What to Do When the Car Remote Key Fails?
1 Answers
When the car remote key fails, first check for any signal interference sources around the vehicle, then eliminate the possibility of any installed wireless signal devices. If both are ruled out, try replacing the battery. If the issue persists, it may indicate a fault in the key's internal circuit board, requiring inspection and repair at a service center. Below is relevant information: 1. A car remote key utilizes the wireless remote control function of the central locking system, allowing doors to be opened or locked from a distance without inserting the key into the lock. Simply put, the key emits a weak radio wave, which is received by the car's antenna. The electronic control unit then identifies the signal code, and the system's actuator performs the locking or unlocking action. 2. The car remote key system mainly consists of two parts: the transmitter and the receiver. The transmitter includes components such as the transmission switch, transmission antenna, and integrated circuit. It contains an identification code storage circuit and an amplitude modulation circuit, with a button-type lithium battery on the opposite side of the circuit. The transmission frequency is selected according to the radio standards of the country of use, and the transmission switch sends a signal each time it is pressed. 3. The receiver: After the transmitter sends the identification code via shortwave modulation, the car's shortwave antenna receives it. The signal is then distributed to the shortwave high-frequency amplification processor in the receiver's electronic control unit for demodulation. The demodulated identification code is compared; if it matches the correct code, it is input into the control circuit, activating the actuator.
