How to Lock the Car with a Spare Key?

[StAlyssa]

Spare keys can be categorized based on whether they come with a remote control. Below is a detailed introduction to their unlocking methods: 1. With a remote control: No different from the main key, it can remotely unlock the car. 2. Without a remote control: Only mechanical unlocking is possible. Here is supplementary information on the main functions of a car's smart key: 1. When approaching the car: As the driver brings the key in their pocket near the car, the key and the car begin exchanging preset command information via radio waves. Subsequently, the car's locking system, security system, and engine control system are all activated. 2. When opening the car door: As soon as the driver touches the door handle, sensors detect this pressure, and the servo motor unlocks the door while the turn signals flash twice. The seat, steering wheel, and exterior rearview mirrors then automatically adjust to the driver's preset position. 3. Before starting the car: When the driver presses the brake pedal, the steering wheel lock is released, the start button is enabled, and the parking brake is automatically disengaged. 4. When exiting the car: Upon exiting, the driver must press the lock button. If the turn signals flash once, it indicates that the doors are securely locked. Simultaneously, the key and the car establish a new command information protocol.