ATOCOTO MC-20218

ATOCOTO Car DMC Digital Bluetooth 5 USB AUX Adapter

Model: MC-20218

Introduction

This manual provides detailed instructions for the installation and operation of your ATOCOTO Car DMC Digital Bluetooth 5 USB AUX Adapter. This device integrates Bluetooth hands-free calling, wireless audio streaming (A2DP), and USB/AUX input capabilities into your vehicle's original factory stereo system. Please read this manual thoroughly before installation and use to ensure proper functionality and safety.

ATOCOTO Car DMC Digital Bluetooth 5 USB AUX Adapter with microphone and cables, shown connected to a car radio.
Figure 1: ATOCOTO Car DMC Digital Bluetooth 5 USB AUX Adapter components and example installation.

Compatibility

This adapter is designed for specific Subaru vehicle models and head units. Ensure your vehicle and head unit are listed below for proper functionality.

Supported Subaru Vehicle Models (2004-2014)

  • Subaru Forester (2004-2010)
  • Subaru Outback (2004-2010)
  • Subaru Tribeca (2004-2010)
  • Subaru Legacy (2004-2010)
  • Subaru Impreza (2004-2010)
  • Subaru XV (2011-2014)

Note: Compatibility is only guaranteed in combination with one of the supported car radio/navigation systems listed below.

Supported Head Units

  • Kenwood: GX-201 JE, GX-201 JH, GX-201 KE, GX-201 RH, GX-201 KH, GX-201 LE, GX-201 LEF2, GX-201 LH, GX-201 SH, GX-203 JE, GX-203 KH, GX-204 JH, GX-204 LE, GX806EF2
  • Panasonic Tribeca: P-136 6-disc MP3, P-141 6-disc MP3, P-146LS 6-disc MP3
  • Clarion: PF2984BA (Subaru Forester, supports control via steering wheel buttons)
Various Subaru car radio head units compatible with the adapter.
Figure 2: Examples of compatible Subaru head units.

Features

  • Multiple Audio Inputs: Supports USB, AUX, or AUX MIC input.
  • Bluetooth 5.0: Integrated Bluetooth for hands-free calling (HFP) and wireless audio streaming (A2DP).
  • Hands-Free Calling: Answer or reject calls by pressing track +/- buttons on your car stereo.
  • Easy Installation: Direct plug-and-play design.
  • Robust Design: Vibration and interference proof for stable performance.

Important Note on USB: The USB slot is exclusively for playing MP3 files from a USB stick or flash drive (8GB to 128GB supported, not included). It is NOT for charging your phone or playing music directly from a phone via USB.

Package Contents

Please verify that all items are present in your package:

  • Digital Changer (Main Adapter Unit)
  • Microphone
  • 3.5mm Extension Cable
All components included in the ATOCOTO Car DMC Digital Bluetooth 5 USB AUX Adapter package.
Figure 3: Contents of the product package.

Specifications

ParameterValue
Voltage Input12V DC
Signal-to-Noise Ratio>90dB
Max. Current600mA
Max. Voltage Output12V
Total Harmonic Distortion<0.05%
Frequency Response20Hz~20kHz ±2dB
Working Temperature-10°C to 80°C
Music Format SupportMP3 (8-320kbps), WMA (8-320kbps)
Item Weight150g
Item Size23cm (cable length/overall dimension)
InterfaceBluetooth, 10+10 Pin Connector
MaterialPlastic + Metal

Setup and Installation Guide

Follow these steps carefully to install your adapter:

  1. Power Off Vehicle: Ensure your car's ignition is off and the battery is disconnected to prevent electrical damage.
  2. Remove Car Radio: Carefully remove your car's head unit from the dashboard. Consult your vehicle's service manual if you are unsure how to do this.
  3. Locate iP-Bus Port: Identify the iP-Bus port at the back of your car radio. This is typically a 10+10 Pin connector.
  4. Connect Adapter: Plug the main adapter unit's connector into the iP-Bus port on the back of the radio.
  5. Connect Microphone (for Bluetooth): If you plan to use the Bluetooth hands-free function, plug the included microphone into the designated MIC port on the adapter. Route the microphone cable to a suitable position (e.g., near the sun visor or steering column) for optimal voice pickup.
  6. Connect External Devices (Optional): If using an iPod/iPhone via cable or an AUX device, connect it to the respective port on the adapter.
  7. Secure Wiring: Ensure all cables are securely connected and routed to avoid interference or damage.
  8. Reinstall Radio: Carefully reinstall the car radio into the dashboard.
  9. Reconnect Battery: Reconnect your car's battery.
Close-up view of the ATOCOTO adapter unit and its connection cables.
Figure 4: Main adapter unit and connection cables.
Detailed view of the 10+10 Pin connector for the car radio.
Figure 5: The 10+10 Pin connector.
The adapter connected to the back of a car radio, showing the iP-Bus port connection.
Figure 6: Adapter connected to a car radio.
Generic diagram illustrating the adapter's interfaces (USB, SD Card, AUX In/Microphone) and its connection to a head unit.
Figure 7: Adapter interfaces and general connection diagram.

Operating Instructions

Activating the Adapter

  1. Turn on your car's ignition and the car radio.
  2. Press the 'CD/AUX' button on your car radio to switch to the adapter's input mode. The radio display should indicate activation of the CD changer or AUX input.

Bluetooth Operation

  1. Pairing: On your mobile device, enable Bluetooth and search for available devices. Select the adapter (usually named 'BT' or similar) to pair.
  2. Hands-Free Calling: When a call comes in, the device will automatically switch from the current audio mode (e.g., USB, AUX) to Bluetooth mode. Press the 'TRACK +/-' buttons on your car stereo to answer or end the call. After the call, audio playback will resume automatically.
  3. Audio Streaming (A2DP): Once paired, you can stream music wirelessly from your mobile device to your car stereo. Control playback (play/pause, next/previous track) using your mobile device or the 'TRACK +/-' buttons on your car stereo.

USB Playback

  1. Prepare USB Stick: Copy MP3 or WMA audio files to the root directory of a USB stick (8GB to 128GB).
  2. Insert USB Stick: Insert the USB stick into the USB interface on the adapter.
  3. Playback: The adapter will automatically detect and play audio files from the USB stick. Use the 'DISC +/-' buttons to navigate between virtual folders (CD1, CD2, etc.) and 'TRACK +/-' to change tracks within a folder.
Diagram showing USB stick file organization for playback, with MP3 files in the root directory defaulting to CD1.
Figure 8: USB stick file structure for music playback.

AUX Input

Connect any audio device (e.g., MP3 player, smartphone) to the 3.5mm AUX input port on the adapter using the provided extension cable. Select the AUX input mode on your car stereo to listen to audio from the connected device. Playback control will be managed directly on the connected device.

Troubleshooting

ProblemPossible CauseSolution
No power/Adapter not recognizedIncorrect connection to iP-Bus port; Vehicle not powered off during installation.Ensure all connections are secure. Disconnect car battery, re-check connections, then reconnect battery. Verify head unit is compatible.
No audio outputIncorrect source selected on radio; Volume too low; Faulty cable/USB stick.Press 'CD/AUX' button to select the correct input. Increase volume on both radio and connected device. Test with a different USB stick or AUX cable.
Bluetooth not pairing/connectingAdapter not in pairing mode; Bluetooth disabled on phone; Interference.Ensure adapter is powered on and in discovery mode. Restart phone's Bluetooth. Move phone closer to the adapter.
USB playback issues (e.g., not playing, skipping)Unsupported file format; USB stick not formatted correctly; USB stick capacity too large/small.Ensure files are MP3 or WMA. Format USB stick to FAT32. Use a USB stick within the 8GB-128GB range. Ensure files are in the root directory.
Microphone not working for callsMicrophone not connected; Microphone placed incorrectly.Ensure microphone is securely plugged into the adapter. Reposition microphone closer to the driver for better voice pickup.

User Tips

  • USB Stick for Music: Remember that the USB port is strictly for playing MP3/WMA files from a USB flash drive. It cannot be used to charge your phone or play music directly from a phone's storage.
  • File Organization: For USB playback, place your MP3/WMA files directly in the root directory of the USB stick. The adapter will typically assign these to 'CD1'. If you create folders, they may be recognized as 'CD2', 'CD3', etc.
  • Microphone Placement: For the best hands-free call quality, position the microphone in a clear, unobstructed location, such as clipped to the sun visor or near the instrument cluster, away from air vents.

Maintenance

To ensure the longevity and optimal performance of your ATOCOTO adapter, follow these simple maintenance guidelines:

  • Keep Dry: Avoid exposing the device to moisture or liquids.
  • Clean Gently: Use a soft, dry cloth to clean the adapter. Do not use harsh chemicals or abrasive cleaners.
  • Avoid Extreme Temperatures: Do not expose the device to extremely high or low temperatures, as this can affect its electronic components.
  • Check Connections: Periodically check that all cables are securely connected, especially after driving on rough terrain.

Warranty and Support

For any technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact the seller or ATOCOTO customer support directly. Keep your purchase receipt as proof of purchase.

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