Electronic control is used in the control systems of various parts of modern imported vehicles。
For example, engine oils, automatic gear transformers, body control, abs, etc. These control centres are commonly referred to as computers。
Currently, the technical level of many repair shops is significantly higher than in previous years and computer failure judgments are relatively accurate, but there is no way to maintain computers, and even the more skilled mechanics of vehicle engineering are simply replacing conventional diode triodes. He's dizzy when he encounters an integrated circuit. At the same time, while there is a great deal of information and book publishing on motor vehicle electro-jet maintenance, there is little information on maintenance within computers. Let us now turn to the attention given to the maintenance of the interior of the vehicle computer plate and to the usual equipment, and see how much it helps to maintain the vehicle computer。
I. Electronic hole:
In daily life, everyone has static electricity, up to thousands of volts. In testing computers, maintenance staff often feel that the failure has not been detected and is becoming more serious. In fact, at the time of the test, the body electrostatic had passed through the test point to a weak microprocessor and storage circuit, causing permanent damage. Such accidents can be effectively prevented if you have static gloves, one end on your hand and the other end on the computer's end。
Ii. Digital use table:
Many circuits in computers use extremely weak currents. If measured with small internal resistance or needle-type voltage meters, the reverse voltage of the circuit of the instrument may damage the computer. Therefore, circuits are measured using digital instruments with internal resistance greater than 10m。
Iii. Large current multiple circuits to stabilize voltage
Many maintenance staff have a steady voltage power source, but the output is small, usually below 5 ampere, and generally usable, but there is nothing to do about the oil-jet tests in computers. Currently, computers of various types use power sources of 12v, 8v, 5v, typically wingboard air flow meters, various sensors, and internal power sources of computers. Five volts are the power supply for most circuits inside the computer. In the maintenance of computers, it is important to first understand the power within the computer. The dynamic testing of inner parts of computers would be easy and more convenient if there were 15 amber passages to stabilize the voltage power. It can also be used to test most electronic products in cars。
Iv. Oscillators:
It is the most convenient and efficient tool for computer repair. In the maintenance process, we often encounter computers that do not refuel and do not ignite. Many maintenance staff do not use oscilloscopes, but only randomly test conventional metre devices such as internal transistors. Traditional circuit tests do not work, but they must be welded together for measurements. If welding of large-scale chip installation elements cannot be tested, considerable effort is required to achieve results. In fact, in addition to testing the power of the computer, we need to use the oscilloscope first to see if there are programs in the memory, and then expand the tests outward based on the existence of programs. Final power is normal. Of course, replacement of cpu and associated components is repairable. It is difficult to detect malfunctions if the maintenance staff does not use oscillators. Of course, we can also connect to microcomputers for program measurements in computer memory. If a program can be stored on a hard drive via a microcomputer, if a computer does not have a program in the future, then the program can be replicated by chip, so that the rate of repair of the computer is significantly increased. In addition, oscillators can test voltage, wave shape and frequency in any part of the circuit. If conditions permit, an additional 50 megabit digital frequency meter can be added to accurately measure the frequency of the crystal oscillator. Poor computer performance is also common due to frequency deviations in computers due to, inter alia, crystallization。
V. Qd1 car computer detector
The test instrument is specially designed to test and maintain the computer. Virtually all types of car fuel systems, ignition systems, various sensors, glitch valves, magnetic receptors, photovoltaic pulse signals, large currents, etc. As long as the function of each foot of the computer is checked, it is possible to dock with the instrument, as in the car, with actual oil injection, a glitch valve action, and with an oscillator, the failure point can be quickly identified。
In any event, the computer boards of cars are irretrievable accessories abroad, as prescribed by the manufacturer, and are cheap. If it's broken, you need a new one. However, computer boards in the country are currently too expensive to buy. If we learn more about the workings of some computers, any type of computer can find the functionality of each foot and draw internal circuits without having to test them in the car. With the equipment, many computers can be repaired. Of course, if a microprocessor or a special part is broken, it will only end up dead unless you do。
