49.02 onboard diagnostics

Automotive emissions cause harm to all of these EXCEPT:

• the air we breathe.

• the environment.

• modern technology.

• human health.

Federal emissions regulations started when Congress passed the Clean Air Act in:

• 1963.

• 1967.

• 1970.

• 1977.

A vehicle is known to be out of compliance with clean air regulations whenever:

• it flunks a safety inspection.

• its registration has expired.

• a red light is illuminated on the instrument panel.

• its malfunction indicator lamp (MIL) is illuminated.

Which of these pollutants is caused by fuel or oil vapors?

• Volatile organic compounds (VOCs)

• Hydrocarbons (HCs)

• Carbon monoxide (CO)

• Particulate matter (PM)

Harmful tailpipe emissions include all of these EXCEPT:

• carbon monoxide (CO)

• hydrocarbons (HCs)

• particulate matter (PM)

• oxygen (O2)

Which of these has reduced the weight and expense of wire bundles in today's automobiles?

• Aluminum wiring

• Shared circuits

• High-voltage circuits

• Controller area networks

In what year was on-board diagnostics II (OBDII) systems enacted nationwide?

• 1973

• 1981

• 1975

• 1996

The first generation of self-diagnostics used nationwide on U.S. vehicles was called:

• self-diagnostics 1.

• on-board diagnostics I (OBDI).

• exhaust gas recirculation (EGR).

• controller area network (CAN).

The Society of Automotive Engineers (SAE) has helped to standardize automotive terms used by engineers and techs alike by publishing recommended practice document:

• J1194.

• J1930.

• J20 12.

• J2018.

Which of these provides constant yet simplified interconnectivity between on-board vehicle modules?

• Discreet wiring

• A controlled area network bus (CAN-bus)

• A scan tool

• A personal computer (PC)