Common diagnostic methods for motor circuit and electrical faults
There are many ways to diagnose automobile circuit and electrical fault. The following automobile maintenance technology network will be summed up for you. As for when to diagnose, how much do you know after seeing it?
1, the intuitive diagnosis method is the first step and the simplest step to overhaul the automotive electrical appliances. The inspection and troubleshooting is based on the direct feeling and experience of the overhaul. When a part of the electric system of the automobile fault, will be abnormal noise, smoke, sparks, empyreumatic, high temperature etc.. Through the sensory organs of the human body, the way of looking, hearing, asking, cutting, and sniffing is used to check the appearance of automobile electrical apparatus, and the location of the fault can be judged. For the maintenance personnel with certain experience, some more complex faults can be found, which greatly improves the speed of maintenance. For example, when the car turns on the steering lamp switch, it suddenly finds that the steering signal and the steering indicator are not bright. With the touch of the hand, it feels that the flash relay is hot, indicating that the flash relay has burned down. When the electrical components are working normally, there should be a suitable working temperature. If the temperature is too high and too low, it will mean a failure. For example, when the starter is weak, if the battery pole is in bad contact with the wire, it will feel hot when touching.
A thread 2, ground test fire diagnosis method is to remove the electric equipment of metal part of the car touch test, the method of fault judging by the spark intensity. This method is simple, and it is a simple and convenient method for the maintenance workers of automotive electronics and electronics. In general, the system of electronic equipment is not allowed to use this method. It must be carried out in a certain way with the aid of some instruments and tools. Otherwise, “ the test fire ” the over current produced will bring unexpected damage to some circuits and components.