AUT108 Week 7 Quiz OBD Systems

Tech A says that a "P" in the DTC stands for a powertrain code. Tech B says a "U" stands for an undetermined code. Who is correct?

Select one:

• Tech A

• Tech B

• Both A and B

• Neither A nor B

In what year did it become mandatory for all vehicles to be on-board diagnostic II (OBDII) compliant?

Select one:

• 1994

• 1995

• 1996

• 1997

When a vehicle's malfunction indicator lamp (MIL), formerly called a "check engine light," is illuminated, it means the vehicle is not complying with clean air regulations.

Select one:

• True

• False

If the MIL flashes, it indicates that the:

Select one:

• engine needs to be serviced within the next 100 miles.

• driver should stop the vehicle as soon as safely possible.

• vehicle needs refueling.

• PCM is malfunctioning.

Tech A says that monitors are designed to test if emission systems are working properly. Tech B says that monitors are designed to store sensor data about a fault if a DTC is set. Who is correct?

Select one:

• Tech A

• Tech B

• Both A and B

• Neither A nor B

When misfires occur, the full volume of air and fuel from the misfiring cylinder is burned in the __________.

Select one:

• EGR system

• Exhaust

• Catalyst

• Secondary air system

______ monitors the system for leaks as well as the ability to purge the canister of vapors.

Select one:

• Catalytic converter monitor

• Heated catalyst monitor

• Evaporative system monitor

• Secondary air system monitor

Which operating mode of the OBD II system shows current data?

Select one:

• $1

• $2

• $3

• $4

Tech A states that simple scan tools from the 1980's could read and erase fault codes. Tech B states that modern scan tools can display sensor data in a graphical format. Who is correct?

Select one:

• Tech A

• Tech B

• Both A and B

• Neither A nor B

The OBDII system constantly tests and analyzes each system's performance through a set of PCM programs called ________.

Select one:

• Monitors

• Sensors

• Gauges

• None of the above