Where is the central locking control box of the Passat located?
1 Answers
The central locking control box of the Passat is located under the driver's footwell, requiring the removal of the floor mat for access. The central locking system, short for Central Control Door Lock, is an automotive component that allows remote locking and unlocking of doors without inserting a key into the lock. It consists of a door lock switch, actuators, and a controller. The system primarily comprises two parts: a transmitter and a receiver. Detailed descriptions are as follows: Transmitter: The transmitter includes a transmission switch, transmission antenna (keypad), integrated circuit, etc. It is integrated with the signal transmission circuit on the keypad. From the identification code storage circuit to the FSK modulation circuit, it is miniaturized using a single-chip integrated circuit, with a button-type lithium battery installed on the opposite side of the circuit. The transmission frequency is selected based on the radio wave regulations of the country of use, typically operating in the 27, 40, or 62 MHz bands. Each press of the transmission switch sends a signal once. Receiver: The transmitter uses FM modulation to send an identification code, which is received via the car's FM antenna and processed by the distributor into the receiver ECU's FM high-frequency amplification circuit for demodulation. The demodulated identification code is then compared with the preset code; if it matches, the control circuit is activated, and the actuator operates.
