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 24, Problem 6ASRQ
To determine
While discussing the MIL on OBD II systems: the technician with correct approach.
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While discussing the MIL on OBD II systems:
Technician A says that the MIL will flash if the
PCM detects a fault that would damage the
catalytic converter. Technician B says that
whenever the PCM has detected a fault, it will
turn on the MIL. Who is correct?
a. Technician A
• Technician B
• Both A and B
• Neither A nor B
Which of the following statements is not true?
a. DTCs that will not affect emissions will never illuminate the MIL.
b. An active or current DTC represents a fault that was detected and occurred during two trips.
c. When a two-trip fault is detected for the second time, a DTC is stored as a pending code.
d. There are some DTCs that will set in one trip
A customer comes in with an indirect TPMS, complaining that despite all the tires running low on pressure, the TPMS light never came on. Technician A says it’s likely due to a faulty module. Technician B says it may just be normal operation of an indirect TPMS. Who is correct?
Technician A
Technician B
Both Technician A and B
Neither Technician A or B
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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- 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 Barrow_forwardWhile 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 Barrow_forwardWhile discussing evaporative (EVAP) systems: Technician A says that the coolant temperature has to be above a preset value before the PCM will operate the canister purge solenoid. Technician B says that the vehicle speed has to be above a preset value before the PCM will operate the canister purge solenoid. Who is correct? a. Technician A only b. Technician B only c. Both A and B d. Neither A nor Barrow_forward
- Technician A says that some antitheft systems sound an alarm if someone enters the vehicle without a key Technician B says that some antitheft devices prevent the engine from starting. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardWhile discussing what is indicated by a vehicle’s charge indicator: Technician A says that any positive reading on an ammeter shows that the generator is in working condition. Technician B says that if the voltmeter reading does not increase immediately after starting the engine, the battery is bad. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardWhile checking for conditions that might cause coolant electrolysis: Technician A places the positive lead of a voltmeter into the coolant and connects the negative lead to a ground. Technician B checks for the presence of voltage in the coolant with the ignition off. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forward
- While checking the condition of a cars ATF: Technician A says that if the fluid has a dark brownish or blackish color and/or a burned odor, the fluid has been overheated. Technician B says that if the fluid has a milky color, this indicates that engine coolant has been leaking into the transrnissions cooler. Who is correct? a. Technician A only b. Technician B only c. Both A and B d. Neither A nor Barrow_forwardWhile discussing SCR systems: Technician A says that they are used in place of a conventional catalytic converter to reduce NOx, CO, and HC. Technician B says that the most common reductant used is SCR systems is an ammonia-like substance called urea. Who is correct? a. Technician A only b. Technician B only c. Both A and B d. Neither A nor Barrow_forwardTechnician A says that the suspension switch must be turned off before raising any corner of a car with an electronic air suspension. Technician B says that the ignition switch must not be turned on while any corner of a car with electronic air suspension is raised. Who is correct? a. Technician A only b. Technician B only c. Both A and B d. Neither A nor Barrow_forward
- While discussing working on hybrid vehicles: Technician A says to make sure that the high- voltage system is shut down and isolated from the vehicle before working near or with any high-voltage component. Technician B says that when working on or near the high-voltage system , even when it is de - powered , always use insulated tools. Who is correct ?arrow_forwardWhen testing an engine temperature sensor: Technician A uses an ohmmeter to test the thermistor. Technician B says that the thermistor reacts to pressure and applies air pressure to the backside of the sensor. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardWhile checking the condition of a vehicles ATF: Technician A says that if the fluid has a burnt color or odor, the fluid has been overheated. Technician B says that a milky color indicates that engine coolant has been leaking into the transmissions cooler in the radiator. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forward
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