1. Product Overview
This manual provides detailed instructions for the installation, operation, and maintenance of your Junsun Car Radio head unit. This unit is designed to upgrade the infotainment system in specific Subaru models, offering modern features such as wireless Apple CarPlay, Android Auto, GPS navigation, and Bluetooth connectivity.
Compatible Car Models:
- Subaru Forester: 2012-2015
- Subaru WRX: 2012-2015
- Subaru Impreza: 2012-2015
- Harman Kardon supported.

Image: Overview of compatible car models and included installation frames.
2. What's in the Box
Please ensure all components are present before beginning installation:
- Junsun Car Radio Head Unit (9-inch screen)
- Power Cable
- Crowbar (for panel removal)
- Screwdriver
- Can Bus
- Reversing Line
- Microphone
- GPS Module
- USB Cable 1
- USB Cable 2
- RCA Cable

Image: All components included in the Junsun Car Radio package.
3. Setup and Installation
This section guides you through the process of replacing your factory radio with the Junsun Car Radio. It is recommended to watch the provided video for a visual guide.
Installation Video Guide:
Video: Step-by-step installation guide for the Junsun Car Radio in Subaru Forester, WRX, and Impreza models (2013-2015) without a Harman Kardon sound system.
General Installation Steps:
- Remove OEM Radio: Carefully use the provided crowbar and screwdriver to remove the dashboard trim panels and the original factory radio. Disconnect all wiring harnesses from the OEM unit.
- Prepare New Head Unit: Transfer any necessary components (like AC vents or hazard light buttons) from the old trim to the new head unit's frame.
- Connect Wiring: Connect the appropriate wiring harnesses from your vehicle to the Junsun head unit. Ensure all connections are secure. Refer to the wiring diagram below.
- Install GPS Module and Microphone: Connect the GPS module and external microphone. Route the cables discreetly.
- Test Functionality: Before fully reassembling, temporarily power on the vehicle and test the basic functions of the new head unit (power, audio, touch screen, steering wheel controls, etc.).
- Reassemble: Carefully reassemble the dashboard trim panels, ensuring all clips and screws are properly secured.
Wiring Information:
If the back of your factory radio matches the image provided, the power harness ending in number 110 is correct. After confirming the wiring, manually learn the steering wheel control function in the device settings. Otherwise, the steering wheel function will not be available.

Image: Rear view of a factory radio, indicating the power harness connection for the Junsun unit.
Refer to the RCA cable diagram for connecting external audio/video components, including the backup camera. For factory backup cameras, connect pins 5 to 6 as indicated.

Image: Detailed diagram of RCA cable connections for various functions.
4. Operating Instructions
Your Junsun Car Radio features an intuitive Android-based interface. Here are some key functionalities:
Main Interface and Apps:
The main screen provides quick access to navigation, radio, video, music, Bluetooth, and other applications. You can customize the layout and access additional apps via the app drawer.

Image: Main interface and app screen of the Junsun Car Radio.
Wireless Apple CarPlay & Android Auto:
Connect your smartphone wirelessly for seamless integration of navigation, music, calls, and messages. The unit supports both Apple CarPlay and Android Auto.

Image: Wireless Apple CarPlay and Wired Android Auto functionality.
GPS Navigation:
Utilize the built-in GPS module for accurate navigation. The unit supports various mapping applications.

Image: GPS Navigation interface.
Built-in DSP (Digital Sound Processor):
Fine-tune your audio experience with the integrated DSP, offering smart bass, equalizer, loudness, delay, and filter controls.

Image: Built-in DSP for advanced audio settings.
FM/AM Radio:
Access your favorite radio stations with the FM/AM tuner, featuring RDS support for station information.

Image: FM/AM/RDS radio interface.
Bluetooth 5.0:
Connect your phone via Bluetooth for hands-free calling and audio streaming.

Image: Bluetooth connectivity for phone calls and music.
Steering Wheel Control (SWC):
The unit supports steering wheel controls. Configuration may require manual learning in the device settings after installation.

Image: Steering Wheel Control learning interface.
Rear Camera Input:
The unit supports a rear camera for parking assistance. The camera feed will automatically display when the vehicle is in reverse.

Image: Rear camera view with parking guidelines.
Mirror Link & Split Screen:
Mirror your phone's screen onto the head unit or use the split-screen function to run two applications simultaneously.

Image: Mirror Link and Split Screen functionality.
Product Features Overview Video:
Video: A brief overview of the Junsun Car Radio's main features and user interface.
5. Maintenance
- Screen Cleaning: Use a soft, lint-free cloth to clean the touch screen. Avoid abrasive cleaners or harsh chemicals.
- Software Updates: Periodically check the manufacturer's website or contact customer support for available firmware updates to ensure optimal performance and resolve potential issues.
- Temperature Control: Avoid exposing the unit to extreme temperatures for prolonged periods.
- Wiring Integrity: Ensure all wiring connections remain secure and free from damage.
6. Troubleshooting
- No Power: Check all power connections and fuses. Ensure the unit is properly seated in the dashboard.
- Spotty Wireless CarPlay/Android Auto: Ensure your phone's Bluetooth and Wi-Fi are enabled. Try turning Bluetooth off and on again on your phone. Contact customer support for the latest firmware updates, as this can resolve connectivity issues.
- Steering Wheel Controls Not Working: Access the device settings and manually configure the steering wheel control functions. Ensure the correct power harness (ending in number 110 for compatible factory radios) is used.
- Factory USB Port Not Working: The factory USB port may not be compatible. Use the provided aftermarket USB cables for connectivity.
- Factory Reverse Camera Issues: If the factory reverse camera feed still appears on the small display, a specific harness for integrating the factory camera may be required and might not be included. Consult the manufacturer for compatibility or alternative solutions.
- AC Vents Not Fitting: Ensure you have the correct model variant for your specific vehicle year and trim. Minor adjustments or specific adapters might be needed for some installations.
- Audio Quality Issues: Utilize the built-in DSP settings to adjust equalization, balance, and other audio parameters. Ensure speaker connections are correct.
7. Specifications
- Item Weight: 4.2 pounds
- Package Dimensions: 14.57 x 12.91 x 5.83 inches
- Display Size: 9 Inches
- Battery Life: 6 Hours (internal clock/memory retention)
- Voice Command: Microphone
- Connectivity Technology: Wi-Fi, Bluetooth
- Map Type: North America (pre-installed or compatible)
- Audio Output Mode: AUX
- RAM: 2GB
- ROM: 32GB
8. Warranty and Support
For warranty information, technical support, or to inquire about firmware updates, please contact Junsun customer service. Refer to your purchase documentation for specific warranty terms and contact details.