1. Product Overview
The MAIMEIMI P16 Car HUD (Head-Up Display) OBD2 LCD Meter is designed to enhance your driving experience by displaying crucial vehicle data directly in your line of sight. This device connects to your car's OBD2 interface via a cable, presenting information such as vehicle speed, engine RPM, water temperature, fuel consumption, and voltage. By keeping your eyes on the road, it helps prevent distractions caused by looking down at the dashboard. The P16 does not alter any car ECU data.
Figure 1: MAIMEIMI P16 Car HUD displaying key driving data.
2. Compatibility and Important Notes
Please read the following compatibility information carefully before installation:
- Vehicles before 2008: This HUD is NOT compatible with cars manufactured before the year 2008 (including 2008).
- Diesel Engines: This HUD is NOT compatible with diesel engine vehicles.
- Specific Incompatible Models:
- American models: Not for Dodge, JEEP, Sail, Chrysler (models produced before 2004 and 2004).
- French and Italian models: Not for Fiat, Maserati, Lamborghini, DS, Peugeot, Citroen, Renault, Simka, Amirca.
- Japanese models: Not for Suzuki, Mazda 6, Infiniti (QX50, Q50, Q501), 2013 Toyota Avanza, Lexus (IS250, EX250, ES300H), Honda (Jazz, CRV), and cars produced before 2008.
- South Korean models: Some models of Kia and Hyundai (e.g., 2013 Hyundai Sonata, 2017 Kia Soul PS).
- Other: Petrol-electric hybrid and diesel vehicles, pickup trucks, RVs, cars modified with car computers, all brand models under Swiss Volvo, Chrysler Group, and Fiat Group.
- This product is only compatible with cars using the OBD2 protocol and EU-OBD protocol (European region: produced after 2003; Other regions: produced after 2007). It does not support JOBD and OBDI.
3. Package Contents
The MAIMEIMI P16 Car HUD package includes the following items:
- 1 x P16 HUD Unit
- 1 x Rotating Bracket
- 1 x OBD Interface Cable
- 1 x English Manual
- 1 x Non-slip Mat
Figure 2: Package contents of the P16 Car HUD.
4. Installation
The P16 HUD is designed for easy plug-and-play installation.
- Place the non-slip mat on your car's dashboard in a suitable position.
- Attach the HUD unit to the rotating bracket and place it on the non-slip mat. The 360° rotating suction cup mount allows you to adjust the visual angle and height for optimal viewing.
- Locate your vehicle's OBD2 port (usually under the dashboard on the driver's side).
- Connect the provided OBD interface cable to the HUD unit and then to your car's OBD2 port.
- Ensure the product power switch is turned on (if applicable).
- Start your car engine to power on the HUD.
Figure 3: Multiple installation options for the P16 HUD.
Figure 4: P16 HUD physical features and dimensions.
5. Operating Instructions
5.1 Key Functions (Setting Button)
The device is primarily controlled using a single setting button, which can be pushed left/right or pressed short/long.
- Short press in:
- Switches the display mode.
- Confirms menu selections when in menu mode.
- Push left:
- Switches the left area functions on the display.
- Decreases values or changes settings when in menu mode.
- Push right:
- Switches the right area functions on the display.
- Increases values or changes settings when in menu mode.
- Long press in (5 seconds): Enters or exits the setting menu, saving changes upon exit.
Figure 5: Multiple function display with switchable data.
5.2 Function Abbreviations
The display uses the following abbreviations for various parameters:
- ECT: Engine Coolant Temperature
- VLT: Voltage
- FUE: Fuel Consumption
- RPM: Revolutions Per Minute
- ODO: Odometer
- TIM: Driving Time
- DIS: Driving Distance
- MAP: Intake Pressure
- OIT: Oil Temperature
- A/F: Air-Fuel Ratio
- TCP: Turbine Pressure
Figure 6: Comprehensive list of HUD core functions.
5.3 Setting Mode (Menu Mode)
To enter the setting mode, long press the setting button. Push right/left to navigate through the menu options, and short press to confirm a selection. Long press for 5 seconds to save changes and exit.
Figure 7: Multi-language and setting menu options.
Adjustable Settings:
- Language Set: Choose between English, Simplified Chinese, or Traditional Chinese.
- Sound Switch: Turn the buzzer sound on or off.
- Speed Alarm: Set the overspeed alarm threshold (default: 150).
- Coolant Alarm: Set the high water temperature alarm threshold (default: 120°C).
- RPM Alarm: Set the over-RPM alarm threshold (default: 6000 r).
- BAT Alarm: Set the low battery voltage alarm threshold (default: 10.5V).
- Speed Adjust: Calibrate the displayed speed with your car's dashboard (default: 107%).
- Speed Offset: Adjust if the device shows a non-zero speed when the vehicle is off.
- BAT Adjust: Calibrate if the displayed battery voltage differs from the vehicle's actual voltage.
- Engine Size: Set to match your car's displacement for accurate fuel consumption (default: 1.6 L).
- Fuel Consumption Adjust: Fine-tune fuel consumption display (default: 100%).
- Change Color 1/2/3: Customize the colors of different display areas.
- Brightness: Set to AUTO (automatic sensitivity) or manually adjust from 1-6.
- CWT Unit: Switch coolant temperature unit between °C and ℉.
- Speed Unit: Switch speed unit between KM/H and MPH.
- Sum Distance: Manually set the total driving distance to match your dashboard.
- Power Off Time: Adjust the delay before the device powers off (default: 10s; for auto start/stop cars, set to 180-240s).
- Sleep Voltage: Adjust if the device doesn't auto-off (set to 13.2V or higher).
- Factory Set: Reset all settings to factory defaults.
5.4 Driving Tests
The P16 HUD includes performance testing features:
- Speedup Test: Displays current speed, distance traveled, time for 400m, and time to reach 100 KM/H.
- Brake Test: Displays current speed, braking distance, and braking time.
Figure 8: Acceleration Test display.
Figure 9: Brake Test display.
5.5 Error Code Management
- Scan DTCs: Scans the ECU for error codes and displays their details.
- Clean DTCs: Clears detected error codes from the ECU.
Figure 10: PID List for full vehicle data information.
Figure 11: Full vehicle data scan and diagnostic tests.
5.6 Data Stream
This function displays all available vehicle data streams from the ECU.
5.7 Various Alarm Functions
The P16 HUD provides visual and audible alerts for critical driving conditions:
- Overspeed alarm
- RPM alarm
- Voltage alarm
- Water temperature alarm
- Malfunction indicator (engine fault code alarm)
Figure 12: Various alarm functions displayed on the HUD.
5.8 Display Themes
The P16 HUD offers multiple interface display themes and customizable functions:
- Instrumentation Theme
- Red Theme
- Racing Theme
- Blue Theme
- Competition Mode
- Sports Mode
Figure 13: New interface display designs and themes.
5.9 Product Video
Video 1: Demonstration of the MAIMEIMI P16 Car HUD in action, showing various display modes and functions while driving.
6. Troubleshooting
If you encounter any issues with your P16 HUD, refer to the following troubleshooting guide:
-
Screen without display, no power:
- Start the car engine.
- Check if the OBD cable is securely connected. Try pulling down and re-inserting the OBD cable multiple times.
- Ensure the product power switch is on.
- If still no display, test the HUD in another car to determine if the issue is with the device or the car's OBD diagnostic interface. Repair the car's interface if necessary.
-
Only shows car voltage and auto-powers off after 30 seconds:
- This product is only compatible with OBD2 and EU-OBD protocol cars (European region: produced after 2003; Other regions: produced after 2007).
- It does not support JOBD and OBDI. Test with another compatible car.
-
Device is stuck or crashes during driving:
- Check if other OBD devices are connected to the same interface. Remove them and perform a factory reset on the P16.
- If the issue persists, try the device in another car.
-
Inaccurate Speed:
- Verify the speed unit (KM/H or MPH) is correctly set in the settings menu.
- Adjust the "Speed Adjust" option in the settings menu to match your car's dashboard speed. For example, if the dashboard shows 100 and the HUD shows 101, adjust the default value to 106%.
-
Inaccurate Fuel Consumption:
- Set the "Engine Size" in the settings menu to match your car's displacement (e.g., 2.0L for a 2.0L engine).
- While fuel consumption can be adjusted, it's generally not recommended as data is read directly from the ECU.
-
RPM Alarm / Over Speed Alarm:
- Adjust the "RPM Alarm" or "Speed Alarm" values in the settings menu to your desired thresholds.
-
Device does not auto-power off:
- If the device displays speed after the vehicle turns off, adjust the "Speed Offset" value to match the displayed speed (e.g., if it shows 5 KM/H, set offset to 5 KM/H).
- If the device displays RPM after the vehicle turns off, adjust the "Sleep Voltage" setting to 13.2V or higher.
-
Auto start/stop cars:
- Change the "Power Off Time" setting to 180-240 seconds.
-
Wrong operation leads to crashes:
- Perform a factory reset.
-
Car dashboard fault code brightens:
- Universal OBD devices support multiple communication modes, but each car typically supports only one. If this occurs, you may need to identify the correct protocol for your car and, if necessary, use pliers to remove unneeded pins from the OBD cable. (When the vehicle turns on, unplug and re-plug the OBD cable; it will display the protocol).
Warning: If you do not use the HUD for a long time, please unplug the cable.
7. Specifications
| Feature | Description |
|---|---|
| Model | P16 |
| Display Type | TFT LCD Multi-color Smart Display |
| Connectivity | OBD2 Interface (wired) |
| Compatibility | OBD2 and EU-OBD protocol cars (post-2003 EU, post-2007 other regions) |
| Incompatible Vehicles | Cars before 2008, Diesel engines, specific American, French, Italian, Japanese, Korean models (see Section 2) |
| Displayable Data | Vehicle speed, engine RPM, water temperature, voltage, instantaneous/average fuel consumption, total/single driving distance & time, turbo pressure, oil temperature, air-fuel ratio, etc. |
| Alarm Functions | Low voltage, high water temperature, over speed, engine fault code, RPM alarm |
| Special Features | Accelerating competitive mode, Brake performance test, Fault code elimination, Multi-language support, Customizable display themes |
| Dimensions (approx.) | 83mm (3.27in) width x 54mm (2.12in) height x 15mm (0.59in) depth (slim body 6mm) |
| Weight (approx.) | 0.18 kg (Product Package Weight) |
8. User Tips
- Initial Setup: After connecting, allow the device a moment to scan and connect to your car's ECU. If it only shows voltage, double-check your car's compatibility with OBD2 protocols.
- Speed Calibration: If the speed displayed on the HUD doesn't perfectly match your car's dashboard, use the "Speed Adjust" setting to fine-tune it for accuracy.
- Auto Start/Stop Vehicles: For cars with auto start/stop features, adjust the "Power Off Time" to a longer duration (180-240 seconds) to prevent the HUD from cycling off and on frequently.
- Persistent Fault Codes: If your car's dashboard fault light comes on after connecting the HUD, it might be due to protocol conflicts. Try unplugging and re-plugging the OBD cable while the car is on to see the detected protocol, and consult the manual for advanced troubleshooting regarding pin removal if necessary.
- Display Customization: Experiment with the different display themes and color options to find the most comfortable and informative layout for your driving style.
9. Support
For further assistance or inquiries, please contact MAIMEIMI Instruments Store directly. Ensure you have your product model (P16) and any relevant vehicle information ready.
