Universal keyless entry

Types of universal keyless entry

A universal keyless entry system uses remote controls and transmitters to lock and unlock doors without using traditional keys. This system comprises various types:

• Remote keyless entry (RKE)

  Remote keyless entry (RKE) uses a remote control device, such as a key fob, to control the car's locks. Users can lock and unlock doors with buttons on the key fob. The key fob sends a coded radio signal to the car's receiver, allowing access to the vehicle. RKE enhances security because it is difficult to replicate the coded signal. Some key fobs have extra buttons for opening the trunk or activating panic alarms. RKE systems also have rolling codes that change every time the remote is used. This feature prevents code grabbing, where thieves copy the lock code and unlock the car.

• Smart key systems

  Smart key systems provide the ultimate keyless entry experience. They allow drivers to unlock and start their vehicles while the key fob remains in their pockets or purses. Smart key systems continuously send low-level signals between the fob and the car. Proximity sensors detect when the driver approaches, unlocking the doors automatically. Inside the car, the start/stop button allows engine ignition with a smart key. No key is needed for ignition. The smart key system adds convenience and enhances security with features like biometric sensors that recognize authorized users.

• Push-to-start ignition systems

  Push-to-start ignition systems work with keyless entry. Instead of turning a key in the ignition, drivers press a button to start the engine. The key fob must be inside the vehicle or close to the ignition system for the button to work. Many modern cars have a keyless ignition switch. Some systems have multiple button presses for different engine states, like off, on, or run. Fail-safe mechanisms prevent unintended engine starts. Push-to-start systems add comfort and modernize vehicle access.

• Keypad entry systems

  Keypad entry systems allow door locking and unlocking using a personal identification number (PIN). A numeric keypad on the door's exterior accepts the user-entered PIN. Keypad systems offer an alternative to traditional keys. They are useful in situations where key fobs or physical keys are inaccessible. Keypad entry systems enhance security by allowing access only to those who know the PIN. Some systems let owners program multiple PINs for different users.

Specification and Maintenance of Universal Keyless Entry

The specifications of a universal keyless entry system can vary depending on the technology used and the specific features offered. Here are some common specifications that may be included in a universal keyless entry system:

• Range

  The operational range for keyless entry systems is often between 1-5 meters (3-16 feet). The distance may vary depending on the environment and any potential interference.

• Frequency

  Keyless entry systems operate on 315 MHz or 433 MHz radio frequencies. These frequencies are used for short-range communication between the key fob and the vehicle's receiver.

• Security Features

  Rolling code technology is used to prevent code grabbing attacks. This technology changes the code every time the remote is used, making it virtually impossible for hackers to replicate the code. Some keyless entry systems also use encrypted communication between the key fob and the vehicle's receiver. This encryption adds an extra layer of security by ensuring that only authorized signals can unlock or start the vehicle.

• Power Supply

  Keyless entry remotes are typically powered by small batteries like CR2032 or CR2016. These batteries provide the necessary power for the remote's operations, including transmitting radio signals to the vehicle.

• Receiver Unit

  The receiver unit in the vehicle is responsible for receiving signals from the key fob. This unit is typically integrated with the car's central locking system and is powered by the vehicle's electrical system.

• Code Transmission

  Keyless entry systems use fixed code or rolling code transmission methods. Fixed code transmission sends the same code every time the remote is used. In contrast, rolling code transmission changes the code with each use, adding an extra layer of security to the system.

Maintaining a universal keyless entry system is essential to ensure its longevity and reliable operation. Here are some general maintenance tips:

• Battery Care

  Regularly check the batteries in both the key fob and the receiver unit. Replace batteries as needed to ensure optimal performance. When replacing batteries, always use the recommended battery type for the key fob and receiver unit.

• Cleanliness

  Keep the key fob and the receiver unit clean and free of dirt and debris. Use a soft, damp cloth to clean the key fob and the receiver unit regularly. Avoid using harsh chemicals or abrasive materials when cleaning, as these can damage the devices.

• Moisture Protection

  Keep the key fob and the receiver unit dry and protected from moisture. If the key fob gets wet, remove the battery immediately and allow the device to dry completely before replacing the battery. Protect the receiver unit from moisture exposure, as this can damage the internal components and cause the system to malfunction.

• Signal Interference

  Keep the key fob away from devices that may cause signal interference, such as cell phones, Wi-Fi routers, or other electronic devices. If the key fob's range decreases, check for potential sources of interference and move them away from the key fob and the vehicle.

• Physical Damage

  Inspect the key fob and the receiver unit for any physical damage, such as cracks, dents, or broken buttons. If any damage is found, repair or replace the affected devices to maintain the system's functionality. Regularly check the wiring and connectors of the receiver unit in the vehicle for any signs of wear or damage. Replace any damaged components as needed to ensure the smooth operation of the keyless entry system.

How to choose universal keyless entry

To select the right keyless entry remote system for any car, consider the following factors:

• Compatibility

  It is important to ensure that the keyless entry system is compatible with the specific make, model, and year of the car. The compatibility eliminates the potential issues that may arise from using a system that is not designed to work with the car's electronics. Universal keyless systems use a generic frequency and may not work with all cars.

• Security Features

  Modern keyless entry systems come with enhanced security features. These features include rolling code technology, which changes the code every time the remote is used. The rolling code technology prevents unauthorized access to the vehicle and reduces the risk of code-grabbing attacks. The system also has encrypted communication between the remote and the receiver, making it difficult for hackers to intercept.

• Ease of Installation

  Some keyless entry systems are easy to install and can be done by following instructions provided by the manufacturer. The DIY systems come with detailed manuals that guide car owners through the installation process step by step. However, some systems require professional installation because they are complex or need integration with the car's alarm system. The professional installation ensures that the system works properly and all security features are activated.

• Additional Features

  Universal keyless entry systems come with additional features that improve convenience and security. These features include remote trunk release, keyless start, and two-way communication. The two-way communication between the remote and the receiver allows the remote to signal back to the user. The remote may display information like the car being locked or unlocked, ensuring users are aware of the actions being performed.

• Quality and Reliability

  It is important to consider the quality and reliability of the keyless entry system. Keyless entry systems from reputable manufacturers are of high quality and last long. The systems also have reliable performance with fewer failures. Car owners can read reviews or ask for recommendations from other car owners to know the experiences they had with different keyless entry systems.

• Price

  The price of the keyless entry system is an important consideration, but it should not be the only factor. Car owners should compare the features, security, and quality of different systems within the budget. Some keyless entry systems have advanced features that increase the price but offer more convenience and security.

How to DIY and Replace Universal Keyless Entry

Installing a keyless entry system is a straightforward DIY task that can be accomplished in a few hours. Here are the steps:

• Assemble the tools for installation

  The tools needed for the installation of keyless entry systems are screwdrivers, a wire stripper, electrical tape, a drill, and keyless entry system components. Ask the supplier for more installation tools if need be.

• Prepare the vehicle

  To prepare the vehicle for installation, disconnect the vehicle battery, determine where to mount the keyless entry system components, and plan the wire routing.

• Install the keyless entry control module

  To install the keyless entry control module, find a suitable location inside the car, such as under the dashboard, and mount it securely. Then, connect the control module to the car's wiring system following the manufacturer's instructions.

• Install the lock motors

  To install the lock motors, find a suitable location for each door, typically near the door latch, and install them securely. Then, connect the lock motors to the keyless entry control module, ensuring proper wire routing and connections.

• Connect the keyless entry system to the car's wiring

  To connect the keyless entry system to the car's wiring, follow the manufacturer's instructions. Connect the control module to the power supply, ignition, and other essential wires. Then, connect the lock motors to the control module, ensuring correct wire polarity and connections.

• Test the system

  Test the keyless entry system to ensure it works correctly before closing the doors. If it doesn't work, check the wiring and connections.

• Reassemble the doors and connect the battery

  Once the system works, reassemble the doors, including the door panels and window seals. Then, reconnect the vehicle's battery.

Q and A

Q1: Why does my keyless entry not work?

A1: If a keyless entry universal remote car does not work, it could be due to various reasons. The batteries in the remote may need replacement, or there could be interference from other electronic devices. Additionally, the remote might need reprogramming, or there could be a fault in the remote, receiver, or vehicle's central locking system.

Q2: How long does the battery last in a keyless entry remote?

A2: The battery life in a keyless entry remote can vary depending on usage, but it typically lasts one to two years. Regular high use may shorten the battery life, so replacing it every couple of years is advisable to ensure optimal functionality.

Q3: Can I replace the battery in my keyless entry remote?

A3: Yes, replacing the battery in a keyless entry universal remote is usually straightforward and can be done at home. The remote's instruction manual or online guides can help. Generally, it involves opening the remote, removing the old battery, and replacing it with a new one, ensuring it's oriented the right way.

Q4: Does keyless entry drain car battery?

A4: Keyless entry systems use a small amount of energy from the car battery, but they do not significantly drain it. The systems are designed to minimize battery usage. However, if the vehicle's key fob is not functioning properly, it could indicate a more significant battery drain issue, in which case a mechanic should be consulted.

Q5: What should be done if the keyless entry system stops working?

A5: If the keyless entry system stops working, first check if the battery in the remote needs replacement. If the problem persists, there could be an issue with the remote, the vehicle's receiver, or its central locking system. In such cases, it's advisable to consult the vehicle's manual or a professional mechanic to diagnose and fix the problem.