Common diagnostic methods for automotive circuit and electrical faults
There are many ways to diagnose automotive circuits and electrical faults.
Release time:
2024-11-25
There are many ways to diagnose automotive circuits and electrical faults. The following car maintenance will give you a summary. As for when to use which diagnostic method, after reading will know some, do not understand the friends carefully consider.
1. Intuitive diagnosis method Intuitive diagnosis method is the first step in the maintenance of automobile electrical appliances, and it is also the simplest step. It only relies on the direct feeling and experience of the inspector to check and troubleshoot. When a component of the automobile electrical system fails, abnormal phenomena such as smoke, sparks, abnormal noise, coke smell, and high temperature will occur. Through the sensory organs of the human body, the appearance of automobile electrical appliances can be inspected by means of looking, smelling, asking, cutting, and smelling, so as to determine the location of the fault. For maintenance personnel with certain experience, some more complicated faults can be found, which greatly improves the maintenance speed. For example, when a car is driving, when the turn signal switch is turned on, it suddenly finds that the turn signal and turn indicator are not on. Touch with your hand and feel the flash relay heating, indicating that the flash relay has been burned out. When the electrical components work normally, there should be a suitable working temperature. If the temperature is too high or too low, it means a malfunction. For example: when the starter is running weak, if the battery pole is in poor contact with the wire, it will feel hot when touched.
2. The diagnostic method of the grounding ignition test is a method of testing the metal part of the car by removing one end of the wire of the electrical equipment, and judging the fault according to the intensity of the spark generated. This method is relatively simple, is the majority of automotive electrical and electronic maintenance workers often use a simple and convenient method. Systems using electronic equipment generally do not allow the use of this method, and must be carried out in accordance with certain methods with the help of some instruments and tools. Otherwise, the overcurrent generated by the "fire test" will cause unexpected damage to certain circuits and components.
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