AUTMOTIVE TECH, TECH MANUAL & MIND TAP
6th Edition
ISBN: 9781305383180
Author: ERJAVEC
Publisher: CENGAGE L
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Textbook Question
Chapter 25, Problem 1RQ
OBD II systems use several modes of operation. List three of them.
Expert Solution & Answer
To determine
OBD 2 system and modes of operation.
Explanation of Solution
The OBD system is an On-Board Diagnosis system. It can be installed in all cars and some light duty trucks. It helps in controlling the engine parts and it has proved its importance by keeping an eye on the other parts of a vehicle also. For example, chassis, accessories and other components of cars.
It helps in a vehicle’s maintenance and diagnoses the parts of a vehicle. It helps in producing less emission thus protecting the environment from harmful emission caused by a vehicle’s emission. The diagnosis or maintenance engine light is present at the dashboard. With these light signals, we can check the service needed and the problems caused to a vehicle. It is used for an overall scanning of the vehicle. If there is any problem in the vehicle, the light indicator will indicate so. It provides a list of codes which helps in running on-board diagnosis.
These diagnoses are carried out by collecting the information from the vehicle. This information is analyzed to come up with a suitable solution.
Modes of operation of this system are listed below:
- Live date track
- Freeze frames
- Diagnosis trouble codes.
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Chapter 25 Solutions
AUTMOTIVE TECH, TECH MANUAL & MIND TAP
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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