Reasons for Smart Grille Malfunction?
2 Answers
Due to rainy and non-hot weather, the grille panel remains closed and does not open. When the vehicle passes through a puddle, water pressure acts on the grille panel, causing it to move without a computer command. This movement triggers the grille motor, which then becomes mismatched with the computer control system, leading to the malfunction. As long as the grille motor is not faulty, this issue can be ignored, and the error code can be cleared using an OBD tool. The grille, also known as steel grating, steel grid, or grid panel, is welded from flat steel and twisted steel. Its primary uses include rest platforms, walkways, trench covers, and tread plates. It is also widely adopted in environmental protection equipment and wastewater treatment due to its increasing advantages. The gap width between grille bars can be set based on the method of debris removal and pump requirements. For manual cleaning, the gap is typically 16–25mm. Grilles before sedimentation tanks or settling ponds usually have gaps of 15–30mm, with a maximum of 40mm. There are three common mechanical cleaning devices: chain-type, mobile-type, and wire rope traction-type grille cleaning machines.
I found there are quite a few causes for smart grille malfunctions. First, electronic system issues, such as sensors being covered by dust and unable to detect speed or temperature changes, or the motor getting stuck due to prolonged exposure outdoors, where rain or dirt intrusion prevents the grille from opening or closing. Second, mechanical component failures, like plastic hinges aging and becoming brittle, especially more prone to breaking in cold winter temperatures—I once encountered this issue while driving in snowy weather, so regular cleaning and inspections are necessary to avoid blockages. Additionally, glitches in the control unit's software are common, possibly caused by update errors or unstable voltage. If you've recently tampered with the battery circuit, it can easily trigger a fault warning light. Finally, driving habits matter—frequent hard acceleration can cause the system to overheat and trigger alarms. It's advisable to adopt a gentle driving style and occasionally check if the cooling system is functioning properly, as this helps prevent engine overheating.
