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What does the ACC line mean?

5 Answers
JoannaLynn
09/04/25 2:53am
ACC line is the power-on wire, which represents the ACC power line controlled by the car key. The Chinese meaning of ACC is Adaptive Cruise Control power supply, generally controlled by the car key to power components such as the car audio system. The Adaptive Cruise Control system is an intelligent automatic control system developed from the existing cruise control technology. ACC not only has all the functions of automatic cruise control, but can also monitor the road traffic environment in front of the vehicle through sensors like onboard radar. When detecting other vehicles ahead in the current lane, it will control the vehicle's throttle and brakes for longitudinal speed adjustment based on information such as relative distance and speed between the vehicles, maintaining an appropriate safe distance. Location of the ACC line: There are two fuse boxes in a car, one located below the steering wheel on the left side, and another near the battery in the engine compartment. The ACC line is located in the fuse box below the steering wheel on the left side.
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MacColton
09/16/25 4:06am
The ACC wire is the electrical line controlled by the ACC position on the car's ignition switch. ACC stands for Accessory, meaning auxiliary equipment. When the key is turned to ACC, it powers devices like the radio, cigarette lighter, or other small accessories. For example, you can use it to charge your phone or listen to music after parking, but since the engine isn't running, it won't consume much fuel. With decades of driving experience, I'm very familiar with this feature. I often turn on ACC to listen to the radio during breaks, but you must be careful not to leave it on too long, as it can drain the battery and prevent the car from starting. The ACC circuit is uniquely designed in the car's electrical system to save energy, and mechanics often use it to test accessory functions. New car owners might overlook its importance, but I recommend learning about it and developing good habits to avoid battery drain. Always consider whether you need to start the engine before using ACC.
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AdrianLynn
09/16/25 4:08am
ACC line? I didn't understand it when I first bought my car either. Later, a friend told me that ACC stands for Accessory. When the car key is in the ACC position, it can power the cigarette lighter or audio system without starting the engine. I remember one time during a picnic, I used the ACC to charge my phone, and the battery drained rapidly. That's when I learned it's only for short-term use, otherwise it can harm the car. Now I simply understand the ACC line as a dedicated circuit for small devices. It's convenient when parked, but it's not safe to leave it running idle for long periods. Young car owners, don't waste electricity like I did when I was a beginner. Learning some basic car knowledge can save you a lot of trouble. It's always good to consult professionals or look up information.
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ThomasLee
10/30/25 4:41am
The ACC line refers to the circuit corresponding to the ACC position of the vehicle's ignition switch. It powers auxiliary devices such as audio systems and charging ports in the ACC position but does not start the engine. Safety-wise, it's important to use it reasonably. If the ACC is left on for extended periods to listen to music or charge devices, the battery may drain, making it impossible to start the car. I always remind myself to use the ACC briefly only when necessary, ensuring the electrical system functions properly to avoid risks. Regularly checking the wiring connections also helps.
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StReagan
12/13/25 4:49am
In automotive terminology, the ACC wire is short for Accessory circuit, corresponding to the ACC position of the ignition switch. When the key is turned to this position, it powers accessories like the radio or cigarette lighter while keeping the engine off. Compared to other positions: OFF turns everything off, ACC is for accessories, ON powers the entire system, and START cranks the engine. The ACC position is designed for convenient temporary operations, such as listening to music while parked and waiting. It's recommended to refer to the owner's manual for better understanding, as familiarizing yourself with your vehicle's electrical setup allows more effective use of the ACC function.
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