For further information and technical details, refer to the following resources:
The Quadlock is a large, square plug divided into four distinct sections. Each section handles a different vital sign of the car’s ecosystem. The Power Block (Section A)
The RCD330 reads steering wheel commands via the CAN High and CAN Low pins mentioned above. If your buttons aren't working: Ensure the pins are securely seated in the Quadlock.
Your right-side steering wheel buttons (voice, track skip) don't work. Solution: The RCD330 uses CAN bus for MFSW. No extra wires are needed if your car has a compatible steering wheel control module (SWCM). For older cars (pre-2005), you need a CAN bus adapter (like Connects2 or PAC) that translates analog SWC into CAN messages. These adapters tap into the Quadlock’s CAN pins (A9, A10).
| Pin | Signal | Wire Color (Typical OEM harness) | |------|--------------------------|----------------------------------| | 1 | USB 5V (Power) | Red | | 2 | USB D- | White | | 3 | USB D+ | Green | | 4 | USB ID (For OTG/CarPlay) | Yellow (Crucial for iPhone) | | 5 | AUX Left | Blue | | 6 | AUX Ground | Shield/Bare wire | | 7 | AUX Right | Orange | | 8 | USB GND | Black |
The RCD330 is the legendary "brain transplant" for older Volkswagen cars, bringing modern features like CarPlay and Android Auto to aging dashboards. To get it working, you have to understand the language it speaks through its back panel: the Quadlock connector.