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In the course of using automobile, it is inevitable that there will be trouble. For experienced drivers, it is usually "one step" to find the problem. Most people are often helpless when they face trouble. Now come to learn to find a fault for yourself. In the course of using automobile, it is inevitable that there will be trouble. For experienced drivers, it is usually "one step" to find the problem. Most people are often helpless when they face trouble. Now come to learn to find a fault for yourself. The vehicle fault can be roughly divided into three parts: one is the circuit fault, the two is the oil road fault, and the three is the driving system fault, such as steering, braking, transmission part and so on. Among them, the circuit fault is divided into high voltage circuit and low voltage circuit fault. In actual use, about 60% of the vehicle's faults are circuit faults. 30%, on the oil circuit, most of these faults can be eliminated. Only about 10% are running system failures. These faults are mechanical faults. Most of the vehicles can still travel when they occur. They should be repaired at the special repair stations nearby. When you are in trouble, do not worry. Two, do not rush to start, first look at the situation of the fault indicator light. Calm down, analyze the phenomenon of failure, ask why? There are two methods to judge and distinguish the fault of the oil circuit: one is the sudden stalling or the slow quenching in the course of driving, and the sudden quenching is mostly the circuit fault, and the phenomenon of the slow quenching or the continuous "leap up" phenomenon of the vehicle is mostly oil road fault. The two is "trial fire". If there is no central high pressure fire and divided cylinder fire, it is a circuit fault. If there is a high pressure fire, the problem is in the oil circuit. Most of the mechanical faults are accompanied by abnormal sound. The sound changes with the speed of the vehicle. When the sound is stopped, the sound disappears and has no direct relationship with the fault of the oil circuit. With the "segment by side", the "focus" is locked in a particular place, first to understand what kind of fault is it, and to see if the external exception is first. For example, whether there is a circuit breaker, short circuit, whether the connection is loose, whether there is burning smell in the engine, whether the oil pipeline is leaking oil and so on. It is worth reminding that the current new cars are mostly "electric spray" cars, which are electronically controlled burning, with fewer faults, and the opposite of the old carburetor car failure probability. It needs to be remembered that, if the electric power injection car fails, it often needs a special computer detector, and the driver should not do it yourself, so as not to destroy the circuit program.