MTK 8227L Factory Settings Guide

Click any menu item below to see detailed explanations in plain English

Quick Access Passwords:
Factory Settings: 8888 | Engineering Mode: 26959910 | Boot Logo: 5678

101 - Backup Camera Delay

What it does: Controls how long you need to stay in reverse before the backup camera turns on.

Why it matters: Prevents the screen from switching to the camera if you just tap reverse by accident.

Default: 0.5 seconds

How to adjust: Use the slider to pick anywhere from 0.5 to several seconds.

102 - Mute Settings

What it does: Controls when your audio mutes and how the mute button works.

Settings:

103 - Protocol Settings

What it does: Tells the head unit what kind of car you have so steering wheel controls work.

What to do: Pick your car manufacturer (Hyundai, GM, Peugeot, etc.) and the unit will speak your car's language (CAN bus protocol).

Warning: Some users report this menu kicks them out after opening. If that happens, you may need a CANBUS adapter box.

104 - Reboot

What it does: Restarts your head unit.

When to use it: After changing settings that require a reboot to take effect.

105 - Camera And Protocol Parameter Settings

What it does: Everything related to your backup camera, parking sensors, 360 cameras, and even some car info like AC controls.

Main Features:

This menu has over 26 different options you can scroll through.

106 - Help and Feedback

What it does: Support and feedback interface.

Details to be added.

107 - Protocol Debugging

What it does: Shows you real-time data from your car's computer (CANBUS).

Why you'd use it: To see if your steering wheel controls are working, if the CANBUS adapter is connected, or to troubleshoot car integration issues.

You'll see a black screen with scrolling data. Press a steering wheel button and watch it appear in the log.

108 - Power Amplifier Settings

What it does: Controls how much power goes to your speakers.

Range: 0-100%

Tip: Set it around 50% to avoid distortion. If you set it to 100%, your audio will be too loud and sound bad.

301 - Color Settings

What it does: Adjust your screen's brightness, contrast, color, and saturation.

What you'll see: A picture of an Asian woman - this is your reference image while adjusting colors.

Tip: The screen says "Close the car small light" - this means turn off your dome light (interior cabin light) so you can see the screen clearly while adjusting.
Advanced Access: PIN 1616 gives you detailed brightness/contrast/hue/saturation/tone controls

302 - Production Management

What it does: This is for the factory workers who built your head unit.

Can you access it? No - requires manufacturer account credentials that aren't public.

What it's for: Quality control testing during manufacturing.

303 - Touch Settings

What it does: Calibrate your touchscreen and configure touch buttons.

Main Functions:

Quick Calibration: Put 5 fingers on the screen at once to trigger a fast calibration mode.

304 - Export The Config

What it does: Backs up all your settings to a USB drive.

How it works:

  1. Insert USB drive
  2. Open this menu
  3. Adjust volume, language, Bluetooth name if you want
  4. Click export
  5. Find metazone.bin file on your USB
Important: Always backup before flashing new firmware! This saves all your custom settings.

What's included: Button mappings, touchscreen calibration, volume levels, Bluetooth settings, language.

305 - Direction Control Settings

What it does: Configures how your steering wheel controls talk to the head unit.

Settings:

Note: This is NOT for rotating your screen - it's for steering wheel control hardware.

306 - IR Code Output Settings

What it does: Configure infrared remote control for your steering wheel.

When you'd use it: If you have an add-on IR remote ($10 learning remote) instead of factory steering wheel controls.

Options:

You'll need to use "KEY learning" mode to program the remote buttons.

307 - Encoder Settings

What it does: Configures your volume knob.

Detection Methods:

Direction:

Common Issue: After a crash, volume knob may stop working. You may need a specific key.ini file from your seller to fix it.

308 - Physical Buttons Study

What it does: Teaches the head unit what each physical button does.

How to use it:

  1. Click "start"
  2. Click a button name on screen (power, volume up, home, etc.)
  3. Press the actual physical button
  4. The unit learns which button is which
  5. Repeat for all buttons
  6. Click "save"
When to use: After firmware updates when buttons stop working, or when remapping buttons to different functions.

309 - Tire Pressure Settings

What it does: Set alarm thresholds for tire pressure monitoring system (TPMS).

Requirements: You need external TPMS sensors (USB or Bluetooth).

What you can set:

Configure separately for each tire: left front, left rear, right front, right rear.

310 - Lock Screen Mode Settings

What it does: Controls what the screen shows when you turn off your car.

Options:

Default: Screen off mode

311 - Key Light Settings

What it does: Change the color of your button backlights (if your unit has RGB LEDs).

Controls:

Important: If you see "Please open the debug button lamp lights!!" - your unit only has white LEDs, not RGB. RGB controls won't work on budget units.

701 - USB Settings

What it does: Audio controls, boot logo customization, and USB configuration - all in one menu.

Audio Tab - Volume Controls

6 independent volume sliders (0-30 each):

Audio Tab - Sound Effects

Logo Tab - Custom Boot Logo

How to change your boot logo:

  1. Create folder "Car_Logo" on USB drive root
  2. Put your logo image in there (BMP format, 1024x600 resolution)
  3. Insert USB
  4. Click "Set path" → select Car_Logo folder
  5. Click "Set logo"
  6. Reboot from factory settings (code 8888)
Quick Access: PIN 5678 opens boot logo window directly

Other Tab - USB Configuration

702 - Clear Test File

What it does: Deletes factory test audio and video files.

Why you'd do it: Free up storage space. These test files were used during manufacturing and serve no purpose now.

Warning: This cannot be undone. Files are permanently deleted.

703 - Debug Touch

What it does: Real-time touchscreen debugging.

Features:

When to use: Diagnosing dead zones, calibration issues, or touch accuracy problems.

704 - App Settings

What it does: Control which apps auto-start and how audio works between apps.

Bootup Apps

Pick up to 5 apps to launch automatically when you start your car.

Tip: Fewer auto-start apps = faster boot time. Only pick apps you always use.

Audio Mutex

Controls which apps can interrupt each other's audio.

Common problem: Navigation speaks, radio mutes, radio never comes back on.

Use this to configure which apps can steal audio focus from others.

Navigation Apps

Special settings for navigation app audio behavior.

Settings require restart to take effect.

705 - Touch Test

What it does: Simple fullscreen touch test.

How to use: Touch the screen - see "Please touch the screen to test"

Drag your finger everywhere to find dead zones or unresponsive areas.

706 - Bluetooth Connect Pair Set

What it does: Choose how Bluetooth pairing works.

Options:

Requires restart to take effect.

Change Bluetooth name and password in menu 304.

707 - MCU Info Test

What it does: Tests communication between Android and the MCU (microcontroller that controls car features).

Controls:

When to use: If steering wheel controls aren't working, or after firmware updates.

You'll see serial data scrolling. This shows the Android and MCU are talking to each other.

708 - Engineering Test Debugging

Password Required: 26959910

What it does: Advanced diagnostics and the most important setting - power management.

Power Management (MOST IMPORTANT)

Battery Drain Fix:
Sleep mode draws 5W continuously = dead car battery
Solution: Change to "Direct Shutdown Mode"

Requires reboot after changing.

Audio (Hardware Testing)

Advanced audio controls - set all levels to maximum (10) for best volume, then reboot.

Phone / Connectivity

Diagnostic tools for testing phone connections, WiFi, Bluetooth, cellular.

Alternative Access: Factory Settings (8888) → USB Info → USB → Engineering Mode