MG4 Secret Menu Mode...

I know there are sone guys here who turns on USB OTG on MG4 Luxury/Thropy. Can someone share how to do it basicalpy with a bit instrucrions? Thanks
 
Further to your query... checking via the ChatGPT MG4 Tech Assistant...

Does the mg4 support usb OTG?
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The MG4 supports USB storage devices for music and video playback, as well as USB connections for Apple CarPlay and Android Auto.


However, the manuals do not mention USB OTG (On-The-Go) host functionality, such as connecting USB peripherals (e.g. keyboards, controllers, or other USB devices). The system is designed to recognize:


  • USB flash drives (for media playback and system updates).
  • Smartphones (for Android Auto / Apple CarPlay).

There is no official support for OTG connections to arbitrary USB accessories.


👉 If you want, I can check whether the infotainment hardware has hidden engineering functions that might expose OTG (since some service manuals describe USB update and engineering modes). Would you like me to investigate that?

I checked the engineering and service manuals for the MG4, and here’s what I found:


  • The USB ports in the MG4 infotainment system are used for:
    • Playing media from a USB storage device.
    • Running software/firmware updates via USB flash drives.
    • Smartphone integration (Apple CarPlay / Android Auto).
  • To perform updates, the infotainment system has an engineering mode, which you access by tapping the software version number multiple times and entering a password (200519 or ##4479#* depending on the module). In this mode you can select “USB upgrade” to refresh infotainment or TBOX software.

⚠️ However, nowhere in the manuals is there support for USB OTG (On-The-Go) host mode, i.e. the ability to connect and use arbitrary USB peripherals like keyboards, controllers, or external hard drives. The USB port only recognizes flash drives and smartphones for the supported functions.


👉 So:


  • Yes → USB can act as a host for firmware updates and media storage.
  • No → There is no documented OTG support for general USB peripherals.
 
What is it do about USB OTG? Do you even know what it is used for?
OTG is just the process where a device, such as the MG's infotainment system, can be connected to a computer via a USB cable and then viewed as disk storage. This then allows files to be directly uploaded or downloaded via the computer's standard applications.

You likely use OTG without thinking about it if you connect your phone or digital camera to your PC to access images. Even the humble flash drive is just an OTG device
 
To be honest, that is not the definition I understand for OTG - On The Go. 🤷‍♂️

To me, OTG is a means of connecting external devices to the phone/tablet/car, not connecting the phone/tablet/car to a PC. In other words, OTG is the means of connecting external storage, a mouse, a keyboard, etc. to the phone/tablet/car.

There may be similarities (i.e. they both involve using the USB port) but they're not the same thing.
 
But, the car infotainment system has data storage, and so it is a device that can be connected as storage to any other device that accepts storage.
 
But, the car infotainment system has data storage, and so it is a device that can be connected as storage to any other device that accepts storage.
Correct - but that is not my understanding of OTG; that's just attached storage. WiKi says:

USB On-The-Go is a specification that allows certain USB devices, such as tablets or smartphones, to function either as a host or a peripheral. This enables them to connect directly to other USB devices, such as flash drives, digital cameras, mice or keyboards. USB OTG was first introduced in late 2001. Unlike standard USB connections, which involve a fixed host and a peripheral, USB OTG allows a device to switch between these roles
 
Correct - but that is not my understanding of OTG; that's just attached storage. WiKi says:
Rather than copying info around you can see the detail here


If you insert a USB drive into the infotainment system's USB port, the infotainment system will recognise it as a storage device and scan it for content such as music and videos. On the other hand, if you use an OTG cable and connect the infotainment system to a computer (including a phone), it will configure itself as a storage device, allowing files to be transferred.
 
Just discovered this thread and must say it's quite interesting.

Has anyone tried connecting directly to the system yet? I don’t mean accessing it via the two USB ports in the center console, but rather by removing the glovebox and all the plastic panels in the passenger footwell to take a look at the computer in its enclosure. Is there some kind of port there that you could connect to in order to gain access to the system?
 
Just discovered this thread and must say it's quite interesting.

Has anyone tried connecting directly to the system yet? I don’t mean accessing it via the two USB ports in the center console, but rather by removing the glovebox and all the plastic panels in the passenger footwell to take a look at the computer in its enclosure. Is there some kind of port there that you could connect to in order to gain access to the system?

What kind of system access do you really want? We can already install apps and get into the android system. What more would you really want at that point?
 
What kind of system access do you really want? We can already install apps and get into the android system. What more would you really want at that point?
Honestly, I don’t need new apps and stuff like that. All I want is my one Pedal Drive to be enabled by default and my LKA to be disabled by default 😂
 

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