Automotive Technology: A Systems Approach (MindTap Course List)
6th Edition
ISBN: 9781133612315
Author: Jack Erjavec, Rob Thompson
Publisher: Cengage Learning
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Chapter 1, Problem 8RQ
To determine
The government-mandated warranty that specifically covered the catalytic converters and engine control module is
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Technician A says that the PCM illuminates the mil if a defective causes emission levels to exceed 2.5 times the emission standards for that model year vehicle. Technician B says that if a misfire condition threatens engine or catalyst damage, the PCM flashes the mil. Who is correct
the goverment mandated warranty that specifically covers the catalytic converter and engine control module is the
What affects the efficiency of a catalytic converter?
exhaust quality
air/fuel ratio
its temperature
fuel quality
Chapter 1 Solutions
Automotive Technology: A Systems Approach (MindTap Course List)
Ch. 1 - Prob. 1RQCh. 1 - Explain the basic requirements for becoming a...Ch. 1 - List at least five different types of businesses...Ch. 1 - Name the different ways that you can gain work...Ch. 1 - Explain the implied difference between someone who...Ch. 1 - Individuals often begin a career as an automotive...Ch. 1 - Prob. 7RQCh. 1 - Prob. 8RQCh. 1 - Which of the following is typically included in a...Ch. 1 - Prob. 10RQ
Ch. 1 - Repair work performed on vehicles still under tire...Ch. 1 - Prob. 12RQCh. 1 - Normally, whose job is it to greet the customer...Ch. 1 - Technician A says that all an individual needs to...Ch. 1 - To be successful, todays automotive technician...Ch. 1 - A technician must have a minimum of year(s) of...Ch. 1 - An experienced technician who passes all eight...Ch. 1 - Technician A says battery warranties are often...Ch. 1 - Prob. 19RQCh. 1 - Ongoing technical training and support is...
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While discussing the catalyst efficiency monitor: Technician A says that if the catalytic converter is not reducing emissions properly, the voltage frequency increases on the downstream HO2S. Technician B says that if a fault occurs in the catalyst monitor system on three drive cycles, the MIL will be illuminated. Who is correct? Technician A Technician B Both A and B Neither A nor B
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The fuel monitor checks fuel trim and fuel trim.
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While discussing OBD II systems: Technician A says that the PCM illuminates the MIL if a defect causes emission levels to exceed 2.5 times the emission standards for that model year vehicle. Technician B says that if a misfire condition threatens engine or catalyst damage, the PCM flashes the MIL. Who is correct? Technician A Technician B Both A and B Neither A nor B
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A system may fail the catalyst monitor test for all of these reasons, except. defective upstream or downstream oxygen sensor circuits a leaking exhaust fuel contaminants ignition system faults
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True or False? Engine misfires can cause a catalytic converter to overheat.
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Technician A says that vacuum hose routing for the entire vehicle is illustrated on the underhood decal. Technician B says that this decal illustrates emission system vacuum hose routing. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B
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The catalyst monitor test may fail for all of these reasons, except ________.a. defective upstream or downstream oxygen sensor circuitsb. a leaking exhaustc. fuel contaminantsd. ignition system misfire
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Which of the following statements about fuel trim is not true? a. A positive fuel trim value means that the PCM detects a lean mixture and is decreasing the pulse width to add more fuel to the mixture. b. Short-term fuel trim represents changes made immediately in response to HO2S signals. c. Long-term fuel trim represents changes made to set a new base pulse width. d. Long-term fuel trim responds to the trends of the short-term fuel trim.
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Describe how a selective catalytic reduction system works.
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When should the ATF level be checked on most vehicles? a. When the engine is cool b. When the engine is at operating temperature and the engine is off c. When the engine is at operating temperature and the engine is on d. It does not matter
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Technician A says that the catalytic converter is used only to quiet the noise of the exhaust. Technician B says that the catalytic converter is used to alter the contents of the engines exhaust. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B
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Describe carbon monoxide (CO) emissions in relation to air-fuel ratio.
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