1. Introducción
Gracias por la compraasing the MAIMEIMI Universal Smart Head-Up Display. This device is designed to enhance your driving experience by projecting essential vehicle data directly into your line of sight, reducing the need to look down at your dashboard. It connects via your car's OBD2 interface (for P10/P10-PRO models) or GPS (for Y03 models) and displays various driving parameters such as vehicle speed, engine RPM, water temperature, fuel consumption, and more. This manual provides detailed instructions for installation, operation, and troubleshooting to ensure optimal use of your new HUD.

2. Modelos de productos
This product is available in different models, primarily distinguished by their data acquisition method:
- P10 & P10-PRO: These models are OBD2 speedometers with car diagnostic tools. They connect to your vehicle's On-Board Diagnostics (OBD2) port to retrieve data.
- Y03-KMH & Y03-MPH: These models are GPS speedometers with car diagnostic tools. They are universally compatible with all cars as they rely on GPS signals for speed and other data, powered via USB.

3. Funciones y características principales
- Conectar y usar: Easy installation with the provided OBD cable (P10/P10-PRO) or USB cable (Y03).
- Mostrar: Real 2.6" TFT LCD multi-color smart display for clear visibility.
- Vehicle Protocol Detection: The device automatically detects the vehicle protocol upon first scan.
- Nuevas Funciones: Includes accelerating competitive mode and brake performance test.
- Visualización completa de datos: Shows vehicle speed, engine RPM, water temperature, oil temperature, intake pressure, voltage, instantaneous fuel consumption, average fuel consumption, driving distance measurement, driving time.
- Sistema de alarma: Características de bajo volumentage alarm, high water temperature alarm, over speed alarm, and engine fault code alarm.
- Gestión de códigos de error: Capacidad de eliminar códigos de falla del motor.
- Pantalla personalizable: Multi-function display mode or simple function display mode can be switched freely.
- Cambio de unidad: Freely switch between kilometers (KMH) and miles (MPH).
- Opciones de idioma: English, Simplified Chinese, Traditional Chinese.
- Operación automática: Automatic power on/off with the car.

4. Configuración e instalación
4.1. P10/P10-PRO (OBD) Installation
- Comprobar compatibilidad del vehículo: The OBD smart digital device works with cars that have an OBDII or EU OBD agreement. Open your car's engine hood and look for a sticker that says "OBDII CERTIFIED" (Figure 1). If present, the device can be installed.
- Localizar el puerto OBD2: Find the 16-pin diagnostic link (Figure 2), usually located under the dashboard on the driver's side.
- Conectar dispositivo: Plug the provided OBD cable into the vehicle's OBD2 port and then into the HUD device.
- Sistema de organización de cables: Route the cable discreetly to avoid interference with driving. You can tuck it along the dashboard edges and A-pillar.


4.2. Y03 (GPS) Installation
- Colocación: Place the Y03 GPS HUD on your dashboard in a position that does not obstruct your view del camino.
- Conexión de energía: Connect the provided USB cable to the MINI USB port on the device and then to a USB port in your car or a cigarette lighter car charger port.
- Instalación no destructiva: The Y03 model offers non-destructive installation, simply plug and play.


5. Operación
5.1. Funciones clave
The device features a multi-functional setting button and a light sensor:
- Botón de configuración: This button can be pushed left/right, short-pressed, or long-pressed to navigate and confirm settings.
- Sensor de luz: Ajusta automáticamente el brillo de la pantalla según la luz ambiental.
- Interfaz OBD: (P10/P10-PRO only) Connects to the vehicle's OBD2 port.
5.2. Setting Button Functions
- Short Press (in):
- Cambia el modo de visualización.
- Confirms the menu selection after entering a menu.
- Empujar hacia la izquierda:
- Switches the left area functions.
- Decreases the function setting value after entering a menu.
- Empuje a la derecha:
- Switches the right area functions.
- Increases the function setting value after entering a menu.
- Long Press (in): After entering the menu and finishing settings, long press for 5 seconds to save and exit.
5.3. Function Abbreviations
The display uses abbreviations for various parameters:
- ECT: Temperatura del refrigerante del motor
- RPM: Revoluciones por minuto
- VLT: Volumentage
- FUE: Consumo de combustible
- ODO: Cuentakilómetros
- DES: Distancia de conducción única
- TIMBRE: Single Driving Time
5.4. Multiple Display Modes
The device supports various display modes to suit different driving preferences. You can switch between these modes using the setting button.


5.5. Encendido y apagado automático
The device is designed to automatically turn on when the car starts and turn off when the car is turned off, preventing power theft (for Y03 GPS model) or unnecessary battery drain (for P10/P10-PRO OBD models).

6. Menú de configuración
To enter the setting mode, long press the setting button. Use push left/right to navigate and short press to confirm. Long press to save and exit.
6.1. Configuración general
- Conjunto de idiomas: Choose your preferred language (English, Simplified Chinese, Traditional Chinese).
- Tono de advertencia: Turn the buzzer on or off. Default is on.
- Brillo: Default is 0 (automatic brightness). Values 1-6 allow manual adjustment, with higher numbers indicating stronger brightness.
- Unidad CWT: Set the coolant temperature unit to °C (default) or °F.
- Unidad de velocidad: Set the speed unit to KM (default) or Mile.
- Distancia total: Adjust the total driving distance to match your car's dashboard.
- Hora de apagado: El valor predeterminado es 10 s. Para vehículos con arranque y parada automáticos, configúrelo entre 180 y 240 s.
- Sueño Voltage: If the device doesn't auto-off, adjust this value (e.g., to 13.2V or higher).
- Conjunto de fábrica: Short press to reset to factory defaults.
6.2. Configuración de alarma
- Alarma de velocidad: Default value is 150. The HUD will alarm if speed exceeds this value. Adjust by pushing left (decrease) or right (increase).
- Alarma de refrigerante: Default value is 120°C. The HUD will alarm if coolant temperature exceeds this value.
- Alarma de RPM: Default value is 6000 r/min. The HUD will alarm if engine RPM exceeds this value.
- Alarma BAT: Default value is 10.5V. The HUD will alarm if battery voltage cae por debajo de este valor.
6.3. Calibration Settings
- Ajuste de velocidad: Ajuste la velocidad mostrada para que coincida con el tablero de su auto. El valor predeterminado es 107 %.
- Desplazamiento de velocidad: If the device shows speed (e.g., 5KM/H) when the vehicle is off, adjust the Speed Offset value to match (e.g., set to 5).
- Ajuste de BAT: Si el volumen de la bateríatage displayed differs from the vehicle's actual voltage, it can be adjusted.
- Tamaño del motor: Default is 1.6 L. Adjust this to your car's displacement if fuel consumption readings are inaccurate.
- Ajuste de combustible: Default is 100%. Can be adjusted for more accurate fuel consumption readings.
6.4. Configuración del color de la pantalla
- Cambiar color 1: Adjusts the color of the top display area (e.g., speed).
- Cambiar color 2: Adjusts the color of the left display area.
- Cambiar color 3: Adjusts the color of the right display area.
Note: For color changes, only the open first interface can be modified.


7. Exámenes de conducción
The device offers two driving test modes:
- Prueba de aceleración: Displays speed, distance, and time taken for 400m and 100m acceleration.
- Prueba de freno: Shows speed, brake distance, and time.

8. Flujo de datos
The device can display the entire vehicle data stream, providing deep inspection and diagnosis capabilities. This includes scanning and clearing Diagnostic Trouble Codes (DTCs), viewing frozen frame data, fuel loop status, component tests, O2 sensor monitor tests, ON-Board monitor tests, battery voltage & ignition, and reading vehicle information.


9. Solución de problemas
9.1. Screen Without Display, No Power
- Arrancar el motor del coche.
- Check if the OBD cable line is tightly connected. Try pulling down and re-inserting the OBD cable multiple times to ensure a secure connection.
- Check if the product power switch is turned on.
- If still no display, test the device in another car to determine if the issue is with the device or the car's OBD diagnostic interface. If the car's interface is faulty, repair it.
9.2. Only Shows Car Voltage, Automatic Power Off After 60 Seconds (P10/P10-PRO)
This indicates a compatibility issue. The P10/P10-PRO models are only compatible with cars that have an OBD2 or EU-OBD agreement (generally, cars produced after 2004 for US automakers, and after 2008 for European/Asian automakers). This product does not support JOBD and OBDI protocols. If your car falls outside these specifications, it is recommended to test with another compatible car.
9.3. Inaccurate Speed
- First, ensure the speed unit (KM/H or MPH) is correctly set in the device settings.
- If the speed is still inaccurate, enter the setting menu, navigate to 'Speed Adjust', and adjust the value to match your car's dashboard speed. For example, if your dashboard shows 100 and the device shows 101, adjust the default value to 106%.

9.4. Inaccurate Fuel Consumption
Check your car's engine displacement and set the device's 'Engine Size' parameter accordingly (e.g., if your car is 2.0L, set the device to 2.0L). While fuel consumption can be adjusted, it is generally not recommended as the data is read directly from the car's ECU.
9.5. RPM Alarm
If the RPM alarm is not functioning as expected, refer to the settings menu to adjust the default alarm value (default is 6000 r/min).
9.6. Over Speed Alarm
If the over speed alarm is not functioning as expected, refer to the settings menu to adjust the default alarm value (default is 150 KM/H).
9.7. Device Cannot Auto Power Off
- Speed Display After Vehicle Off: If the device continues to display speed after the vehicle is turned off, switch to the 'Speed Offset' setting and adjust its value to match the speed displayed by the device (e.g., if it shows 5KM/H, set the offset to 5).
- RPM Display After Vehicle Off: If the device continues to display RPM after the vehicle is turned off, switch to the 'Sleep Voltage' setting and adjust the value to 13.2V.
9.8. Auto Start and Stop Cars
For cars with auto start/stop functionality, change the 'Power Off Time' setting to 180-240 seconds to prevent premature shutdown.
9.9. Wrong Operation Leads to Crashes
If the device crashes due to incorrect operation, perform a 'Factory Set' reset.
9.10. Car Dashboard Fault Code Bright (P10/P10-PRO)
Universal OBD devices support multiple communication modes, but each car typically uses only one. If your car's dashboard shows a fault code after connecting the HUD, you may need to adjust the OBD communication protocol by pulling up unneeded pins from the OBD cable using pliers. The device will display the protocol when the vehicle turns on, then unplug and re-plug the OBD cable.
OBD Communication Protocol Exampellos:
- ISO15765 CAN Bus: Keep pins 4, 5, 6, 14, 16. Pull up other pins.
- ISO14230 KWP2000: Keep pins 4, 5, 7, 16. Pull up other pins.
- ISO 9141-2: Keep pins 4, 5, 7, 15, 16. Pull up other pins.
10. Especificaciones técnicas
| Parámetro | Valor |
|---|---|
| Temperatura ambiente | -40°C a +80°C |
| Presión atmosférica | 86-106 kPa |
| Humedad relativa | 10% - 95% |
| Ruido Ambiental | <= 60 dB (A) |
| Nivel de sonido de la alarma | >= 30 dB (A) |
| Vol de trabajotage | 9V ~ 16Vcc (12Vcc / 400mA) |
| Tamaño del producto | 68 * 46 * 73 milímetros |
| Peso del producto | 50 gramos |

11. Consejos para el usuario
- Compruebe la compatibilidad cuidadosamente: Antes de comprarasing, especially for OBD models, verify your car's year and protocol. Older cars (pre-2004 US, pre-2008 EU/Asian) and certain vehicle types (electric, diesel, hybrid, pickup, passenger cars) may not be compatible with OBD models. If unsure, contact the seller with your car's make, model, year, and agreement type.
- GPS Model for Universal Use: If you need a HUD for any car, including those with compatibility issues for OBD models, the Y03 GPS model is a reliable universal option.
- Enrutamiento seguro de cables: When installing the OBD cable, take time to route it neatly and securely along the car's interior to prevent it from interfering with pedals or other controls.
- Adjust Brightness for Optimal View: While automatic brightness is convenient, manually adjust it if you find the display too dim or too bright in specific lighting conditions.
- Utilize Diagnostic Features: For OBD models, regularly check for and clear fault codes to maintain your vehicle's health and prevent minor issues from escalating.
12. Garantía y soporte
For detailed warranty information and customer support, please refer to the official product documentation provided with your purchase. You can also find additional guides and documents, including a user manual in PDF format, by visiting the product page or contacting customer service. The PDF manual can be accessed aquí.
13. Vídeo de demostración del producto
Watch this video for a visual guide on the product's features and in-car operation: