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What is an OBD II warm-up cycle, and how is it defined?

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An OBD II warm-up cycle is def...

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What is the objective of the on-board diagnostic (OBD) alert system (MIL)?

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The objective of the on-board ...

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What does Mode 7 allow a scan tool to request?

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Mode 7 allows a scan tool to r...

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When a DTC is set, the PCM also stores the operating parameters of the emission control system at the time of the event in a data program called:


A) freeze frame
B) system readiness monitor
C) diagnostic trouble code
D) none of the above

E) B) and C)
F) A) and C)

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How and why could a vehicle fail an OBD test but pass a tailpipe emissions test?

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With OBD II systems, it is possible for ...

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Of what type of emission malfunction does the on-board diagnostics emission monitoring system (OBD II system) alert the driver?

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The system functions as an on-board diagnostics emissions monitoring system that alerts the driver if a malfunction is detected by the powertrain control module (PCM) that causes the emission levels of the vehicle to exceed 1.5 times (50 percent above) the emission standards for the vehicle.

Under the OBD II regulations, what did all vehicle manufacturers have to do for all components and systems related to the engine management and emission control systems?

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Under the OBD II regulations, ...

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The SAE set forth what method to identify DTCs in an OBD II system?

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The method used to identify a ...

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OBD II provides a universal OBD 16-pin DLC for all vehicles manufactured for the U.S. market since 1996.

A) True
B) False

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On an OBD II vehicle, the MIL will turn on when:


A) a condition that could cause emissions levels exceeding 1.5 times the FTP level is detected
B) an input sensor is defective
C) an output sensor is defective
D) all of the above

E) None of the above
F) A) and D)

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OBD II regulations require vehicle manufacturers to use the same terms for the same type of components on all manufacturers' vehicles.

A) True
B) False

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Technician A says that the DLC may be located under the hood on an OBD II vehicle. Technician B says that the DLC may be located anywhere that the manufacturer chooses on an OBD II vehicle. Who is correct?


A) A only
B) B only
C) both A and B
D) neither A nor B

E) C) and D)
F) All of the above

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Emission controls on modern vehicles produced in the United States are installed to:


A) meet federal and state government regulations
B) meet consumer demand
C) meet international standards
D) improve fuel economy

E) None of the above
F) A) and B)

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Can the emission control system be modified by the vehicle's owner or by a repair facility?

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It is a federal offense for ve...

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Technician A says that all P1XXX DTCs are for manufacturers' specific diagnostic trouble codes. Technician B says that all P0XXX DTCs are for generic diagnostic trouble codes. Who is correct?


A) A only
B) B only
C) both A and B
D) neither A nor B

E) None of the above
F) A) and B)

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ODB II DLC has dedicated pin assignments and location based on SAE standard J1962.

A) True
B) False

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OBD II provides a universal OBD 16-pin DLC for all manufacturers' vehicles since 1990.

A) True
B) False

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False

How many OBD II warm-up cycles must occur for a stored DTC to be erased successfully?

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A stored DTC will be...

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OBD II was mandated by the Federal Environmental Protection Agency to be installed on all passenger vehicles beginning with what model year?


A) 1990
B) 1996
C) 2000
D) 2002

E) B) and D)
F) All of the above

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What conditions must be present for an OBD II system to illuminate the malfunction indicator light for a component problem?

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The MIL will only be illuminated when the component has malfunctioned or is clearly performing outside design parameters or if emission levels will exceed 1.5 times the FTP levels.

Showing 1 - 20 of 41

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