How to Start an Audi Q5L When the Key Fob Battery is Dead?
1 Answers
Audi Q5L can be started when the key fob battery is dead by placing the side with the logo printed on it against the start button, depressing the brake pedal, and then pressing the start button to ignite the vehicle. Generally, the key fob doesn't lose all its power at once; it will first reduce the remote control distance, indicating that there's still some power left. Placing the key fob near the one-touch start button can usually allow the vehicle to sense it and start, but the battery should be replaced as soon as possible. More details are as follows: 1. The car remote key utilizes the wireless remote control function of the central locking system, allowing doors to be opened and locked from a distance without inserting the key into the lock. Simply put, the working principle involves the key emitting 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 (motor or electromagnetic coil) performs the locking or unlocking action. This system mainly consists of two parts: the transmitter and the receiver. 2. Transmitter: Composed of a transmission switch, transmission antenna (keypad), integrated circuit, etc. It contains an identification code storage circuit and an amplitude modulation circuit, with a button-type lithium battery installed 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 the button is pressed. 3. Receiver: After the transmitter sends the identification code via shortwave modulation, it is received by the car's shortwave antenna and processed by the distributor into the receiver's electronic control unit for demodulation. The demodulated identification code is then compared; if it matches the correct code, it is input into the control circuit to activate the actuator.
