Steering wheel button control adapter for Audi ACV SWC 42A-1321-008-0

Steering Wheel Control Adapter for Audi ACV SWC 42A-1321-008-0

Maintain the original steering wheel control functions when replacing the factory radio with an aftermarket unit. Depending on the vehicle's equipment, the range of functions, and the software of the newly installed radio, some functions may be limited or replaced by others. Compare the displayed wiring connectors with those in your vehicle to ensure they match both technically and visually. Verify whether any of the listed OEM radios were originally installed. Before final installation, check the functionality of the vehicle, system settings, and proper operation of the steering wheel control (SWC).

Compatible Vehicles

• Audi A2 (8Z) 11/1999 → 07/2005 - original radio Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II 1-DIN with two control knobs.
• Audi A3 (8L) 08/2000 → 06/2003 - original radio Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II 1-DIN with two control knobs.
• Audi A3 (8P) 07/2003 → 05/2005 - original radio Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II 1-DIN with two control knobs.
• Audi A4 (B6/B7) 11/2000 → 02/2009 - original radio Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II 1-DIN with two control knobs.
• Audi A6 (4B/C5) 05/2001 → 03/2006 - original radio Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II 1-DIN with two control knobs.
• Audi TT (8N) 09/1998 → 07/2006 - original radio Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II 1-DIN with two control knobs.

CAN Bus Information

Connectors and Power:

• Connector: ISO / Mini ISO.
• OEM amplifier connection 2-channel / 4-channel via ISO speaker output.
• Blue wire: +12 V REMOTE for amplifier activation.
• Brown wire: GND ground (optional – use if audio output is missing).

Settings:

• Check DIP switches according to the type of aftermarket radio.
• Fine-tune OEM audio system levels for each channel individually.

Diagnostic LED Indication:

• Blue flashing: searching for CAN Bus signal.
• Blue steady: CAN Bus active.
• Red steady: active +12 V ignition current.

Important Additional Information

• Compatible with aftermarket radios Sony, Kenwood, Panasonic, JVC, Pioneer, Blaupunkt, Clarion, Alpine, LG, Zenec, Becker.
• Full activation of the adapter requires ordering a specific brand radio connection cable.

General Installation Guidelines

Pre-Installation Verification:

1. Check all control functions and vehicle settings with the original OEM head unit.
2. Disconnect the original radio (OEM HU) without power.
3. Check all interface connections to ensure they are correctly connected – without power.

Connection and Wiring Sequence:

1. Check interface settings and hardware configuration – without power.
2. Check the connection cable configuration to HU – without power.
3. Connect the cable to the HU as per the aftermarket device manual.
4. Connect other wires as per the device instructions.
5. Connect the entire installation to the vehicle – connect the main power supply last.
6. Perform software configuration of the interface according to the product description or manual.
7. Configure the aftermarket HU (e.g., steering wheel control, camera, hands-free, antenna power).
8. Perform a functional test of the steering wheel control and vehicle communication.

Changing Interface and HU Cable Configuration:

• Make all changes without power.
• Repeat steps 5 to 8 as listed above.

In Case of Interface or Vehicle System Failure:

• Reinstall the original OEM HU.
• Start the original unit.
• Trigger the CAN Bus system shutdown.
• Check the hardware configuration of the interface.
• After CAN Bus shutdown, repeat steps 5 and 6 as listed above.

When Modifying Connections or Wiring:

• All connections and modifications should only be performed by professionally trained personnel.
• All changes must be verified for manufacturer approval or impact on vehicle warranty before connection.
• All modifications must be verified by measurement and comparison with the vehicle's wiring diagram before connection.
• Modifications are made at your own risk, without a guarantee of functionality.
• Modifications are performed at your own risk, without a guarantee against damage to the vehicle, device, or interface.
• Modifications to pre-installed wiring may result in product warranty loss.

Evaluation

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