Tech Manual for Erjavec's Automotive Technology: A Systems Approach
6th Edition
ISBN: 9781133933731
Author: ERJAVEC, Jack, Thompson, Rob
Publisher: Delmar Cengage Learning
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Chapter 25, Problem 2ASRQ
To determine
The technician with correct approach.
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hile discussing NTC thermistors; Technician A says that some systems use this type of thermistor as a protection device. Technician B says that when there is high current in a circuit, the resistance of the thermistor increases and causes a decrease in current flow. Who is correct?
Chapter 25 Solutions
Tech Manual for Erjavec's Automotive Technology: A Systems Approach
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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- While checking an A/C compressor clutch coil clamping diode with a DMM, the meter shows infinite resistance when the diode is measured in both directions: Technician A says that the diode is open. Technician B says that all diodes should behave this way until a specified voltage is applied to them. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor Barrow_forwardWhile checking an A/C compressor clutch coil spikesuppressing diode with an ohmmeter, the meter shows infinite resistance when the diode is measured in both directions: Technician A says that the diode is open. Technician B says that all diodes should behave this way until a specified voltage is applied to them. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardWhen working on a high-voltage system, it is best to keep anyone who is not part of the service away from you and the car by creating a buffer zone around the car. Technician A makes sure the outside edges of the zone are at least one foot away from the car. Technician B places orange cones to define the outer boundaries of the zone. Who is correct? a. Technician A only b. Technician B only c. Both A and B d. Neither A nor Barrow_forward
- While discussing the results of a load test: Technician A says that if a battery fails a load test but the voltage rises above 12.4 volts when the load is removed, the battery should be replaced. Technician B says that if a battery fails a load test but the voltage rises above 12.4 volts when the load is removed, the battery is able to hold a charge. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardTechnician A says that the reserve rating of a battery is the amount of steady current that a fully charged battery can supply tor 20 hours without the voltage falling below 10.5 volts. Technician B says that ampere-hour ratings state how many hours the battery is capable of supplying 25 amperes. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardWhile diagnosing the control system of a BEV: Technician A begins by checking the voltage of the auxiliary battery. Technician B inspects all fuses, fusible links, wiring harness, connectors, and ground in the low-voltage circuit. Who is correct? a. Technician A only b. Technician B only c. Both A and B d. Neither A nor Barrow_forward
- True or False? Piezoelectric materials can emit a small amount of voltage when they are struck, squeezed, or exposed to vibration.arrow_forwardIn El systems using one ignition coil for every two cylinders: Technician A says that two plugs fire at the same time with the same voltage used by each spark plug. Technician B says that one plug fires in the normal direction (center to side electrode) and the other in reversed polarity (side to center). Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor Barrow_forwardWhile discussing voltage Technician A says that voltage is the force developed by the attraction of the electrons to protons. Technician B says that the force developed by the attraction of electrons to protons is called electromotive force and it is measured in volts. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forward
- While discussing electric motors: Technician A says that when there is high CEMF, there will be high current flow. Technician B says that if the reluctance of an electromagnet increases, its field strength increases. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardWhile diagnosing the location of a wire-to-wire short: Technician A checks the wiring of the affected circuits for signs of burned insulation and melted conductors. Technician B checks common connectors shared by the two affected circuits. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardWhile discussing charger connections: Technician A says nearly all BEVs currently sold in North America have an AVCON connector. Technician B says the connector currently used for DC fast charging on the Nissan Leaf and Mitsubishi i vehicles is based on the CHAdeMO standard. Who is correct? a. Technician A only b. Technician B only c. Both A and B d. Neither A nor Barrow_forward
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