How to Install Dynamic Trajectory Lines if the Original Vehicle Doesn't Have Them?
2 Answers
If you want to install dynamic reversing trajectory lines, you need to obtain the steering angle data of the front wheels, so a steering angle sensor must be installed. Generally, dynamic reversing trajectory lines are only available on some luxury cars, and compact cars or family vehicles usually don't come with this feature.
Honestly, adding dynamic trajectory lines requires careful methodology. If the original car's infotainment screen supports a rearview camera but lacks trajectory lines, the most reliable solution is installing an algorithm-equipped trajectory module. This device is roughly palm-sized and needs to connect to the steering wheel angle sensor signal, vehicle speed signal, and be wired in series with the rearview camera feed. Those with strong DIY skills can attempt it themselves, but wiring is particularly troublesome – requiring dashboard trim removal to access the steering angle sensor and routing cables from the trunk to the rear camera. I recommend directly consulting professional modification shops, as they use dedicated plug-and-play wiring harnesses that simplify the process significantly. The entire job (labor + parts) typically costs around 500 RMB for standard vehicles. Note that some older models may require a protocol converter to read signals. Once installed, engaging reverse gear while turning the wheel will make yellow arced lines on the screen synchronize with wheel movements – especially useful for U-turns in narrow spaces.
