles sold in the United States to be equipped with?

Question 24

What does Mode 7 allow a scan tool to request?

Question 25

What were two of the major shortfalls of the first-generation OBD systems?

Question 26

On an OBD II scan tool, what is Mode 6, and what does it display?

Question 27

What is Mode 2 is referred to as?

Question 28

What is the relationship between an OBD II drive cycle and an OBD II trip?

Question 29

The SAE set forth what method to identify DTCs in an OBD II system?

Question 30

What conditions must be present for an OBD II system to illuminate the malfunction indicator light for a component problem?

Question 31

What is the Federal Test Procedure (FTP) and what is it intended to simulate?

Question 32

What SAE standard determines where automotive manufacturers can place the DLC?

Question 33

What conditions are required in order for the MIL be turned off on an OBD II vehicle?

Question 34

How many OBD II warm-up cycles must occur for a stored DTC to be erased successfully?

Question 35

What are some of the features of the universal OBD II DLC incorporated into all manufacturers' cars and light trucks?

Question 36

What is the objective of the on-board diagnostic (OBD) alert system (MIL)?

Question 37

Can the emission control system be modified by the vehicle's owner or by a repair facility?

Question 38

How and why could a vehicle fail an OBD test but pass a tailpipe emissions test?

Question 39

Of what type of emission malfunction does the on-board diagnostics emission monitoring system (OBD II system) alert the driver?

Question 40

The Clean Air Act of 1990 required that vehicles sold in the United States be equipped with what feature?

Question 41

What is an OBD II warm-up cycle, and how is it defined?