What are the main types of basic methods for automotive fault diagnosis?
2 Answers
There are two types of automotive fault diagnosis methods commonly used domestically: one is the intuitive diagnosis method, and the other is the instrument detection method. More information about automotive fault diagnosis methods is as follows: 1. Intuitive diagnosis method: This primarily relies on manual observation and perception, using simple tools to amplify or temporarily conceal individual symptoms for diagnosis. It does not require any equipment and is not restricted by conditions such as location, allowing diagnosis to be performed anytime and anywhere. The speed and accuracy of diagnosis depend on the complexity of the fault factors and the technical level of the diagnostician. 2. Instrument detection method: This involves using detection equipment and instruments to measure the necessary technical parameters of the vehicle and compare them with the parameters under normal technical conditions, thereby diagnosing the fault.
I've been repairing cars for many years, and the basic methods for diagnosing car faults mainly fall into these categories: First is the visual inspection, using your eyes and ears to check for oil leaks, unusual noises, or burnt smells. Don't underestimate this step—80% of problems can be spotted here. Next is instrument diagnosis, such as plugging in an OBD scanner to read fault codes, which can precisely locate engine or circuit issues. Then there's the substitution test, where you replace suspected parts with new ones to test, like bulbs or fuses, which are easy to handle. The segmentation method is also very effective—dividing complex wiring into smaller sections for step-by-step troubleshooting to avoid blind disassembly. Lastly, there's experience-based judgment, combining past cases for quick reasoning, such as identifying unusual noises possibly due to aging suspension. Preventive maintenance is key; regular checks of fluids and belts can save a lot of trouble. Always wear gloves for safety when working.
