Texas Emissions Inspections Exam
Why are we concerned about motor vehicle pollution? - answer Motor vehicles emit
toxic air pollutants
Motor vehicles contribute to the formation of ground level ozone
A "typical" vehicle emits a half-ton of air pollution annually
A malfunctioning vehicle emits many times the amount of pollution of a "typical" vehicle
True or False: Motor vehicles are the largest source of ground-level ozone (or smog) in
Texas. - answer True
What is the primary purpose of OBDII? - answer To insure that vehicles emit the
minimum amount of pollutants through their useful life.
What does the OBD II inspection do? - answer Monitors all components that affect
vehicle emissions.
Detect and record malfunctions of the components that affect vehicle emissions.
Checks the results of the self-tests that occur while the vehicle is driven prior to the time
of inspection.
What model year and weight requirement are OBDII systems required in gasoline
powered vehicles? - answer1996 or newer/8,500 pounds or less
True or False: Each vehicle make requires a different Diagnostic Link Connector, and
you are responsible for ensuring your inspection station has each tool needed for all
vehicle makes. - answerFalse
Where can you locate the diagnostic connector in most vehicles? - answerBeneath the
instrument panel, near the steering column
What is the name of the amber colored warning light that is illuminated by the OBD
system when a malfunction occurs? - answerMalfunction Indicator Light
When severe misfire occurs that could damage the catalytic converter, what does the
MIL do? - answerFlashes on and off once per second
What two checks are required of the MIL:
i. Key-On Engine Off (KOEO)
ii. Key-On Engine Running (KOER)
iii. Key-Off Engine Off (KOEO)
iv. Key-Off Engine Off (KOEO) - answeri and ii
Why are we concerned about motor vehicle pollution? - answer Motor vehicles emit
toxic air pollutants
Motor vehicles contribute to the formation of ground level ozone
A "typical" vehicle emits a half-ton of air pollution annually
A malfunctioning vehicle emits many times the amount of pollution of a "typical" vehicle
True or False: Motor vehicles are the largest source of ground-level ozone (or smog) in
Texas. - answer True
What is the primary purpose of OBDII? - answer To insure that vehicles emit the
minimum amount of pollutants through their useful life.
What does the OBD II inspection do? - answer Monitors all components that affect
vehicle emissions.
Detect and record malfunctions of the components that affect vehicle emissions.
Checks the results of the self-tests that occur while the vehicle is driven prior to the time
of inspection.
What model year and weight requirement are OBDII systems required in gasoline
powered vehicles? - answer1996 or newer/8,500 pounds or less
True or False: Each vehicle make requires a different Diagnostic Link Connector, and
you are responsible for ensuring your inspection station has each tool needed for all
vehicle makes. - answerFalse
Where can you locate the diagnostic connector in most vehicles? - answerBeneath the
instrument panel, near the steering column
What is the name of the amber colored warning light that is illuminated by the OBD
system when a malfunction occurs? - answerMalfunction Indicator Light
When severe misfire occurs that could damage the catalytic converter, what does the
MIL do? - answerFlashes on and off once per second
What two checks are required of the MIL:
i. Key-On Engine Off (KOEO)
ii. Key-On Engine Running (KOER)
iii. Key-Off Engine Off (KOEO)
iv. Key-Off Engine Off (KOEO) - answeri and ii
