What are the diagnostic methods for car faults?
2 Answers
Car fault diagnostic methods are: 1. Touch method: Diagnose overheating or looseness of mechanical parts, and pulsation of high-pressure fuel pipes. 2. Sensory method: During driving, the car pulls to one side, the turn signal doesn't light up, the exhaust pipe backfires or emits black smoke, or a tire bursts. 3. Trial method: If a cylinder in the engine is not working properly, you can use the method of cutting off the spark or fuel supply to each cylinder one by one to identify the issue. 4. Comparison method: Replace and compare with new spark plugs or injectors against the original ones. 5. Testing method: If the car wobbles or the tires wear unevenly, specialized tests are needed to identify the cause using instruments and then eliminate the problem.
When I first started driving, I encountered a few minor malfunctions. Diagnosing car problems can actually start with the most basic senses. For example, if you hear strange noises or smell something burning while driving, you should pull over and check. I would first listen to see if the sound is coming from the engine or other parts, and look for any smoke or oil leaks. Then, I’d pop open the hood and manually inspect key components, such as whether the battery connections are loose, if the oil level is sufficient, or if the coolant level is normal. If any warning lights on the dashboard come on, like the engine light or ABS light, I’d note the situation and try restarting the car to see if they disappear. If the issue persists, I’d check the owner’s manual for related trouble codes or use a simple OBD scanner via a mobile app to read the error codes. If I can’t resolve it myself, I’d drive straight to a repair shop instead of pushing my luck and risking safety hazards. Regular maintenance is key—checking tire pressure and the battery monthly can prevent many minor issues. Remember, safety comes first; never diagnose on the highway—pulling over is crucial.
