How to Program a Key Using VXDIAG Car obd2 diagnostic tool for Toyota?

In modern vehicles, smart keys have become a convenient accessory, especially for owners who frequently go camping or travel, as having a backup key is important. This article will explain how to use the VXDIAG Car obd2 diagnostic tool for Toyota device, along with the Techstream software, to program a smart key, enabling car owners to do it themselves and avoid high dealer fees.

1. Preparation

Before you can program a smart key with the VXDIAG Plus for Toyota device, you will need some hardware and software:

1. VXDIAG Plus for Toyota Device: This is a diagnostic tool designed specifically for Toyota and Lexus vehicles, supporting various vehicle control systems for diagnostics and programming functions. Compared to other diagnostic tools, VXDIAG Plus is highly compatible, relatively affordable, and packed with features, making it an ideal choice for car owners who want to perform DIY diagnostics and programming.

2. Techstream Software: Techstream is Toyota's official diagnostic and programming software, which is compatible with the VXDIAG Plus device. With it, you can adjust various vehicle settings, including key programming. Unlike many other devices that require additional configurations or complex interfaces, VXDIAG Plus connects quickly with Techstream software, simplifying the process.

3. Virgin Smart Key: This is a new, unprogrammed key that can typically be purchased from third-party stores. This key needs to be programmed before it can match your vehicle.

4. Compatible Computer System: Ensure your computer is running a compatible version of Techstream software, usually requiring a Windows operating system.

2. Connection and Setup

1. Connect VXDIAG Plus: Connect the VXDIAG Plus diagnostic device to the vehicle through the OBD-II interface, ensuring a stable connection. Compared to other devices, VXDIAG Plus offers higher compatibility and stability, allowing for efficient communication with the electronic systems of a wide range of Toyota models.

2. Install and Launch Techstream: Start the Techstream software on your computer and connect it to the vehicle’s diagnostic interface, ensuring the software successfully recognizes the vehicle.

3. Select Key Programming Function: In the Techstream software, find the "Smart Key Programming" option, typically located under the "Security System" or "Key Management" section. 

3. Programming Steps

1. Place the Programmed Key: During the programming process, first place the already programmed key near the vehicle's start button so that the vehicle can recognize and read its RFID chip.

2. Add New Virgin Key: Place the unprogrammed smart key near the start button. The system will communicate with it via Bluetooth or RFID and emit two short beeps, indicating that the new key has been successfully recognized.

3. Verify Key Programming: Once completed, the system will indicate that programming was successful. You can remove all keys, turn off the engine, and then use the new key to lock and unlock the doors to ensure that the key is functioning properly.

4. Multi-Key Management: If you have multiple keys (for example, two original keys and one new key), you do not need to delete the previously programmed keys. Just follow the steps to add the new key, and the system will allow you to use multiple keys at the same time.

4. Troubleshooting During Programming

1. New Key Not Recognized Immediately After Programming: If the new key is not recognized right away, try removing all keys, turning off the engine, and then using the new key to lock and unlock the doors. This may help the vehicle to recognize the new key.

2. Remote Window Control Issue: During programming, you may notice that the new key can open the windows but cannot close them. This is likely because the manufacturer has restricted remote window closing for safety reasons, to prevent accidents such as pinching someone in the window.

3. Different Key Types: Note that smart keys are different from regular keyless entry keys, and the programming process for the latter may vary, involving different security mechanisms and procedures.

5. Post-Programming Tasks

1. Key Blade Cutting: Although the primary function of the smart key is to operate wirelessly, you may still need the key blade for emergency use. Many car owners opt to have the key blade cut after programming, ensuring that they can unlock the vehicle manually in case of a dead key battery or electronic malfunction. Based on forum experiences, traditional key cutting methods can be expensive, but some third-party vendors may offer more reasonable prices.

2. Save Programming Records: After each successful programming, be sure to save the programming records for future reference or management.

6. Conclusion

By using the VXDIAG Plus for Toyota device along with Techstream software, car owners can program their smart keys at home or in the garage. With VXDIAG Plus offering strong compatibility, ease of use, and efficient programming capabilities, it is undoubtedly an ideal choice for key programming. The process is relatively simple, and as long as you follow the steps and ensure proper connection, you can avoid unnecessary fees and gain more control over your vehicle. For those who frequently need backup keys, this DIY programming method is highly practical, convenient, and cost-effective.

If you encounter any difficulties during programming or are unsure about certain steps, it’s recommended to refer to the help documents within the Techstream software or seek advice from other car owners to ensure proper execution.