1. Product Overview
The iKiKin AP-6 Heads Up Display (HUD) is a versatile automotive device designed to project essential driving information directly into the driver's line of sight. It features a dual system, supporting both OBD2 and GPS protocols, ensuring compatibility with a wide range of vehicles. This allows for real-time monitoring of various vehicle parameters such as speed, RPM, water temperature, voltage, fuel consumption, and more, enhancing driving safety and convenience.

Image: The iKiKin AP-6 HUD offers 9 distinct display interfaces, allowing users to customize the information presented on screen. These interfaces can show data such as speed, RPM, voltage, fuel consumption, and various alarms simultaneously.
2. Package Contents
Verify that all items listed below are included in your package:
- 1x iKiKin AP-6 Heads Up Display Unit
- 1x OBD2 Cable
- 1x 3M Adhesive Tape
- 1x Hexagon Wrench
- 1x Crowbar (for trim removal)
- 1x User Manual (this document)

Image: All components included in the iKiKin AP-6 Heads Up Display package, ensuring you have everything needed for installation.
3. Setup and Installation
3.1 Device Overview

Image: Detailed views of the iKiKin AP-6 HUD, highlighting the bracket knob, adjustable bracket, light sensor, upgrade interface (USB), and OBD interface port.
3.2 Installation Steps
- Choose Placement: Select a suitable location on your dashboard where the HUD will not obstruct your view of the road. The device can be placed directly on the dashboard or attached to the windshield using the provided bracket.
- Secure the Device: Use the 3M adhesive tape to firmly secure the HUD unit to your chosen location. Ensure the surface is clean and dry before applying the tape. The bracket can be rotated to adjust the visual angle and height for optimal viewing.
- Connect OBD2 Cable: Locate your vehicle's OBD2 port, typically found under the dashboard on the driver's side. Connect one end of the provided OBD2 cable to the HUD's OBD interface and the other end to your vehicle's OBD2 port. Use the crowbar to carefully tuck the cable along the vehicle's interior trim for a neat installation.
- Power On: Once connected, the HUD will power on automatically when the vehicle's ignition is turned on.
3.3 OBD2 Mode vs. GPS Mode
The AP-6 operates in a dual OBD2 + GPS system. By default, both functions are active. If your vehicle does not support the OBD2 protocol (e.g., older models pre-2004, some electric vehicles, or specific vehicle manufacturers), the device will automatically switch to GPS-only mode. In GPS mode, data such as speed, altitude, satellite number, and compass direction will be displayed.

Image: Visual representation of the multi-functional capabilities of the AP-6, including both OBD2 and GPS data points and alarm features.
4. Operating Instructions
4.1 Power On/Off
The device automatically powers on when the vehicle starts and powers off when the vehicle is shut down, preventing battery drain.
4.2 Display Interfaces
The AP-6 offers 9 different display interfaces. Use the control button (usually a scroll wheel or button on the device) to cycle through these interfaces and select your preferred view. Each interface presents a unique combination of data points.
4.3 Understanding Display Data
The HUD can display a variety of driving data:
- Speed: Current vehicle speed (KM/H or MPH).
- RPM: Engine Revolutions Per Minute.
- Water Temperature: Engine coolant temperature.
- Voltage: Vehicle battery voltage.
- Fuel Consumption: Real-time fuel usage.
- Driving Distance: Distance traveled during the current trip.
- Driving Time: Duration of the current trip.
- Altitude: Current elevation (GPS mode).
- Satellite Number: Number of GPS satellites connected (GPS mode).
- Compass: Driving direction (GPS mode).
- Accelerator Test: Measures 0-100 km/h acceleration time.
- Brake Test: Measures braking distance and time.
- Turbo: Turbo pressure (if applicable to vehicle).
- Data Stream: Displays various PID (Parameter ID) values like DTC status, engine load, fuel trim, etc.
4.4 Alarm Functions
The AP-6 includes several alarm features to alert the driver to potential issues:
- Low Voltage Alarm: Alerts when battery voltage drops below a safe level.
- High Water Temperature Alarm: Warns if engine coolant temperature exceeds a safe threshold.
- Over Speed Alarm: Notifies when the vehicle exceeds a preset speed limit.
- Fatigue Driving Reminder: Suggests taking a break after extended driving periods.
- RPM Alarm: Alerts if engine RPM exceeds a preset limit.
- Engine Fault Code Alarm: Indicates an engine diagnostic trouble code (DTC). The device can also clear these fault codes.
4.5 Ambient Light Function
The device features an ambient light that changes color based on driving conditions:
- Blue Light: Displays during normal driving conditions. The brightness adjusts automatically based on ambient light.
- Red Light: Activates as an alarm indicator during abnormal driving conditions, such as over-speeding, to draw immediate attention.

Image: The iKiKin AP-6 HUD displaying information clearly on a car dashboard during daylight hours, demonstrating its visibility.
5. Maintenance
To ensure the longevity and optimal performance of your iKiKin AP-6 HUD, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the display screen and the device body. Avoid using abrasive cleaners, solvents, or chemical sprays, as these can damage the surface.
- Storage: If storing the device for an extended period, disconnect it from the OBD2 port and store it in a cool, dry place away from direct sunlight and extreme temperatures.
- Cable Care: Ensure the OBD2 cable is not pinched or excessively bent, which could damage the internal wiring.
- Firmware Updates: Periodically check the manufacturer's website for any available firmware updates. Updates can improve performance, add features, or fix bugs. The device has an 'Upgrade interface' (USB port) for this purpose.
6. Troubleshooting
If you encounter issues with your iKiKin AP-6 HUD, refer to the following common problems and solutions:
| Problem | Possible Cause / Solution |
|---|---|
| Device does not power on. | Ensure the OBD2 cable is securely connected to both the HUD and the vehicle's OBD2 port. Check if the vehicle's ignition is on. Test the OBD2 port with another device if possible. |
| No data displayed in OBD2 mode. | Your vehicle may not support the OBD2 protocol, or it may be an older model (pre-2004). The device should automatically switch to GPS mode. If not, check vehicle compatibility. |
| Inaccurate speed reading. | In GPS mode, ensure the device has a clear view of the sky for satellite reception. In OBD2 mode, the speed is read directly from the vehicle's ECU. You may need to calibrate the speed setting in the HUD's menu if there's a slight discrepancy. |
| GPS clock shows incorrect time or doesn't update for Daylight Savings. | Access the device settings to manually adjust the time zone or enable/disable Daylight Savings Time. Refer to the detailed manual for specific menu navigation. |
| Display is too dim or too bright. | The device has an automatic brightness adjustment feature via its light sensor. Ensure the light sensor on the back of the unit is not obstructed. Manual brightness adjustment may also be available in the settings. |
| Compass is not working well. | Ensure the device has a clear view of the sky for optimal GPS signal. Magnetic interference from other devices or vehicle components can affect compass accuracy. |
| Device randomly turns off during a trip. | Check the OBD2 cable connection for looseness. Ensure the vehicle's OBD2 port is functioning correctly (test with a scan tool). This could also indicate a power supply issue from the vehicle. |
7. Specifications
| Feature | Specification |
|---|---|
| Model | AP-6 |
| System | OBD2 + GPS Dual System |
| Material | Metal |
| Color | Blue, Red (Ambient Light) |
| Item Weight | 238 g (8.4 Ounces) |
| Dimensions (L x W x H) | Approx. 10 cm x 10 cm x 6 cm |
| Display Type | Heads Up Display |
| Power Source | Vehicle OBD2 Port |
| Alarms | Low Voltage, High Water Temperature, Over Speed, Fatigue Driving, RPM, Engine Fault Code |
| Ambient Light | Blue (Normal), Red (Alarm) |
8. Warranty and Support
iKiKin products are designed for reliability and performance. For warranty information, please refer to the documentation provided with your purchase or visit the official iKiKin website. If you require technical assistance, troubleshooting beyond this manual, or have questions regarding your device, please contact iKiKin customer support through their official channels. Keep your purchase receipt as proof of purchase for warranty claims.