This article I share the guide on how to disable/remove seatbelt chimes warning for Toyota Tundra 2016 by Toyota Techstream TIS software.
Connect interface cable to vehicle OBD port and laptop,then run Techstream software and click to build connection.
It will show you the vehicle information as below,then click “Next” to continue
Then you will access system menu,select “Customize Setting”
Here you select customize function “Warning”
After seconds waiting,you will see below window
Set “Driver Side Seatbelt Warning Buzzer” and “Front Passenger Side Seatbelt Warning Buzzer” from “ON” to “OFF” value,then click right arrow icon to continue
Press Next to make the selected customize changes.