What is the reason why the sunshade curtain of BYD Song's sunroof cannot be closed?
3 Answers
The reasons why the sunshade curtain of BYD Song's sunroof cannot be closed are incorrect initialization position, sunshade curtain motor failure, circuit failure, and communication signal failure. The following is an introduction to car sunroofs: 1. Car sunroofs are installed on the roof, which can effectively circulate the air inside the car and increase the intake of fresh air. At the same time, car sunroofs can also broaden the field of vision and meet the shooting needs of mobile photography and videography. Car sunroofs can be roughly divided into: sliding-out type, built-in type, built-in flip-out type, panoramic type, and curtain type. They are mainly installed on commercial SUVs, sedans, and other models. 2. Built-in sunroof refers to a sunroof where the sliding assembly is placed between the interior and the roof. Its advantage is that the sunroof opening is large, and the appearance is simple and beautiful. Most sedans use built-in sunroofs. 3. The flip-out sunroof has the advantages of small size and simple structure. In addition, car sunroofs are installed on the roof, which can effectively circulate the air inside the car and increase the intake of fresh air, bringing healthy and comfortable enjoyment to the car owner.
I've repaired many BYD Song model sunshade issues, with the most common causes including dust accumulation or debris blockage in the tracks, causing the shade fabric to get stuck midway; drive motor failure where aging or circuit overload can easily burn out the motor coils; malfunctioning switch buttons where poor contact may interrupt signal transmission; wiring problems such as short circuits in power lines or blown fuses cutting off power supply; or control module software errors triggering misoperation. Recommended actions are to first check track cleanliness, using a soft brush to remove dust and debris; if no improvement, inspect the fuse box to see if fuses are intact; if still ineffective, avoid forcing operation to prevent part damage and go directly to a professional repair shop for motor or circuit diagnosis. Remember to perform regular maintenance, cleaning the tracks and applying lubricant every six months to prevent jamming issues.
My Song model also had an issue with the sunshade not closing last year. At that time, I found small stones stuck in the track obstructing movement, and managed to remove them myself using small pliers, which fixed the problem. If cleaning doesn't help, it might be due to a burnt-out motor or oxidized switch contacts causing poor connection. Avoid pulling the shade forcefully to prevent material tearing; first, try pressing the switch—if there's no response, it could be a blown fuse, which you can check and replace by opening the fuse box under the glove compartment. Over time, sunroof components tend to accumulate dust and wear out, so it's advisable to simply wipe the track surface monthly to remove dust. If the issue persists, visit a 4S shop to check the circuit or replace the motor, preventing long-term neglect from causing bigger faults. Cost-wise, minor repairs might only require a few dozen yuan.
