By Al Santini
Cutting-edge car technicians desire a thorough realizing of electric ideas and digital platforms to carrier smooth cars. With this publication, you could discover how car electronics paintings, the position they play in a vehicle's basic operation, how and why technicians use attempt tools, and customary analysis and service tactics. The textual content presents an excellent grounding within the basics of electrical energy and electronics, supplying you with the basis you want to grasp complicated issues corresponding to batteries, beginning and charging platforms, ignitions, and electric add-ons. functional trying out methods are lined in addition, together with using either universal store instruments and hugely technical apparatus. The textual content additionally contains up to date insurance of present platforms, instruments, and J1930 terminology.
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Extra resources for Automotive Electricity and Electronics
The pressure difference will move the water from a higher to a lower pressure. Electricity is much the same. If a pressure of 12 volts is applied against a pressure of 4 volts, the electrons will move fiom the higher 12 volts toward the lower 4 volts because of the 8-volt difference. We should also realize that voltage can be positive or negative. This is called polarity and is simply the type of charge or pressure on the electrons. Let us try some examples. Refer to Figure 3-4. Notice that the - 12 Volts 0 Volts e Electron movement because there is 12 Volts difference e - 12 Volts 12 Volts e No electron movement - 0 Volts 12 Volts e Electron movement 4 $ ?
You will need to have a The third piece of equipment that you will find is the scanner (Figure 2-3). A scanner allows the technician to view data from the vehicle's powertrain control module (PCM). The scanner also allows the technician to' control a system or component and monitor the results. The technician who diagnoses and repairs the PCM systems is required to have a scanner. Many technicians have more than one, especially if their scanners are dedicated to specific manufacturers. Like the DSO, most scanners are software-driven so that vehicle data for each model year can be loaded into the scanner.
Electricity, defined as moving electrons, would react in the same manner. Without pressure, or voltage, behind the electrons, they would not move and would remain in the wire, or conductor. Voltage should be thought of as a pressure difference, which will cause electron movement. Look at Figure 3-3. In the top example, water flows because there is a pressure of 12 pounds per square inch from the left. But notice in the bottom example that water will also flow where a pressure of 12 pounds per square inch is pushing against 4 pounds per square inch and still pushes or moves the water to the right.