By Steve V. Hatch
Offering reliable assurance of either household and imports, automatic ENGINE CONTROLS, 9e equips readers with the foundational wisdom had to effectively diagnose and service motor vehicle digital platforms. Reflecting the newest technological advances from the sphere, the 9th version bargains up to date and elevated assurance of the method of diagnostics, air/fuel ratio sensors, OBD II, and masses extra. this article comprises in-depth perception into such state-of-the-art issues as hybrid and gas cellphone autos, GMs 42-volt approach, hexadecimal conversion, multiplexing, and good judgment gates. Key options are bolstered with ASE-style, end-of-chapter inquiries to familiarize readers with the kinds of questions they're prone to see in certification trying out.
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If transistors B are turned on, the direction of current flow through 12 V 12 V B A M B A Figure 1–53 An H-gate. © Cengage Learning 2012 the motor is reversed. The computer turns on the transistors in pairs only, either transistors A or transistors B. This is common in DC motors and stepper motors (discussed in Chapter 3) that are used to control the engine’s idle speed. H-gates are also used in controlling motorized shoulder safety belts and temperature/mode doors in heating, ventilation, and air conditioning systems.
A. 5 ⍀ B. 15 ⍀ C. 20 ⍀ D. 40 ⍀ 11. A parallel circuit has three branches. One ranch has a load with 18 ⍀ of resistance. 5 ⍀ of resistance. The third branch has a load with 30 ⍀ of resistance. What is the total resistance of the parallel circuit? A. 5 ⍀ B. 18 ⍀ C. 5 ⍀ D. 5 ⍀ 12. A series circuit has two loads. The first load has 10 ⍀ of resistance and the second load has 30 ⍀ of resistance. What is the total resistance of this circuit? A. 5 ⍀ B. 15 ⍀ C. 20 ⍀ D. 40 ⍀ 13. Which of the following could affect the ability of an electrical circuit to operate properly?
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