How to Open the Car Door When the Entire Vehicle Has No Power?
2 Answers
If it is a conventional folding key, you can directly use the mechanical key to open the door when there is no power. The basic components of a remote key are as follows: 1. Transmitter: Composed of a transmission switch, transmission antenna, integrated circuit, etc., it includes an identification code storage circuit and an amplitude modulation modulation circuit, with a button-type lithium battery installed on the opposite side of the circuit. The transmission frequency uses radio waves, and each press of the transmission switch button sends a signal once; 2. Receiver: After the transmitter sends the identification code using shortwave modulation, it is received by the car's shortwave antenna and enters the shortwave high-frequency amplification processor of the receiver's electronic control unit through a distributor for demodulation, where it is compared with the demodulator's identification code.
That day when I went on an outing, my car suddenly lost all power, and the doors wouldn't open no matter what, making me sweat with anxiety. Later, I remembered that every car door has a mechanical keyhole hidden near the door handle. My remote key had a small metal piece that could be pulled out and used as a key. After aligning and turning it in the hole, the door opened. After that lesson, I often check the battery level and keep a spare key stuck under the car or at a friend's place just in case. If the hole is covered with dust, gently scrape it open with the key—never yank the door handle forcefully, as it can damage the lock cylinder. It's best to test the remote function before driving to ensure the doors respond normally, which helps detect issues in advance.
