What does 'test' on the dashboard mean?
2 Answers
When 'test' appears on the car dashboard, it indicates a fault detection alert. Fault detection refers to the vehicle system's self-diagnosis to determine which component has malfunctioned when the car experiences operational issues, and then notifies the user through indicator lights or other methods. The dashboard indicator lights mainly fall into three categories: 1. Routine indicators - These are the most common during normal driving, including turn signal indicators, light indicators, seatbelt reminders, cruise control indicators, and parking brake indicators. They simply indicate the operational status of various vehicle functions. 2. Warning indicators - Such as low fuel warnings and windshield washer fluid level warnings, these alert drivers to promptly replenish the corresponding fluids. 3. Fault indicators - Including engine (exhaust system) malfunction lights, oil system warning lights, and battery/charging system warning lights.
When I first started learning to drive, the flashing lights on the dashboard always made me nervous. Later, a mechanic told me that this was the car's self-check process during startup. When you turn the key or press the start button, all indicator lights briefly illuminate to test the system status, such as the engine light, oil pressure light, or airbag light. If everything is fine, they will automatically turn off after a few seconds. But if a light stays on, it indicates a potential issue—for example, a constantly lit ABS light suggests a problem with the anti-lock braking system. The self-check is a safety feature that helps detect problems early. I always pay attention to the lights before driving to avoid issues on the road. New drivers shouldn’t worry—this phenomenon is normal during startup, and you’ll get used to it over time.
