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 25, Problem 5ASRQ
While discussing TP sensor diagnosis: Technician A says that a four-wire TP sensor contains an idle switch. Technician B says that in some applications, the TP sensor mounting bolts may be loosened and the TP sensor housing rotated to adjust the voltage signal with the throttle in the idle position. Who is correct?
- Technician A
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Chapter 25 Solutions
Automotive Technology: A Systems Approach (MindTap Course List)
Ch. 25 - OBD II systems use several modes of operation....Ch. 25 - List the four ways that individual components can...Ch. 25 - True or False? A bad ground can cause an increase...Ch. 25 - True or False? An A/F ratio sensor can be tested...Ch. 25 - A typical normal oxygen sensor signal will toggle...Ch. 25 - Prob. 6RQCh. 25 - When an engine is running lean, the voltage signal...Ch. 25 - List six steps involved in performing a visual...Ch. 25 - Many control systems have operating modes that can...Ch. 25 - Which of the following statements about zirconium...
Ch. 25 - Describe the typical procedure for adjusting a TP...Ch. 25 - Why does the rotor for a CKP have one or more...Ch. 25 - A system may fail the catalyst monitor test for...Ch. 25 - A defective LAT sensor or circuit may cause the...Ch. 25 - Which of the following is the least likely cause...Ch. 25 - Technician A says that an oxygen sensor can be a...Ch. 25 - Prob. 2ASRQCh. 25 - While discussing ECT sensor diagnosis: Technician...Ch. 25 - While discussing Hall-effect vehicle speed sensor...Ch. 25 - While discussing TP sensor diagnosis: Technician A...Ch. 25 - While diagnosing the cause of a hard starting...Ch. 25 - While discussing testing OBD II system components:...Ch. 25 - When testing a frequency varying MAF: Technician A...Ch. 25 - Technician A says that a faulty MAF sensor can...Ch. 25 - While discussing the MIL on OBD 11 systems:...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- When 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_forwardTechnician A says that based on current conditions, a reference voltage sensor modifies a fixed voltage from the computer and sends that voltage back to the computer. Technician B says that most reference voltage sensors are variable resistors or potentiometers. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardTechnician A says that a faulty TP sensor can cause delayed shifts. Technician B says that delayed shifts can be caused by an open shift solenoid. Who is correct? a. Technician A only b. Technician B only c. Both A and B d. Neither A nor Barrow_forward
- While discussing Hall-effect vehicle speed sensor tests: Technician A says to use an ohmmeter to test the resistance of the coil. Technician B says that the voltage generated by the sensor can be measured by connecting a voltmeter across the sensors terminals. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardWhen an engine is running lean, the voltage signal from the oxygen sensor will be (low or high).arrow_forwardTrue or False? An A/F ratio sensor can be tested in the same way as an oxygen sensor.arrow_forward
- When testing a frequency varying MAF: Technician A says that the frequency should increase with an increase in engine speed. Technician B says that when observed on a lab scope, the signal from the sensor should be a square wave. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardwhat is meant by sensor bias voltage in automotivearrow_forwardA vehicle with a direct TPMS is brought into a shop with all sensors failing to read any pressure at all. Technician A says it’s likely that all 4 sensors died at once. Technician B says it may be due to a damaged or faulty TPMS antenna. Who is correct? Technician A Technician B Both Technician A and B Neither Technician A or Barrow_forward
- While diagnosing an electronic control system: Technician A turns the ignition off before disconnecting a connector or component. Technician B uses a jumper wire to bypass a potentially faulty sensor and then observes the scan tool. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardTechnician A says that the oxygen sensor provides the major input during the open-loop mode. Technician B says that the coolant temperature sensor input is not used during open-loop mode operation. Who is correct?arrow_forwardThe PCM checks for a closed throttle plate each time the engine starts. This becomes the base for all throttle settings and can be viewed by looking at the PID with the throttle closed. Which of the following would not cause an abnormal reading and a higher-than-normal idle speed? a. A bad TP sensor b. A bad IAC valve c. Loose or worn throttle plates d. Excessive noise in the TP or related circuitsarrow_forward
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