1. Introduction
The wiiyii M4 Heads-Up Display (HUD) is an OBD2 system speedometer designed to project essential driving data onto your vehicle's windshield. This technology aims to enhance driving safety by allowing drivers to view information such as vehicle speed, water temperature, and voltage without diverting their gaze from the road.
The M4 HUD features a high-brightness LED display with an integrated light-sensing sensor for automatic brightness adjustment, ensuring clear visibility in various lighting conditions. It also includes multiple alarm functions for overspeed, water temperature, voltage, and fatigue driving.
Figure 1.1: The M4 HUD displaying vehicle speed on the windshield.
2. What's in the Box
Upon unboxing your wiiyii M4 HUD, you should find the following components:
- M4-HUD Unit
- Reflective Film
- User Manual (Instructions)
- OBD Line
- Non-slip Mat
Figure 2.1: Included accessories for the wiiyii M4 Heads-Up Display.
3. Installation Guide
The wiiyii M4 HUD is designed for simple plug-and-play installation. Follow these steps to set up your device:
- Locate the OBD Socket: Identify your vehicle's OBD2 diagnostic port, typically located under the dashboard on the driver's side.
- Connect the OBD Line: Insert one end of the provided OBD line into the vehicle's OBD2 socket.
- Route the Cable: Carefully route the OBD line along the A-pillar sealing strip or other discreet locations to avoid obstructing your view or vehicle controls.
- Connect to HUD: Connect the other end of the OBD line to the M4 HUD unit.
- Position the HUD: Place the HUD unit on your dashboard in a suitable position where the projected display is clearly visible on the windshield without obstructing your view of the road. Use the non-slip mat to secure the device.
- Apply Reflective Film (Optional): If the projection on your windshield is not clear enough, apply the reflective film to the windshield where the HUD projects. Ensure the area is clean before application.
Figure 3.1: Visual guide for the plug-and-play installation of the M4 HUD.
Figure 3.2: Detailed steps for connecting the M4 HUD to your vehicle's OBD port.
4. Operating Instructions
The M4 HUD automatically powers on and off with your vehicle's ignition. It displays various driving parameters and offers customizable settings.
4.1 Display Functions
The HUD can display the following information:
- Vehicle Speed (Km/h or MPH)
- Water Temperature (°C or °F)
- Voltage (V)
- Single Driving Mileage (displayed when ignition is turned off)
Figure 4.1: One-click switching between water temperature, speed, and voltage displays.
Figure 4.2: Distance traveled display after ignition is off.
4.2 Unit Switching
The speed unit can be switched between kilometers per hour (Km/h) and miles per hour (MPH). The water temperature unit can be switched between Celsius (°C) and Fahrenheit (°F). Refer to the included user manual for specific instructions on how to access and change these settings.
4.3 Automatic Light Sensing
The M4 HUD is equipped with a built-in light-sensing sensor that automatically adjusts the display brightness according to ambient light conditions. This ensures optimal visibility during both day and night driving. If preferred, you can manually adjust the brightness through the device settings.
Figure 4.3: Adaptive sensitivity ensures clear display in varying light.
5. Safety Features and Alarms
The M4 HUD incorporates several alarm functions to alert drivers to potential issues:
- Overspeed Alarm: Alerts you when your vehicle exceeds a preset speed limit.
- Water Temperature Alarm: Notifies you if the engine's water temperature rises above a safe threshold.
- Voltage Alarm: Warns you about abnormal vehicle voltage levels.
- Fatigue Driving Reminder: Prompts you to take a break if you have been driving continuously for an extended period (e.g., 4 hours).
- Fault Alarm: Indicates detected vehicle system faults.
Figure 5.1: Overview of M4 HUD alarm functions.
Figure 5.2: Visual representation of the overspeed alarm function.
Figure 5.3: The fatigue driving reminder promotes safe driving habits.
6. Compatibility
The wiiyii M4 HUD is an OBD2 system speedometer. It is generally suitable for most vehicles manufactured after 2009 that are equipped with an OBD2 port. However, it is important to note that OBD2 speedometers are typically not compatible with:
- Electric Vehicles (EVs)
- Diesel Vehicles
- Pickup Trucks
- RVs (Recreational Vehicles)
- Vehicles with computer modifications
If you are unsure about your vehicle's compatibility, please consult your vehicle's manual or contact wiiyii customer support before use.
7. Troubleshooting
This section addresses common issues you might encounter with your M4 HUD.
7.1 Display Not Turning On
- Ensure the OBD cable is securely connected to both the HUD unit and the vehicle's OBD2 port.
- Verify that your vehicle's ignition is on. The HUD powers on automatically with the ignition.
- Check if your vehicle is compatible with OBD2 systems (refer to Section 6).
7.2 Inaccurate Speed Reading
- The HUD may require calibration. Refer to the detailed settings in the included user manual to adjust the speed offset.
- Ensure the correct speed unit (Km/h or MPH) is selected.
7.3 Display Too Dim or Too Bright
- The HUD has an automatic light-sensing feature. If you prefer manual control, access the settings menu to adjust brightness levels.
- Ensure the reflective film is correctly applied if used, as it can affect perceived brightness.
7.4 Alarms Not Functioning
- Check the HUD settings to ensure alarm thresholds are correctly configured and enabled.
- If a fault alarm persists, consult a professional mechanic for vehicle diagnostics.
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | M4 |
| Brand | wiiyii |
| Product Dimensions | 3.5 x 1.77 x 0.55 inches (9.0 x 4.5 x 1.4 cm) |
| Item Weight | 2.4 ounces (0.15 Pounds) |
| Material | Plastic |
| Display Type | High-brightness LED |
| Connectivity | OBD2 |
| Special Features | Automatic light sensing, Overspeed alarm, Water temperature alarm, Voltage alarm, Fatigue driving reminder, Fault alarm |
Figure 8.1: Product dimensions and accessories.
9. Warranty and Support
wiiyii provides a 12-month warranty for the M4 HUD. For any installation or setup issues, or to inquire about compatibility, please contact wiiyii customer service. They offer 24-hour after-sales support to assist you.
Contact information for support is typically found on the product packaging or the official wiiyii website.