Automotive Technology
7th Edition
ISBN: 9781337794213
Author: ERJAVEC, Jack.
Publisher: Cengage,
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Textbook Question
Chapter 25, Problem 2TF
True or False? An A/F ratio sensor can be tested in the same way as an oxygen sensor.
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4- Measure the voltage of the sensor lines.
5- In the event of a malfunction in the incoming air temperature sensor, what is its
effect on the operation of the electronic fuel system?
Which of the following is not a voltage-generating type sensor?
vehicle speed sensor
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MAP
ISS
Technician A says that many oil pressure
sensors are typically variable resistors that
change resistance based on pressure changes.
Technician B says that a sensor substitution
box can be used in place of the sensor while
observing the reaction of the oil pressure
gauge on the dash. Who is correct?
Select one:
a. Technician A
b. Technician B
c. Both A and B
d. Neither A nor B
Chapter 25 Solutions
Automotive Technology
Ch. 25 - OBD II systems use several modes of operation....Ch. 25 - List the four ways that individual components can...Ch. 25 - Prob. 3SACh. 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 - 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 - Which of the following statements about zirconium...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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- When an engine is running lean, the voltage signal from the oxygen sensor will be (low or high).arrow_forwardWhat is the correct way to check a coolant temperature sensor?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_forward
- Which 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_forwardA typical normal oxygen sensor signal will toggle between and volts.arrow_forwardBecause modern engines heat up rapidly heated oxygen sensor (ho2s) are not required. True Falsearrow_forward
- A 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_forwardTechnician A says that some types of voltage sensors provide input to the computer by modifying or controlling a constant, predetermined voltage signal. Technician B says that a coolant temperature sensor is a voltage-generating sensor. 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_forward
- A CKP sensor can be checked with all of the following except a(n). a. logic probe b. voltmeter c. ammeter d. lab scopearrow_forwardA TPMS sensor is being replaced. Technician A says that if you replace it with a manufacturer specific TPMS, you need to program the sensor before install. Technician B says that all manufacture specific TPMS sensors use a 315 MHz radio frequency. Who is correct? Technician A Technician B Both Technician A and B Neither Technician A or Barrow_forwardWhat is a TPS sensor?arrow_forward
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