LAUNCH X431 PRO3S+ Elite FAQs: Troubleshooting & Setup Guide

 LAUNCH X431 PRO3S+ Elite is a professional diagnostic tablet for advanced vehicle repair. This FAQ provides quick solutions for common issues like power saving, ECU communication, and SmartLink Diag setup, helping you maximize the tool’s performance.

• About X431 Diagnostic Tablet

1. How to save power?

(1)Please turn off the screen while the X431 PRO3S+ Elite tool keeps idle.

(2)Set a shorter standby time.

(3)Decrease the brightness of the screen.

(4)If WLAN connection is not required, please turn it off.

2. Communication error with vehicle ECU?

Please confirm:

(1)Whether the VCI device is correctly connected.

(2)Whether ignition switch is ON.

(3)If all checks are normal, send vehicle year, make, model and VIN number to us using Feedback feature.

3. Failed to enter into vehicle ECU system?

Please confirm:

(1)Whether the vehicle is equipped with this system.

(2)Whether the VCI device is correctly connected.

(3)Whether ignition switch is ON.

(4)If all checks are normal, send vehicle year, make, model and VIN number to us using Feedback feature.

4. How to download the diagnostic app after resetting the tablet?

Note: Before registration, please make sure the network is properly connected.

After the X431 PRO3S+ Elite tablet has been successfully reset, follow the steps below to download the App:

• Launch the browser and the default official Launch website opens (If a blank page pops up, just type in x431.com in the input bar).

(2)Tap Login, input the username and password and tap Log In.

(3)Make sure that the serial number is correct, tap APP application program and tap the Download icon to start downloading.

(4)After the download is complete, follow the on-screen instructions to install it.

(5)After installation, use the existing username and password to login and go to update center to download the diagnostic software.

5. What to do if the language of vehicle diagnostic software does not match the system language?

English is the default system language of the X431 PRO3S+ Elite tool. After the system language is set to the preference language, please go to the update center to download the vehicle diagnostic software of the corresponding language.

If the downloaded diagnostic software is still displayed in English, it indicates that the software of the current language is under development.

How to retrieve the login password?

Please follow below steps to proceed in case you forgot the login password:

• Tap the application icon on the home screen to launch it.
• Tap Login on the upper right corner of the screen.
• Tap Retrieve password.
• Input product S/N and follow the on-screen prompts to retrieve the password.

• About SmartLink Diag

What’s network conditions is required for SmartLink Diag?

The remote SmartLink Diag operation requires a network broadband of 100MB or above.

What does the word "Delay" displayed on the SmartLink C screen mean?

The Delay (network delay) indicates the state of the network communication, which can be regarded as a reference since different vehicles require different delays. Different colors represent different delay status. There are three states of network delay:

- Green: Indicates a shorter network delay. In this case, it has a higher success rate of remote communication.

- Yellow: Indicates a medium network delay. In this case, it has a medium success rate of remote communication.

- Red: Indicates a longer network delay. In this case, it has a lower success rate of remote communication and remote ECU reprogramming operations are not suggested.

My network delay is so long?

Please check the following possible reasons:

• The greater distance between the SmartLink B 2.0/SmartLink B and SmartLink C V2.0 dongle causes a longer network delay.
• There are too many network communication nodes that the data communication passes by, which may cause a longer network delay.
• Check if the network is poor and data communication speed is slow.

Some systems of some old vehicles cannot be tested?

The SmartLink C V2.0 dongle supports CAN2.0/CANFD/DoIP communication protocols, but some old vehicle uses K-Line communication protocol.

Is it necessary to re-ignite the car after the diagnostic system starts working?

For the sake of some vehicle’s conditions, the re-ignition will provide you a more detailed analysis after OBD diagnosis.

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