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Exam 3: History of On-Board Diagnostics Obd

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Question 21

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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.

A) True
B) False

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Question 22

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

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A universal OBD II 16-pin DLC ...

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Question 23

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

What is Mode 2 is referred to as?

The two main categories of OBD II monitors are the:

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

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

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

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

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.

List the three objectives of OBD II?

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

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

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

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

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.

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?

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

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?

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