How to install OBU?
3 Answers
OBU is installed by directly attaching it to the small black dots at the top of the front windshield. OBU is a microwave device that uses DSRC technology to communicate with RSU. The function of OBU is to use DSRC technology to establish a microwave communication link with RSU, enabling vehicle identification and electronic toll collection without stopping the vehicle, thus creating an unattended vehicle passage. OBU consists of two parts: the host and peripherals. The host includes motherboard components, video components, differential GPS components, GPRS module, WLAN card, power supply, amplifier, heat sink, casing, and wiring harness. The peripherals include keyboard, LCD display, in-vehicle LED, external LED, GPS antenna, GPRS antenna, dashcam, passenger counter, and other expansion devices.
I just installed an OBU by myself recently and want to share some tips. First, find a good spot – usually right in the center on the inside of the windshield for the strongest signal reception. Don’t forget to clean the glass surface thoroughly, or the adhesive might not hold. Then, use the double-sided tape that comes with the device to secure the OBU box, but don’t press too hard. Next, connect the power – most OBUs plug directly into the cigarette lighter or connect to the car battery, but I used a wireless model, which was even easier. After installation, power it on and test the signal to ensure it’s recognized automatically at toll stations. The whole process isn’t complicated, just prepare some basic tools, but if the adhesive is misaligned, it could affect the ETC function. It took me about 20 minutes to finish, saving the cost of going to a 4S shop. Remember, read the manual or watch online tutorials before installation to avoid mistakes that could make removal troublesome.
After years of working in automotive maintenance, I've learned that OBU installation hinges on professional techniques. Locating the correct mounting point is step one – typically near the rearview mirror on the windshield, avoiding shaded dots to prevent interference. Essential tools include adhesive tape and cleaner to ensure dust-free surfaces for proper bonding. Power connection requires caution: for hardwired types, access the fuse box to connect to a stable circuit, preventing short circuits that could damage other components. Use a dedicated scanner to verify proper response to toll station signals during testing. Common issues stem from poor adhesive quality or misalignment causing malfunction, so OEM materials are recommended. To save time, professional shop installation is advised to avoid rework.
