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 31, Problem 15RQ
True or False? The signals from an air-fuel ratio sensor are identical to those from a conventional oxygen sensor.
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Chapter 31 Solutions
Automotive Technology: A Systems Approach (MindTap Course List)
Ch. 31 - List four service precautions for working on the...Ch. 31 - What is indicated by a LTFT reading of 24 percent?Ch. 31 - What is the correct procedure for checking an...Ch. 31 - What is the difference between STFT and LTFT?Ch. 31 - The PCM checks for a closed throttle plate each...Ch. 31 - Which of the following is a likely cause of a lean...Ch. 31 - What problem may result from dirt buildup on an...Ch. 31 - Which of the following would not cause a...Ch. 31 - What is the correct way to test an injector with...Ch. 31 - What is the difference between the pulse width and...
Ch. 31 - How can you use a dual trace scope to make sure...Ch. 31 - What are three possible problems that can allow...Ch. 31 - What is the purpose of having two accelerator...Ch. 31 - What is indicated by a negative LTFT value?Ch. 31 - True or False? The signals from an air-fuel ratio...Ch. 31 - While discussing the causes of...Ch. 31 - While discussing IAC valve diagnosis: Technician A...Ch. 31 - While discussing IAC motor removal, service, and...Ch. 31 - While discussing injector testing: Technician A...Ch. 31 - While discussing airflow sensors: Technician A...Ch. 31 - While discussing scan tool diagnosis of fuel...Ch. 31 - While discussing a high idle speed problem:...Ch. 31 - While discussing the causes of a rich air-fuel...Ch. 31 - While diagnosing an idle speed problem: Technician...Ch. 31 - While looking at fuel trim values: Technician A...
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- When an engine is running lean, the voltage signal from the oxygen sensor will be (low or high).arrow_forwardWhich of the following is the most likely cause of a lean condition during acceleration and cruising speeds? a. A defective oxygen sensor b. A defective PCM c. A defective ECT sensor d. A defective MAF sensorarrow_forwardWhich of the following is a likely cause of a lean condition during acceleration and cruising speeds? a. A defective oxygen sensor b. A defective PCM c. A defective ECT sensor d. A defective MAF sensorarrow_forward
- Which of the following is the least likely cause of a no-start condition? Faulty CKP sensor Faulty KS Fuel or ignition system faults Faulty PCM wiringarrow_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_forwardWhat is the correct procedure for checking an oxygen sensor with a DMM?arrow_forward
- A typical normal oxygen sensor signal will toggle between and volts.arrow_forwardExplain the working of NDIR and chemical sensors of exhaust gas analyzersarrow_forwardWhich of the following will be used by a contact type sensor ? a. Ultrasonic Sound Wave b. Dial Gauge c. Magnetic field d. Laser Beamarrow_forward
- Q 151. the activity of an O2 sensor is best monitered with a ______ . a. scan tool b. logic probe c. noid light d. lab scopearrow_forwardTrue or False? On some engines, if the gap between the crankshaft sensor and its trigger wheel is outside specifications, the sensor should be replaced.arrow_forwardWhich of the following statements about zirconium oxygen sensors is not true? The normal operating range for an O2S is between 0 and 1 volt. If the sensors voltage toggles between 0 volts and 500 millivolts, it is operating normally. The voltage signal from an upstream O2S should have seven cross counts within 5 seconds with the engine running without a load at 2,500 rpm. Engine control systems monitor the activity of the O2S and store a code when the sensors output is not within the desired range.arrow_forward
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