1. Introduction
The MAIMEIMI M13 Head Up Display (HUD) is an innovative automotive accessory designed to enhance driving safety and convenience by projecting essential vehicle data directly onto your car's windshield. This allows drivers to monitor critical information without diverting their eyes from the road.
The M13 HUD supports both OBD2 and GPS systems, offering accurate and real-time display of various parameters including speed, engine RPM, water temperature, voltage, fuel consumption, driving mileage, and more. Its plug-and-play design ensures easy installation and immediate use.
Figure 1: M13 HUD projecting vehicle data onto the windshield.
2. Setup
2.1 Package Contents
Before installation, please ensure all items are present in the package:
- 1 x M13 HUD Unit
- 1 x OBD Cable
- 1 x Non-slip Mat
- 1 x Reflective Film
- 1 x User Manual
Figure 2: M13 HUD package contents.
2.2 Compatibility Check
The M13 HUD operates primarily in OBD2 mode, which is compatible with:
- Gasoline vehicles produced in the United States after 2004 that support the OBD2 protocol.
- Gasoline vehicles produced in other regions after 2008 that support the OBD2 protocol.
To confirm compatibility, check for an "OBD II CERTIFIED" sticker under your car's hood or locate the automobile diagnosis port (OBD port) typically found under the steering wheel.
Figure 3: Checking for OBD2 compatibility and port location.
2.3 Installation Steps
Follow these steps to install your M13 HUD:
- Connect to OBD Socket: Locate your vehicle's OBD2 diagnostic port (usually under the dashboard on the driver's side) and plug in the provided OBD cable.
- Route the Cable: Carefully route the OBD cable along the A-pillar seal or other discreet locations to avoid obstructing your view or interfering with driving.
- Connect to HUD: Connect the other end of the OBD cable to the M13 HUD unit.
- Position the HUD: Place the HUD unit on your dashboard in a position that allows for clear projection onto the windshield without blocking your view of the road. Use the non-slip mat to secure the device.
- Apply Reflective Film (Optional but Recommended): For optimal clarity and to eliminate ghosting, apply the included reflective film to the windshield where the HUD projects. Clean the windshield thoroughly before application.
Figure 4: Visual guide for HUD installation.
3. Operating Instructions
The M13 HUD offers a variety of functions and display modes to suit your preferences. The device features independent buttons for settings and mode switching.
3.1 Core Functions
The M13 HUD can display the following information:
- Speed (KM/H or MPH)
- Engine RPM
- Water Temperature
- Voltage
- Driving Mileage
- Fuel Consumption (instantaneous and average)
- Automatic Light Adjustment
- Clear Fault Code
- Alarm Sound Switch
- Automatic Power On/Off
Figure 5: Overview of M13 HUD core functions.
3.2 Display Modes
The M13 HUD offers 16 different interface displays. You can manually switch between these modes using the independent buttons to show your preferred driving data. Examples include:
- Mode 1: Speed/RPM icon/Decoration icon
- Mode 2: Speed/Decoration icon
- Mode 3: Speed/RPM icon
- Mode 4: Speed
- Mode 5-8: Various combinations of Water temperature/RPM/Decoration icons
- Mode 9-12: Various combinations of Voltage/RPM/Decoration icons
- Mode 13-16: Various combinations of Fuel consumption/RPM/Decoration icons
Figure 6: Examples of the 16 available display interfaces.
3.3 Fuel Consumption Modes
The HUD provides three distinct fuel consumption display modes:
- Idle Mode (before driving): When the ignition is on and the vehicle is idling, the HUD displays the instantaneous fuel consumption (L/H).
- Cruise Mode (during driving): While the vehicle is running, the HUD shows the instant fuel consumption per 100 kilometers (L/100km).
- Average Fuel Consumption (after driving): After the car is turned off, the HUD displays the average fuel consumption for that driving session (L/100km).
Figure 7: Different fuel consumption display modes.
3.4 Alarm Functions
The M13 HUD includes several user-friendly alarm settings to enhance driving safety:
- Over-speed Alarm: Alerts you when exceeding a set speed limit.
- Engine RPM Alarm: Notifies you if engine RPM goes too high.
- Voltage Alarm: Warns of abnormal vehicle voltage levels.
- Water Temperature Alarm: Alerts to high engine water temperature.
- Fatigue Driving Reminder: Prompts you to take a break after prolonged driving.
Figure 8: User-friendly alarm settings.
3.5 Button Functions
The HUD unit features several buttons for navigation and settings:
- Setting button (M): Used to enter the settings menu and confirm selections.
- "-" button: Decreases values or navigates left/down in menus.
- "+" button: Increases values or navigates right/up in menus.
- Power button: Turns the device on/off.
Figure 9: Integrated button design and USB ports.
3.6 Automatic Light Adjustment
The M13 HUD features an automatic brightness adjustment function. It uses a photosensitive component to detect ambient light and adjust the display brightness accordingly, ensuring optimal visibility day or night without dazzling the driver.
Figure 10: Automatic light adjustment in various conditions.
3.7 Software and Hardware Upgrades
The M13 HUD incorporates advanced software and hardware for improved performance:
- Software Upgrade: Features a speed lubrication effect for a more natural and smooth display, eliminating speed lag. It also offers increased compatibility for starting, stopping, hybrid, and gasoline vehicles.
- Hardware Upgrade: Reduced standby current to approximately 0.002mAh for enhanced power saving. The device utilizes STM32 imported chips for stable and powerful performance.
Figure 11: Hardware upgrade for power efficiency.
Figure 12: STM32 imported chips for stable performance.
4. Maintenance
To ensure the longevity and optimal performance of your M13 HUD, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to gently wipe the HUD unit and the reflective film. Avoid using abrasive cleaners or solvents that could damage the surfaces.
- Temperature: The HUD is designed with PC material for high and low temperature resistance, allowing it to operate normally in temperatures ranging from -40°C to +80°C. However, extreme prolonged exposure to direct sunlight or freezing temperatures should be avoided when possible.
- Cable Care: Ensure the OBD cable is not pinched or excessively bent, as this can damage the wiring.
Figure 13: M13 HUD's temperature resistance.
5. Troubleshooting
If you encounter any issues with your M13 HUD, please refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| HUD does not power on or display anything. | Loose OBD connection, vehicle not compatible, or power issue. | Ensure the OBD cable is securely plugged into both the vehicle's port and the HUD. Verify vehicle compatibility (OBD2 protocol). Check vehicle's ignition status. |
| Inaccurate speed display. | Speed calibration needed. | Access the HUD's settings menu to adjust the speed calibration factor according to your vehicle's actual speed (e.g., using GPS on your phone for comparison). |
| Double image or ghosting on the windshield. | Windshield reflection without reflective film. | Apply the provided reflective film to the windshield where the HUD projects. Ensure the film is applied smoothly without air bubbles. |
| HUD does not turn off with the car. | Vehicle's OBD port provides constant power. | Some vehicles provide continuous power to the OBD port. You may need to manually turn off the HUD using its power button or unplug it if not in use for extended periods. Alternatively, check HUD settings for an auto-off delay. |
| Alarms are too loud or too quiet. | Alarm volume not set correctly. | Use the HUD's settings menu to adjust the alarm volume to your preferred level. |
6. Specifications
Detailed technical specifications for the M13 HUD:
| Parameter | Value |
|---|---|
| Product Name | M13-HUD |
| Product Color | Black |
| Imaging Screen | LED display |
| Product Weight | 60g |
| Stand-by Current | ~0.002mAh |
| Environment Temperature | -40°C ~ +80°C |
| Atmospheric Pressure | 86-106KPa |
| Environmental Noise | <=60dB(A) |
| Operating Voltage | 11V~16Vdc (12Vdc/400mA) |
| Product Size | 90mm x 55mm x 30mm |
| Speed Type | OBD vehicle speed, GPS speed |
| Wire or Wireless | Wired |
| Speed Unit | KMH, MPH |
Figure 14: M13 HUD product parameters and dimensions.
7. User Tips
To get the most out of your M13 HUD, consider these helpful tips:
- Optimal Placement: Experiment with different dashboard positions to find the spot that provides the clearest and least distracting projection for your driving posture.
- Reflective Film: Always use the reflective film for the best display quality, especially in bright conditions, to prevent double images and ensure crisp visuals.
- Alarm Customization: Take time to set up the over-speed, RPM, voltage, and water temperature alarms according to your vehicle's specifications and personal safety preferences. This can significantly enhance driving awareness.
- Brightness Adjustment: While the HUD has automatic light adjustment, you can manually fine-tune it if you find the default setting too bright or dim for specific lighting conditions.
- Cable Management: Securely tuck away the OBD cable to prevent it from interfering with your driving or becoming a visual distraction.
8. Warranty and Support
For any warranty claims, technical support, or further assistance with your M13 HUD, please contact the seller or manufacturer directly. Keep your purchase receipt or order details handy as proof of purchase.
