How to solve Launch X431 PRO3S+ Diagnose Tesla Model 3 2020 “Communication Failure”

Problem:

When I used Launch X431 PRO3S+ V5.0 and EV Diagnostic Upgrade Kit to diagnose Tesla Model 3 2020 HV Battery, an error message “communication failure” appeared on the screen. Do I need to open Tesla license?

x431shop.eu engineer replied:

The LAUNCH New Energy Battery Pack Diagnostic Upgrade Kit has included the Tesla software, no need to buy separately. Please check if the cable connection is correct, and follow the prompt to operate again.

• Please check if the vehicle voltage is within a reasonable range, >11 volts.
• Please check if the tablet is running the current software/APK version.
• Please confirm the vehicle ignition state.
• If all the above has been confirmed, please select DIAG FEEDBACK and provide detailed information on the issue. (Select all files associated with this connection)