What Are the Reasons for the Keyless Start System Not Detecting the Car Key in Winter?
3 Answers
The reasons for the keyless start system not detecting the car key in winter are: 1. The car key is out of battery or the battery has poor contact; 2. The low-intensity radio waves in the key are being interfered with; 3. There is an issue with the internal system of the keyless start. The functions of the keyless start include: 1. No need for the original car key or remote to open the car door; 2. Automatic closing of windows when leaving the car; 3. Beneficial for night driving; 4. Convenient starting with self-check and protection functions for the original car starting system. The method to turn off the engine with the keyless start is: 1. Press the brake pedal to bring the car to a smooth stop; 2. Shift the gear from D to N; 3. Engage the handbrake; 4. Release the foot brake without turning off the power; 5. Press the foot brake again and shift the gear from N to P; 6. Release the foot brake and press the keyless start button to turn off the power.
I often encounter issues with the key fob not being detected when starting my car in winter. Last time, on a morning with -10°C temperatures, I tried for a long time without any response. The main cause is low battery power in the key fob, especially since button batteries suffer from significantly reduced output power in cold weather, affecting signal transmission. The car battery may also provide insufficient starting current in cold conditions, impacting the entire keyless system. The solution is to first replace the key fob battery and try placing the key near the driver's side door handle or the start button; warming the key in your hands for a moment might help. For prevention, it's advisable to replace the key fob battery in autumn and regularly check the car battery's health. Also, keep the key fob away from electronic interference sources like mobile phones and ensure it stays clean and dry. Always carry a spare mechanical key for emergencies, so you won't be stranded in the cold.
In my work, I have dealt with numerous winter keyless start failures, with common causes including battery aging and temperature effects. The performance of CR2032-type batteries in the key fob deteriorates in low temperatures, leading to insufficient output voltage and causing induction failure. A weak car main battery can also affect the system's power supply. The recommended solution is to first test by replacing the key fob battery; if that doesn't work, use the mechanical keyhole to open the door or follow the manufacturer's backup start procedure. Preventive measures include a comprehensive check of the electrical system before winter, avoiding exposing the key fob to extremely cold environments, and parking in a garage to reduce freeze damage. Some vehicles are affected by humidity, and wiping the key fob contacts can help. Regular maintenance of the battery and circuits is a long-term strategy.
