The situation when, after installing a new multimedia system, the image from the rear view camera is displayed upside down or mirrored is one of the most common problems among car enthusiasts. This behavior is typical for universal Chinese head units, where the software is configured for a wide range of peripheral devices. Owners are often faced with the fact that parking lines do not coincide with the real trajectory, and the orientation of the picture makes safe parking impossible.
Fortunately, in most cases the problem is solved by software methods directly through the settings of the radio itself, without the need to disassemble the panel or solder wires. However, some specific models or when using non-standard cameras may require physical intervention in the wiring diagram. Below we will analyze in detail all the possible ways to correct the image orientation, from simple settings in the menu to hardware modifications.
Diagnostics of the problem and determination of the type of inversion
Before taking active steps, it is necessary to accurately determine the nature of the image distortion. This is critically important, since the correction methods for different types of errors are radically different. Incorrect diagnosis can lead to you spending a long time looking for the “mirror reflection” setting when the problem is the vertical rotation of the matrix.
Carefully inspect the picture on the display with reverse gear engaged. If objects on the screen are flipped vertically (the top is at the bottom), this indicates the need to activate the vertical (Flip) mode. If the image is displayed as in a mirror (the inscriptions are read from right to left, and the movement of the car to the left on the screen looks like movement to the right), then adjustment horizontal reflection (Mirror) is required. In rare cases, a combination of both effects occurs.
It is also worth checking whether the camera works at all or whether you just see a black screen with blue parking lines. If there is an image, but it is upside down, the problem is almost always resolved in the settings menu. If the screen is black, it may be a lack of power or an incorrect connection of the video input CVBS.
⚠️ Attention: If the image jerks, has strong interference, or disappears when the engine is running, the problem may not be in the orientation settings, but in poor ground contact or interference from the generator. In this case, first eliminate the electrical noise.
Before changing the settings, take a photo of the current position of the sliders and checkmarks on the screen. This will allow you to quickly return everything to the way it was if you accidentally change the wrong parameter.
Software setup via the factory menu (Factory Settings)
The most common and safest way to fix an upside-down camera is to use the hidden factory menu of a Chinese radio. Access to this section is usually password protected to prevent the user from accidentally changing critical system parameters. The interface may differ depending on the installed firmware (MCU) and processor model.
To enter the menu, you need to go to the main device settings and find the item called Factory Settings, Car Settings or "Factory settings". The system will ask you to enter a digital code. The most popular passwords for Chinese Android radios: 8878, 1234, 0000, 3368 or 1617. If none of them are suitable, try searching for information on the specific model of your head unit on the forums.
After successfully logging into the section, find the tab responsible for the camera. It may be called Backcar Setting, Reverse Image or simply “Camera”. This is where the switches that control the geometry of the image are located. You will need to find the options Vertical Flip (vertical flip) and Horizontal Mirror (horizontal mirror).
- 🔄 Vertical Flip: switches the image from top to bottom. Activate this function if the camera displays the image upside down.
- ↔️ Horizontal Mirror: reflects the image horizontally. Use if the picture is mirrored.
- 🎥 Camera Type: select the camera type (AHD, CVBS, TVI). Selecting the wrong type can also result in a lack of color or a black and white image.
After changing the position of the switches, be sure to press the Save or Apply button at the bottom of the screen. On some systems, changes are applied instantly; on others, a reboot of the radio is required. Check the operation of the camera by turning on the reverse gear.
Setting through the "Back Car" application
On some modern radio models, especially on processes Rockchip PX6 or Unisoc UIS7862, camera settings are placed in a separate application, accessible directly from the desktop. This simplifies the process since it does not require entering passwords deep into system menus. The application icon is usually called Back Car, CarImage or has a video camera icon.
Launch the application and go to the settings section (gear icon). Here you will see a more friendly interface with visual previews. Often developers include settings for the type of parking lines and their color in the same section. Look for items Mirror and Flip. The operating logic is the same: turn on the checkbox if the image is flipped accordingly.
A feature of such applications is the ability to calibrate parking lines. If, after flipping the image, the lines no longer correspond to the dimensions of the car, you can adjust their width and angle of inclination directly in this menu. This is especially useful if the camera is installed at a non-standard angle.
| Processor type | Settings location | Probable password | Features |
|---|---|---|---|
| MTK (MediaTek) | Factory settings | 8878 / 1234 | Many tabs, be careful with the MCU |
| PX6 / PX5 | Back Car application | 1617 / 8888 | Separate calibration menu |
| Allwinner | System settings | 0000 / 123456 | Simple interface |
| Qualcomm | Engineering menu | Specific | Rarely requires configuration |
⚠️ Attention: In factory settings, avoid the section
MCU UpdateorFirmware Updateif you are not 100% sure of the firmware version. Incorrect updating of the microcontroller can turn the radio into a “brick.”
What to do if the password does not work?
If standard passwords do not work, try entering the code specified in the instructions for your model. You can also try combinations 888888, 3368, 5678. As a last resort, look for a sticker on the body of the radio itself (sometimes the password is written there) or contact the seller on AliExpress/Ozon, indicating the firmware batch number.
Hardware method: switching the control wire
If the software settings are not give results or the desired item is missing from the menu (which happens on very old or stripped-down firmware), the hardware method remains. Many Chinese rear view cameras have an additional wire (usually white or brown), which is responsible for programmatically flipping the image inside the camera itself.
This wire is often called Flip, Mirror or VCC. In the standard circuit, it is connected to the positive power wire of the camera (+12V). The point of the method is to change the potential on this wire. In some cameras, connecting to the plus activates the flip, in others, disconnecting from the plus (connecting to the minus or breaking) enables this mode.
To implement this method, you will need to get to the camera connection connector. Locate the thin wire coming from the camera along with the main video cable. Try disconnecting it from the positive and shorting it to ground (car body or negative wire). If this does not help, return everything as it was and try the other way around: if the wire was free, connect it to the positive.
- 🔌 Find the wire: usually this is the thinnest wire in the bundle, other than the main RCA video connector.
- ✂️ Safe disconnection: use insulating tape or terminals, do not twist "conscientiously" wires without insulation.
- 🔋 Checking polarity: make sure that you do not connect plus to minus directly, this can burn the radio fuse.
This method does not work with all cameras. Modern AHD cameras often do not have such a wire, since all settings are performed digitally. However, for analog cameras CVBS this is a working option in 80% of cases.
Hardware flip works at the signal level before it hits the radio, so it is a priority if the software menu of the radio is "buggy" or does not save settings.
Features of setting up AHD high-resolution cameras
With the advent of cameras in the AHD (720p, 1080p) format, the situation has become more complicated. These cameras transmit a digital signal and normal analog settings may not work. To display the AHD camera correctly, the radio must support the appropriate data transfer standard.
The correct video input format must be selected in the radio settings menu. If you have a 1080p camera, and in the settings it is CVBS or Auto, there may be no image at all, or it will be black and white and upside down. Find the item Video In Format or Camera Resolution and select the value corresponding to your camera (for example, AHD 1080P).
Some AHD cameras have a joystick or a button on the body to switch modes (CVBS/AHD) and flip the image. If you bought a universal camera, try holding down this button for 5-10 seconds while the camera is turned on power supply. The indicator on the camera may blink, indicating a change in mode.
⚠️ Attention: Characteristics and setup methods may vary depending on the specific batch of the radio and software version. The manufacturer may change the menu location without warning. Always check the current documentation for your device revision.
Reset and update. firmware as a last resort
If none of the above methods help, there may be a critical failure in the radio software. In this case, you can try a full factory reset (Factory ResetThis will delete all your applications, music and tuned radio stations, but may restore the functionality of the camera module.
To reset go to Settings → Restore and reset → Reset settings. Confirm the action and wait for the reboot. After turning on, go through the camera setup procedure again through the factory menu. Often after a reset, the system correctly determines the type of connected device.
In the most difficult cases, when the problem is a software error of a specific firmware version, the only solution is to update MCU or the main Android system. Find the latest firmware specifically for your model on the manufacturer's website or specialized forum (it is important that the board and processor number match) The update must be carried out strictly according to the instructions, usually from a FAT32 format flash drive.
☑️ Checklist of actions when the camera is not working
Frequently asked questions (FAQ)
Why did the camera turn itself over again after setting it up?
This may occur due to unstable power supply. If the voltage sags when starting the engine, the radio may reboot and reset temporary settings. Also check if the contacts in the ISO connector have oxidized.
Is it possible to turn the camera over through a third-party application?
Yes, there are applications like "Rear Camera" from Google Play, but they work. only if the system sees the camera as a USB device. For standard video input (RCA), this method is not suitable, you need superuser rights (Root) and specific software.
Does the length of the video cable affect the quality and flip?
The length of the cable does not affect the orientation of the image, but it does affect the quality of the signal. For analog cameras, it is not recommended to use a longer cable. 5-6 meters without an amplifier, otherwise there will be interference. The digital AHD signal is more stable in terms of length.
What to do if there is no “Camera” item in the menu?
Try to change the region in the radio settings (for example, to “Europe” or “USA”) In some firmware, the camera functions are hidden for certain regions. video input in the settings of the steering wheel buttons or external inputs.
Is it safe to change settings in Factory Settings?
Yes, if you only change parameters related to the camera (Flip, Mirror, Lines) Do not touch the settings of CAN-bus, climate and amplifier control protocols if you do not know exactly what you are doing - this may disrupt the operation of the on-board device. computer.