Exam 3: History of On-Board Diagnostics Obd

The two main categories of OBD II monitors are the:

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.

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

What is Mode 2 is referred to as?

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

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

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.

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

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 SAE standard determines where automotive manufacturers can place the DLC?

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

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

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?

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

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

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

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

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

List the three objectives of OBD II?

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.