BYD F3 Disabling the One-Minute Auto-Lock Feature
3 Answers
Disconnect the power for 15 minutes, then reconnect to see if it resolves the issue. Alternatively, after unlocking the door, insert the spare key within 15 seconds, turn it to the ON position to illuminate the dashboard (note: only illuminate the dashboard without starting the engine), and then turn it off for 10 consecutive cycles to force disable the feature. You can refer to the key markings: OFF-ACC-ON-START, where OFF-ON and ON-OFF count as one cycle. The working principle is as follows: 1. Integrated chip; most electronic car anti-theft devices contain an integrated chip with internal switches that output a positive voltage to the drive circuit when an external trigger voltage is applied, activating the actuator and alarm circuit. 2. External voltage; the external voltage is applied via sensors or switches, ensuring concealment and tamper resistance. 3. Interconnected circuits; factory-installed anti-theft systems in electric vehicles operate similarly to electronic anti-theft devices but with interconnected circuits primarily designed to lock the system. 4. Network-based anti-theft; these systems offer enhanced functionality compared to electronic anti-theft devices, including sending alerts to the owner's phone and the ability to lock the system. Phone-based GPS can locate the vehicle within a specific range.
When I first drove the BYD F3, I was also particularly annoyed that it would automatically lock one minute after unlocking, often leaving me locked out when I forgot something. As a frequent highway driver, I checked the manual and found the solution quite simple: insert the key but don’t start the engine, then look for the control buttons around the steering wheel or enter the settings menu on the dashboard. Find the door lock section and change the 'auto-lock time' to zero or turn it off. After making this change, it was such a relief, especially during trips with frequent stops—no more scrambling to unlock the car. However, this feature is originally designed for anti-theft, so after disabling it, remember to manually lock the doors in crowded areas to prevent theft—safety first. I suggest you try it too. If you’re unsure, take a photo and send it to BYD customer service—they usually reply quickly.
If I were a mechanic, I would say this issue with the BYD F3 involves the electronic module control. The key to resolving it is adjusting the parameters: Sit in the car and close all doors, press the remote unlock button three times and hold it while turning the key to the ACC position. A beep sound indicates the setup mode is activated. Then, navigate to the options on the central control screen to modify the locking settings and disable the timer. After cancellation, the key function will return to normal, but battery consumption might be slightly higher. I've repaired similar cars before—this feature is designed to prevent battery drain from doors left slightly open. Turning it off makes daily use much more convenient, especially for scenarios with frequent short trips and stops. Remember not to tamper with other settings randomly. The manual includes illustrated steps, and if all else fails, a visit to the 4S store for a small fee will get it sorted.
