1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Hieha CP03 7 Inch Double Din Car Stereo. Please read this manual thoroughly before using the product to ensure proper functionality and safety. The Hieha CP03 is designed to enhance your in-car entertainment and connectivity with features like Apple CarPlay, Android Auto, Bluetooth, and a backup camera.

Figure 1: Hieha CP03 Double Din Car Stereo Front View

Figure 2: Overview of Hieha CP03 Key Functions
2. Setup and Installation
Proper installation is crucial for the optimal performance of your car stereo. It is recommended to have this unit installed by a professional. Ensure your vehicle's voltage is below 14V; this unit is not compatible with trucks.
2.1 Package Contents
Verify that all components are present in the package:
- Hieha CP03 Car Stereo Unit
- Mounting Bracket Set
- Wiring Harness A
- Wiring Harness B
- Backup Camera (with Camera Wire A and Camera Wire B)
- User Manual
- Remote Control (Steering Wheel Remote)

Figure 3: Hieha CP03 Unit Dimensions and Included Accessories
2.2 Physical Dimensions
The Hieha CP03 is a 7-inch double din unit. Refer to Figure 3 for detailed dimensions:
- Length: 7.08 inches (178mm)
- Width: 4 inches (102mm)
- Depth: 2.48 inches (65mm)
Ensure your vehicle's dashboard opening is compatible with these dimensions. Additional wiring harnesses or a dash kit may be required depending on your car model.
2.3 Wiring Connection
Connect the provided wiring harnesses to your vehicle's electrical system. Match the wires according to the color codes and functions specified in the wiring diagram included in the package. Incorrect wiring can damage the unit or your vehicle's electrical system.

Figure 4: Wiring Harnesses for Hieha CP03
2.4 Backup Camera Installation
The unit includes an HD, night vision, and 170° viewing angle waterproof backup camera. Connect the camera to the designated input on the stereo unit using Camera Wire A and Camera Wire B. Ensure the camera is mounted securely at the rear of your vehicle for an unobstructed view.

Figure 5: Backup Camera View and Features
3. Operating Instructions
3.1 Power On/Off and Basic Navigation
Press the power button to turn the unit on or off. The touchscreen interface allows for intuitive navigation through various functions. The home screen provides access to Radio, Bluetooth, USB, AV In, Link (Phone Mirroring), and Aux inputs, along with a Setup menu.
3.2 Radio Operation (FM/AM)
Select the "Radio" icon from the home screen. You can manually tune to stations or use the auto-scan feature to find available FM/AM frequencies. Save your favorite stations as presets for quick access.
3.3 Bluetooth Connectivity
To connect your phone via Bluetooth:
- Select the "Bluetooth" icon on the home screen.
- Enable Bluetooth on your mobile device and search for available devices.
- Select "Hieha CP03" (or similar name) from the list on your phone.
- Confirm the pairing code if prompted.
Once connected, you can make/receive hands-free calls and stream audio from your device. The unit features a built-in noise-cancelling microphone and a 3.5mm external microphone jack for clear communication.

Figure 6: Bluetooth Music Streaming Interface
3.4 Apple CarPlay and Android Auto
Connect your smartphone to the stereo via a USB cable to activate Apple CarPlay or Android Auto. This allows you to access phone calls, navigation, music, and other compatible mobile applications directly on the stereo's screen, minimizing distractions while driving.

Figure 7: Apple CarPlay Interface
Video 1: Demonstration of Apple CarPlay and Android Auto functionality on the Hieha CP03 car stereo, including voice control for navigation, phone calls, and music playback.
3.5 Phone Mirroring (Link)
The "Link" function allows you to mirror your mobile phone's screen onto the car stereo display via a USB connection. This enables viewing of navigation, video playback, and other phone functions. Note: The resolution of mirrored content cannot exceed 1920*1080. Compatibility may vary; the mirror link software is continuously being updated for broader compatibility.

Figure 8: Phone Mirroring Functionality
3.6 Voice Control
Utilize voice commands through Siri (for Apple CarPlay) or Google Assistant (for Android Auto) to control various functions such as making calls, navigating, and playing music, allowing for a hands-free experience.

Figure 9: Voice Control Features
3.7 USB/SD Card Playback
Insert a USB drive or SD card into the respective ports to play audio and video files. The unit supports various multi-format playback.
3.8 Backup Camera Display
When the vehicle is shifted into reverse, the stereo automatically displays the feed from the connected backup camera, providing a wide 170° view with night vision capabilities and parking assistance lines for safer maneuvering.
3.9 Steering Wheel Controls (SWC)
The unit supports steering wheel controls. Connect the SWC wires to your vehicle's steering wheel control interface (if available) to operate basic functions like volume, track change, and mode selection directly from your steering wheel.
4. Maintenance
To ensure the longevity and optimal performance of your Hieha CP03 car stereo, follow these maintenance guidelines:
- Screen Cleaning: Use a soft, lint-free cloth to gently wipe the touchscreen. For stubborn smudges, slightly dampen the cloth with water or a screen-safe cleaner. Avoid harsh chemicals or abrasive materials.
- General Cleaning: Keep the unit free from dust and debris. Use a soft brush or compressed air to clean around buttons and ports.
- Avoid Extreme Temperatures: Do not expose the unit to extreme heat or cold for extended periods, as this can affect its electronic components.
- Cable Management: Ensure all cables are securely connected and not pinched or damaged.
5. Troubleshooting
If you encounter issues with your Hieha CP03 car stereo, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Incorrect wiring, blown fuse, vehicle battery issue. | Check power connections, inspect vehicle fuses, ensure battery is charged. Consult a professional for wiring verification. |
| No sound | Volume too low, incorrect audio source, speaker wiring issues. | Increase volume, select correct audio source (Radio, Bluetooth, USB, etc.), check speaker connections. |
| Bluetooth not connecting | Bluetooth not enabled on phone, incorrect pairing, interference. | Ensure phone Bluetooth is on and discoverable. Delete previous pairings and re-pair. Move phone closer to the unit. |
| CarPlay/Android Auto not starting | Faulty USB cable, phone not compatible, app issues. | Use a high-quality USB data cable. Ensure your phone's OS and apps are updated. Restart both phone and stereo. |
| Backup camera not displaying | Incorrect camera wiring, reverse gear signal not detected. | Verify camera power and video signal connections. Ensure the reverse trigger wire is correctly connected to the vehicle's reverse light circuit. |
| Phone Mirroring issues | Phone compatibility, app version, cable quality. | Check phone OS version (Android 10 or older, specific iPhone models). Use original or certified USB cable. Ensure the mirroring app on the stereo is updated. |
If problems persist, consider performing a factory reset via the "Setup" menu (refer to the "Setup" section for navigation to settings). If the issue remains unresolved, contact Hieha customer support.
6. Specifications
| Feature | Detail |
|---|---|
| Brand | Hieha |
| Model | CP03 |
| Type | 7 Inch Double Din Car Stereo |
| Display | Touchscreen |
| Connectivity | Bluetooth, USB, Auxiliary |
| Smartphone Integration | Apple CarPlay, Android Auto, Phone Mirroring |
| Audio Output Mode | Stereo |
| Surround Sound Channel Configuration | 4.0 |
| Special Features | Touchscreen, Backup Camera (HD, Night Vision, 170°), Built-in/External Mic, FM/AM Radio, Steering Wheel Controls |
| Item Weight | 2.4 pounds |
| Product Dimensions | 7.08 x 4 x 2.48 inches |
7. Warranty and Support
For warranty information, product registration, or technical support, please refer to the warranty card included in your product packaging or visit the official Hieha website. You may also contact the seller directly for assistance with any product-related inquiries or issues.
Contact Information: Refer to your purchase documentation or the Hieha brand store on Amazon for the most up-to-date support contact details.