What does 'sweeping the line' mean?

[IsabelFitz]

Sweeping the line is a foul term in the driving license subject two exam. Introduction to sweeping the line: It refers to the wheels pressing against the line or the vehicle body crossing the line. During the exam, the vehicle must not sweep the line at any time, let alone press against it. It's also important to note that during reverse parking, it's not just about the wheels not pressing the line; the vehicle body must not cross the line either, as crossing the line results in failure. Subject two evaluation criteria: During the subject two exam, not following the prescribed route or sequence results in failure. The vehicle body pressing the line or failing to complete reverse parking results in failure. Taking more than 210 seconds to complete reverse parking results in failure. Stopping midway deducts 5 points each time.

[CooperAnn]

The issue of scanning lines has occurred several times during my driving experience. Simply put, it's when horizontal lines or unclear images appear on the screen while reversing, making it feel like signal interference, which is quite frustrating. Back then, I had just gotten a new car, and the reversing camera suddenly displayed distorted images with a 'scanning line abnormality' warning, leaving me flustered and nearly causing me to hit a wall. Later, when I took it to the repair shop, the technician explained that this was due to poor wiring contact in the rearview camera or aging of the camera itself, causing the scanning system to malfunction. After reconnecting and cleaning it, the issue was resolved. Since then, I've learned my lesson: I make sure to avoid water getting into the camera hole during car washes and regularly clean the lens to keep it clear. After all, parking assist systems are crucial, and any malfunction can compromise safe driving. I recommend that car owners pay more attention to maintenance and address any signs of trouble promptly to avoid unnecessary expenses.

[DeKai]

I have a habit of tinkering with electronic faults in my car, and scan line issues are one of the more common problems. To be specific, it usually refers to the abnormal display of scan lines in the camera signal processing, which could be caused by loose connectors or wiring harness wear. My usual approach is to first turn off the power, open the trunk to inspect the rearview camera connection, and use a multimeter to check for short circuits. If there's any wiring damage, I solder it myself to save on labor costs. However, I must remind everyone that if you're not confident, don’t randomly disassemble the circuits—it’s easy to damage more components, especially when dealing with safety systems and other precision parts. It’s safer to take it to a professional shop for a comprehensive diagnosis. The last time I fixed a scan line issue, it took me half an hour with just a screwdriver and a multimeter. Cleaning off some dust resolved the problem—it was actually quite simple, but you need to be careful to avoid creating new issues.

[ChristopherAnn]

Scan lines were a new concept to me until I bought a car with parking assist. In the automotive camera system, they appear as messy horizontal streaks on the display, resembling TV static, which affects reversing visibility. At first, I didn't understand and thought the screen was broken, sweating with anxiety. Later, I checked the manual and learned it was either a camera scanning issue or damaged wiring, so I rushed to the repair shop. The technician explained it's a common minor electronic glitch caused by aging or water seepage, and replacing the parts fixed it. He advised new car owners not to panic if encountering this—first observe the symptoms before taking action. Regular maintenance can prevent such issues, avoiding worsened problems from mishandling.