1. Introduction
The RYSJM C3 OBD2 HUD (Head Up Display) is an advanced automotive accessory designed to project essential driving information directly onto your car's windshield, enhancing safety and convenience. This device features a large, clear screen with no ghosting, offering multiple customizable interfaces. It operates on a dual system (OBD+GPS) for broad compatibility and accurate data display. The C3 HUD is powered by a high-performance processing chip, ensuring smooth operation and real-time data updates.
This manual provides detailed instructions for the installation, operation, maintenance, and troubleshooting of your C3 HUD. Please read it thoroughly before use to ensure proper functionality and to maximize your driving experience.
Figure 1: C3 Smart Edition HUD with OBD+GPS Dual System
2. Product Variants
The C3 HUD is available in two main configurations:
- C3 HUD (OBD+GPS): Standard model with core features.
- C3 HUD (OBD+GPS) With Live Navigation (C3 Plus Navigation): Includes additional navigation features, capable of displaying driving directions.
Please verify your model before proceeding with specific instructions.
3. Specifications
3.1 General
- Brand Name: RYSJM
- Material: ABS
- Origin: Mainland China
- Rated Power: OBD2 +GPS
- Output Frequency: 0
- High-concerned chemical: None
3.2 Dimensions & Weight
Figure 2: Product Dimensions
- Size Name: 11*8*5cm (approximate)
- Package Length: 11 cm
- Package Width: 6 cm
- Package Height: 10 cm
- Package Weight: 2.0 kg
3.3 Operating Conditions
- OBD Mode Working Voltage: 11V~18VDC (12VDC/200mA). If voltage is higher than 24V, use a USB cable for GPS mode.
3.4 Display Features
- HD LCD Display with optical imaging for no double image.
- Built-in display diaphragm for no ghosting, stereo imaging.
- Automatic photo-sensitivity with 18 levels of brightness adjustment.
- Supports multiple interface colors (over 100 small interfaces).
3.5 Data Displayed (OBD2 Mode)
- Speed
- RPM (Revolutions Per Minute)
- Water Temperature (ECT - Engine Coolant Temperature)
- Battery Voltage (VLT)
- Clock (RTC - Real-Time Clock)
- Driving Time (TIM)
- Driving Distance (DIS)
- Fuel Consumption
- Altitude (ALS)
- Satellite Numbers
- Turbine Pressure (TCP)
- Air-Fuel Ratio (A/F)
- Intake Pressure (MAP)
- KM/H (Kilometers per hour)
- MPH (Miles per hour)
- Data Stream
3.6 Data Displayed (GPS Mode)
- Speed
- Driving Time
- Driving Distance
- Satellite Numbers
- Data Stream
- Compass (DIR - driving direction)
- Latitude/Longitude
3.7 Alarms & Reminders
- Speed Alarm
- RPM Alarm
- Water Temperature Alarm
- Voltage Alarm
- DTCS Alarm (Diagnostic Trouble Code System)
- Fatigue Driving Reminder
- Overspeed Warning (Speed color changes: 0-99 White, 100-119 Yellow for reminder, 120+ Red for alarm)
4. Package Contents
Figure 3: Included Accessories
Your RYSJM C3 HUD package should contain the following items:
- 1 x C3 Head Up Display Unit
- 1 x OBD Cable
- 1 x Cigarette Lighter Cable (for GPS mode or vehicles with >24V)
- 1 x English Manual
- 1 x Cleaning Cloth
5. Installation
Follow these steps to install your C3 HUD:
- Connect Power: Locate your vehicle's OBD socket connector (usually under the dashboard on the driver's side) or use the cigarette lighter connection. Plug the appropriate cable into the power source.
- Route Cable: Carefully route the cable along the A-pillar seal to conceal it and prevent interference with driving.
- Position HUD: Connect the other end of the cable to the HUD unit. Place the HUD unit on your dashboard in a position that provides a clear view of the projected display without obstructing your view of the road. The adjustable angle design allows you to fine-tune the viewing angle for comfort.
Figure 4: Installation Steps
Video 1: Product demonstration and installation overview.
The device features an automatic on/off switch, activating as the car starts and stopping when the car is turned off.
6. Operation
6.1 Basic Functions
The C3 HUD provides a wide range of functions to monitor your vehicle's performance and driving conditions. These include real-time display of speed, RPM, water temperature, battery voltage, clock, driving time, driving distance, fuel consumption, altitude, and satellite numbers.
Figure 5: Multiple Functions Overview
6.2 Interface Customization
The HUD offers a 'one-click switch' to freely collocate and customize diverse dashboard content. You can choose from over 100 small interfaces and change display colors to match your preference.
Figure 6: Customizable Display Interfaces
6.3 Navigation (C3 Plus Navigation Model Only)
For the C3 Plus Navigation model, the HUD integrates with mobile navigation applications to display driving directions directly on the screen. This feature requires mobile device interconnection, which is easy to set up.
Figure 7: C3 Plus Navigation Display
Figure 8: Mobile Navigation Setup
6.4 Settings Menu
The HUD features a user-friendly settings page accessible via the stereo buttons. This allows for easy adjustment of various parameters.
Figure 9: Functions Option Menu
Key settings include:
- BAT Alarm, BAT Adjust
- Speed adjust, Speed offset, Speed unit
- Engine Size, Fuel adjust
- Language Set, Sound Switch
- Change color (1, 2, 3)
- Brightness (1-8 levels)
- CWT Unit (Coolant Water Temperature Unit)
- Sum Distance, Power off time, Sleep voltage, Time adjust
- Factory set (reset to default)
6.5 Advanced Features
- Automatic Light Sense: The built-in light sensor system automatically adjusts screen brightness (18 levels) according to ambient light conditions (day, night, cloudy, rainy), ensuring clear visibility without flicker.
- Performance Tests: Includes Acceleration Test (0-100km/h) and Brake Test (100km/h-0km/h) to provide important reference data for your vehicle's dynamic performance.
- Fuel Consumption Data: Accurately calculates long-term historical average fuel consumption to help analyze and correct driving habits.
7. Maintenance
To ensure the longevity and optimal performance of your C3 HUD, follow these maintenance guidelines:
- Cleaning: Use the provided cleaning cloth or a soft, dry microfiber cloth to gently wipe the display screen and the unit's body. Avoid using harsh chemicals or abrasive materials that could scratch the surface.
- Placement: Ensure the HUD is securely placed on the dashboard to prevent movement or falling during driving.
- Cable Management: Keep the OBD or cigarette lighter cable neatly tucked away to avoid tangles or damage.
- Temperature: The LCD screen is designed for wide temperature ranges, but extreme heat or cold can affect its lifespan. Avoid prolonged exposure to direct sunlight when the vehicle is parked.
- Storage: If storing the device for an extended period, disconnect it from the vehicle and store it in a cool, dry place.
8. Troubleshooting
This section addresses common issues you might encounter with your C3 HUD.
8.1 Common Problems & Solutions
Figure 10: Common Car Troubles the HUD Can Help Diagnose
- No Display/Power: Ensure the OBD cable or cigarette lighter cable is securely connected to both the HUD and the vehicle's power source. Check the vehicle's ignition status.
- Inaccurate Readings: Verify that the HUD is in the correct mode (OBD or GPS). If using OBD mode, ensure your vehicle is compatible (generally cars after 2008). If using GPS mode, ensure a clear view of the sky for satellite acquisition. You may need to perform a 'Factory Reset' from the settings menu if data remains inconsistent.
- Ghosting/Double Image: The C3 HUD is designed to minimize ghosting with its optical imaging technology. Ensure the display screen is clean and positioned correctly. Adjust the angle if necessary.
- Alarms Triggering Incorrectly: Check the alarm thresholds in the settings menu (e.g., Speed Alarm, Water Temperature Alarm, Voltage Alarm) and adjust them to your desired levels.
- Navigation Issues (C3 Plus only): Ensure your mobile device is properly connected and the navigation app is running. Check for strong GPS signal on your phone.
8.2 Diagnostic Trouble Codes (DTCS)
The C3 HUD can perform car data scanning and depth detection diagnosis, allowing you to read and clear DTCS (Diagnostic Trouble Codes).
Figure 11: Car Data Scanning and DTCS Management
To scan or clear DTCS, navigate to the 'OBD Diagnose' option in the settings menu.
8.3 Safety Alarms
The HUD includes several safety alarms to prevent unsafe driving conditions:
- Low Voltage Alarm: Triggers if voltage drops below 10.0-15.0V (user-settable range).
- Water Temperature Alarm: Activates if water temperature reaches 120°C (user-settable).
- Speed Alarm: Alerts if speed exceeds a set RPM (default 6000r/min, settable 1000-8000).
- Speeding Reminder: Provides a reminder if speed exceeds 150KM/h (settable 50-200km/h).
- Engine Failure Alarm: Notifies of potential engine issues.
Figure 12: Safety Alarms Overview
9. User Tips
- Vehicle Compatibility: The OBD HUD is generally suitable for cars manufactured after 2008. If your vehicle is older, it might not be fully compatible with the OBD mode. In such cases, the GPS mode can still be used.
- Voltage Considerations: If your vehicle's voltage is higher than 24V (common in some heavy-duty vehicles), always use the USB cable for GPS mode to prevent damage to the device.
- Speed Color Indicators: Pay attention to the speed display color: White for 0-99, Yellow for 100-119 (reminder), and Red for 120+ (alarm). This visual cue can help you maintain safe speeds.
- Brightness Adjustment: Utilize the automatic light sensor or manually adjust the brightness (levels 1-8) to ensure optimal visibility in all lighting conditions.
10. Warranty and Support
For any technical assistance, warranty claims, or further inquiries, please refer to the contact information provided with your purchase or visit the official RYSJM support website. Keep your purchase receipt as proof of purchase for warranty services.
This product comes with an English manual for detailed instructions and guidance.
