What does the ACC position on a car's ignition switch mean?

[LePaisley]

ACC stands for Adaptive-Cruise-Control in English, which means adaptive cruise control power supply, providing power to some components such as the car audio system. A car's ignition switch generally has four positions: START, ON, ACC, and LOCK. Typically, when the car is parked and turned off, the key is in the LOCK position, where the vehicle's circuit is disconnected, and the entire car is powered off. Additionally, the steering wheel is locked. When the key is in the ACC position, some electrical devices in the vehicle are powered, such as the radio and audio system, but other components of the car remain unpowered. This is the main difference between ACC and ON. When the key is in the ON position, all components of the car are powered, including the engine system. The START position is for starting the engine; once the key is turned to START, the starter motor is powered and begins working. There are many buttons in a car, each with different functions, such as the window control button, window lock button, mirror adjustment button, and lumbar support adjustment button. The window control button allows the window to be fully lowered or raised with just one press, freeing the driver's left hand and enhancing driving safety and convenience. Higher-end models may offer one-touch control for all four windows, along with anti-pinch protection, where the window automatically lowers if it encounters an obstacle to prevent injury. The window lock button, when pressed, locks all windows except the driver's side window to prevent accidental operation by children. Some vehicles only lock the rear windows, depending on the model. The mirror adjustment button typically has this layout: to adjust the left mirror, move the toggle switch to the left and adjust accordingly, and vice versa for the right mirror. Many people don't know what the four-way button in a car is for—it's actually for adjusting lumbar support, usually found only in high-end models. The horizontal button adjusts the intensity of the lumbar support, while the vertical button adjusts the position of the support to suit different drivers or passengers.