ETC tag expiration is a common issue, primarily caused by users privately removing or relocating the OBU device, or due to the ETC electronic tag becoming loose and detached. Since ETC is vehicle-specific and has a protective interlock during installation, there is a push-button switch on the side that adheres to the car's front windshield. If this button is triggered twice consecutively, it will cause the ETC electronic tag to fail. The ETC installation process is as follows: Upon receiving the device, first check if the ETC card and electronic tag (OBU) are damaged. Press the anti-tamper button on the back of the OBU. A red light will briefly illuminate, and the OLED screen will display "Tag Invalid" or "Please Insert Card," indicating the device is functioning normally. Clean the front windshield to ensure the surface is smooth, clean, and dry. Then peel off the adhesive backing of the OBU and attach it to the installation position. Press firmly for 2-3 minutes to remove any air bubbles. Insert the ETC card with the front side facing the driver and the back side facing the windshield, ensuring the chip is inserted into the OBU device. ETC activation method: Insert and remove the ETC card twice consecutively until the electronic tag screen displays "Bluetooth On." If "Tag Invalid" appears after inserting and removing the card twice without attaching the electronic tag, this is normal and does not affect activation. Alternatively, press the button on top of the electronic tag to enable Bluetooth. Turn on your phone's Bluetooth and open the corresponding mobile app (usually with a download QR code on the electronic tag). Navigate to the device activation interface. Click "Connect Device" and wait patiently for the "Connection Successful" prompt. Once connected, upload a photo of the vehicle's front to complete activation.
