Exam 47: Advanced Emission and On-Board Diagnostics Obd

The misfire that would MOST-Likely cause the fuel system to revert to open loop because the misfire would result in more O₂ in the exhaust is:

During a(n) ____________________, the engine must enter closed loop and all of the specified trip monitors must operate.

A catalyst damaging code, or type A code, is never emissions related.

A(n) ____________________ monitor is a continuous monitor that looks at electrically controlled emission devices, sensors, and actuators that are not tested by other OBD II monitors.

While having a discussion, Technician A says that the term "continuous" means a monitor check is taking place when requested by the computer when the key is on or the engine is running. Technician B says that description is of a noncontinuous monitor. Who is correct?

When an electronic problem occurs in a circuit that the computer senses or controls, a DTC is stored in the computer's ____________________.

What is meant by the term type A misfire?

What is the difference between diagnostic test modes 7 and 8?

OBD II DTCs have five characters, a letter followed by four numbers. What do the characters represent?

A(n) ____ requires the ignition switch to be off for a period of time.

OBD II provides common standards to be shared among all makes of vehicles. List four of the standards, as prepared by the Society of Automotive Engineers (SAE).

The objective of OBD II is to detect exhaust and evaporative emissions that exceed the Federal Test Procedure (FTP) by 0.5 times.

What are some of the items that you would test when diagnosing a vehicle that has failed an emissions test?

Which of the following is LEAST-Likely a noncontinuous monitor?

All of the following statements about diagnostic test modes are true EXCEPT:

OBD II requires each manufacturer to use the same language between the computer, sensors, actuators, and scan tool.

Which of the following statements is LEAST-Likely true?

The term MOST-Likely used to describe the speed of O₂ sensor oscillations between rich and lean is:

Mode ____ displays vehicle information, including the VIN and verification of correct software installation and assurance that it has not been altered.

While having a discussion, Technician A says that a typical type B misfire monitor would allow about 8%-10% random misfiring before setting a pending code and recording the operating conditions (PIDs) in a freeze frame. Technician B says a type B misfire monitor would only allow about 2%-3% random misfirings. Who is correct?