1. Introduction
The iKiKin AP1 Head-Up Display (HUD) is a versatile automotive accessory designed to project essential driving information directly into the driver's line of sight. Featuring a dual OBD2 and GPS system, it offers comprehensive data display and compatibility with a wide range of vehicles. This manual provides detailed instructions for the proper installation, operation, and maintenance of your AP1 HUD.
2. Product Features
- Dual System (OBD2 & GPS): Allows simultaneous display of data from both OBD2 and GPS modes, ensuring broad vehicle compatibility. GPS mode functions in all cars.
- Multiple Display Interfaces: Offers 8 different user interfaces (UIs) to choose from, allowing customization of displayed data such as speed, voltage, and water temperature.
- Integrated A-Pillar Trim Installation: Designed for installation on the A-pillar trim, providing an optimal viewing angle. Can also be placed on the dashboard.
- Four Main Alarms: Includes over speed, low voltage, high water temperature, and engine RPM alarms for enhanced driving safety.
- Clear Fault Code Function: Enables clearing of Diagnostic Trouble Codes (DTCs) directly from the device.
- Professional Design: Features an integrated raised key for easy operation and a high-performance processing chip for smooth, high-speed data display.
3. Package Contents and Dimensions
Before installation, please ensure all components are present and inspect them for any damage.
- iKiKin AP1 HUD Unit
- OBD Cable
- Velcro Mounting Pads
- User Manual

This image displays the iKiKin AP1 HUD unit, OBD cable, Velcro mounting pads, and the user manual. It also shows the dimensions of the device: 61mm height, 49mm width, and 97mm length.
4. Installation Guide
Follow these steps to properly install your iKiKin AP1 HUD:
- Choose Installation Location: The AP1 HUD can be installed on the A-pillar trim or placed directly on the dashboard. Select a position that provides clear visibility without obstructing your view of the road.
- Connect OBD Cable: Locate your vehicle's OBD2 port (typically under the dashboard on the driver's side). Plug one end of the provided OBD cable into the HUD unit and the other end into the vehicle's OBD2 port.
- Secure the Device: Use the included Velcro mounting pads to firmly secure the HUD unit in your chosen location. Ensure it is stable and does not move during driving.
- Power On: The device will automatically power on when the vehicle's ignition is turned on.

The iKiKin AP1 Head-Up Display can be installed on the A-pillar trim or placed on the dashboard, providing clear visibility of driving data.
5. Operating Modes (OBD2 & GPS)
The AP1 HUD features a dual system, allowing operation in either OBD2 or GPS mode. The default mode is OBD2.
5.1. OBD2 Mode
OBD2 mode provides comprehensive vehicle data directly from your car's computer. Data displayed includes:
- Speed
- Clock
- RPM (Revolutions Per Minute)
- Water Temperature
- Voltage
- Fuel Consumption
- Driving Time
- Driving Distance
- Turbo Pressure (if applicable to vehicle)
- Acceleration Test
- Brake Test
- Clear Fault Code
- Oil Temperature
OBD2 Compatibility Notes:
- American gasoline cars produced after 2004 and compliant with OBD2 protocol.
- Other regions' gasoline cars produced after 2008 and compliant with OBD2 protocol.
Common Incompatible Car Models for OBD2 Mode:
- American Cars: Dodge, JEEP, SAIL, Chrysler (models produced before 2004 and 2004).
- All French and Italian car models.
- Japan Cars: Suzuki, Mazda6, Infiniti (QX50, Q50, Q501), for Avanza 2013, Lexus (is250, ex250, es300h), Honda (Jazz, CRV), and cars produced before 2008.
- Some South Korean KIA and Hyundai models (e.g., Hyundai Sonata 2013, Kia Soul PS 2017).
- Oil-electric hybrid and diesel cars, pickup trucks, trucks, RVs, and cars with modified computer systems.
5.2. GPS Mode
GPS mode uses satellite positioning to provide speed and other navigation-related data. This mode is universally compatible with all cars, making it a suitable alternative if your vehicle is not compatible with OBD2 mode. Data displayed includes:
- Speed
- Clock
- Driving Time
- Satellite Number
- Altitude
- Driving Distance

This diagram illustrates the various data points available in both OBD2 and GPS operating modes, including speed, RPM, voltage, and more.
6. Basic Operation and Settings
The AP1 HUD is operated using a single integrated button and left/right navigation buttons.
- Power On: The device automatically powers on when the vehicle starts. Upon startup, it will display the current voltage for 3 seconds.
- Switching Display Interface: Short press the 'M' button to cycle through the available display interfaces. There are 8 different UIs to choose from.
- Entering Settings Menu: Long press the 'M' button for 5 seconds to enter the setting menu.
- Navigating Settings: Use the Left and Right buttons to switch between different setting options (e.g., Speed Set, RPM Set, Fuel Set, System Set).
- Confirming/Saving Settings: Press the 'OK' button to enter a specific setting or to save changes.
- Power Off: When the vehicle powers off, the HUD will display the total trip driving distance before shutting down.

This image details the operational controls and display functions, including how to switch interfaces, access settings, and view voltage.
7. Special Functions
The AP1 HUD includes several special functions for monitoring vehicle performance:
- Acceleration Test: Measures the time required to accelerate from 0 km/h to 100 km/h.
- Brake Test: Measures the time and distance taken for the vehicle to come to a complete stop from a certain speed.
- Turbo Pressure: Displays the current turbo pressure of your vehicle. Note: This function will only display data if your car is equipped with a turbocharger.

This graphic demonstrates the acceleration test, turbo pressure display, and brake test features of the HUD.
8. Alarm Functions
The AP1 HUD is equipped with several alarm functions to alert the driver to potential issues:
- Over Speed Alarm: Alerts you when your vehicle exceeds a preset speed limit.
- Low Voltage Alarm: Notifies you if the vehicle's battery voltage drops below a safe level.
- High Water Temperature Alarm: Warns you if the engine's coolant temperature becomes excessively high.
- Engine RPM Alarm: Alerts you if the engine RPM exceeds a specified limit.
- Clear Fault Code (DTC): The device has a function to clear Diagnostic Trouble Codes, which can turn off check engine lights after an issue has been resolved.
9. Troubleshooting
If you encounter issues with your iKiKin AP1 HUD, refer to the following common problems and solutions:
- Device not powering on or flashing '0' then going blank:
This often indicates an OBD2 compatibility issue. Refer to the OBD2 Compatibility Notes in Section 5.1. If your car is not compatible with OBD2 mode, switch the device to GPS mode. Ensure the OBD cable is securely connected. - Speedometer reading in Kilometers per Hour (KM/H) instead of Miles per Hour (MPH):
To change the unit: Long press the 'M' button for 5 seconds to enter the settings menu. Use the Left/Right buttons to navigate to menu option 7 (System Set or similar, depending on UI). Press 'OK' to enter. Use Left/Right to select 'MPH'. Press 'OK' to confirm, then long press 'M' again for 5 seconds to save the adjustment. - Battery drain when using OBD2 mode:
Some vehicles' OBD2 ports provide constant power even when the ignition is off. If your car is not driven daily, the HUD may slowly drain the battery. Consider unplugging the device when the vehicle is parked for extended periods, or switch to GPS mode which typically uses less power when idle. - Device resets or shuts off while driving:
Check the OBD cable connection to ensure it is firm and not loose. A fluctuating power supply can cause resets. If the issue persists, ensure your vehicle's electrical system is stable. - Device not working correctly in high temperatures:
Extreme heat can affect electronic devices. If the HUD malfunctions in very hot conditions, allow the vehicle's interior to cool down. The device should resume normal operation once temperatures normalize. - Inaccurate speed readings:
While the HUD is generally accurate, minor discrepancies (1-2 MPH) can occur. You may be able to calibrate the speed in the settings menu if an adjustment option is available.
10. Specifications
| Brand | iKiKin |
| Model | AP1 |
| Material | Plastic, Metal, Glass, Fabric |
| Item Weight | 5.3 ounces (0.15 Kilograms) |
| Package Dimensions | 4.49 x 4.41 x 2.64 inches |
| Manufacturer | iKiKin |
| ASIN | B089Y8MY5Z |
| Date First Available | June 10, 2020 |
11. Warranty and Support
Specific warranty details for the iKiKin AP1 HUD are not provided in this manual. For warranty information, technical support, or further assistance, please refer to the official iKiKin store or contact their customer service directly.
Visit the iKiKin Store: iKiKin Official Store





