Automotive Technology: A Systems Approach (MindTap Course List)
6th Edition
ISBN: 9781133612315
Author: Jack Erjavec, Rob Thompson
Publisher: Cengage Learning
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Textbook Question
Chapter 24, Problem 11RQ
The fuel monitor checks fuel trim and fuel trim.
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Chapter 24 Solutions
Automotive Technology: A Systems Approach (MindTap Course List)
Ch. 24 - Describe the difference between an open- and a...Ch. 24 - Explain the use and importance of system strategy...Ch. 24 - Describe an OBD II warm-up cycle.Ch. 24 - Explain the trip and drive cycle in an OBD II...Ch. 24 - Describe how engine misfire is detected in an OBD...Ch. 24 - Describe the purpose of having both upstream and...Ch. 24 - Briefly describe the monitors in an OBD II system.Ch. 24 - Type B engine misfires are excessive if the...Ch. 24 - The monitor system checks the action of the can...Ch. 24 - The monitor system has a(n) and test to check the...
Ch. 24 - The fuel monitor checks fuel trim and fuel trim.Ch. 24 - Which sensor is used for misfire monitoring on OBD...Ch. 24 - Which of the following statements is not true?...Ch. 24 - A computer is capable of doing all of the...Ch. 24 - Which of the following memory circuits is used to...Ch. 24 - Technician A says that the oxygen sensor provides...Ch. 24 - While discussing OBD II systems: Technician A says...Ch. 24 - While discussing the catalyst efficiency monitor:...Ch. 24 - While discussing monitoring systems: Technician A...Ch. 24 - While discussing the comprehensive monitoring...Ch. 24 - Prob. 6ASRQCh. 24 - While discussing diagnostic procedures: Technician...Ch. 24 - Technician A says that the enable criteria are the...Ch. 24 - While discussing PCM monitor tests: Technician A...Ch. 24 - While discussing the misfire monitor: Technician A...
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- When checking the exhaust system, the Certified Inspector must reject the vehicle if: It does not have a heat shield. It does not have a muffler. It does not have a turbocharger. It does not have either a muffler or a turbocharger.arrow_forwardTrue or False? Engine misfires can cause a catalytic converter to overheat.arrow_forwardList at least five safety precautions that shouldbe adhered to when working with fuel systems.arrow_forward
- 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.arrow_forwardDescribe how testing GDI fuel systems differs from non-GDI systems.arrow_forwardA rich air-fuel ratio causes HC emissions to ________.arrow_forward
- 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 matterarrow_forwardDescribe carbon monoxide (CO) emissions in relation to air-fuel ratio.arrow_forwardWhich of the following conditions can be revealed by fuel pressure readings? Faulty fuel pump Faulty fuel pressure regulator Restricted fuel delivery system All of the abovearrow_forward
- What are two ways to provide input for the speedometer?arrow_forwardExplain how the computer controls the air-fuel ratio on an EFI system.arrow_forwardWhich 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.arrow_forward
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