Rcd330 | Pinout

The RCD330 (specifically the Desay or Noname versions) is the holy grail for VW owners wanting CarPlay/Android Auto. However, its pinout differs slightly from older RCD/RNS units. Getting the wiring wrong can lead to battery drain, no reverse camera, or a dead unit.

Here is a breakdown of the (Power/Speakers) and the non-standard 8-pin USB/Aux connector. 1. The Main Quadlock Connector (Power & Speakers) The RCD330 uses the standard ISO 10426 Quadlock (Type A, B, C, D blocks). However, B+ (Constant 12V) and CAN bus pins are critical. Block A (Speakers) | Pin | Signal | Notes | |------|-------------------------------|---------------------------| | A1 | Front Right (+) | Grey/White wire | | A2 | Front Right (-) | Grey/Brown wire | | A3 | Front Left (+) | Black/White wire | | A4 | Front Left (-) | Black/Brown wire | | A5 | Rear Right (+) | Violet/White wire | | A6 | Rear Right (-) | Violet/Brown wire | | A7 | Rear Left (+) | Green/White wire | | A8 | Rear Left (-) | Green/Brown wire | Block B (Power & CAN Bus) - Most Important | Pin | Signal | Critical Notes | |------|-------------------------------|-----------------------------------------------------------------------------| | B1 | CAN High | Connects to Powertrain CAN (Not Comfort CAN like older units). | | B2 | CAN Low | Must be twisted pair with B1. Wrong CAN = Battery drain. | | B3 | Illumination | Not used on RCD330 (works via CAN). Do not connect. | | B4 | Mute | Not used. | | B5 | Terminal 58d | Not used (CAN controlled). | | B6 | Terminal 15 (Ignition) | Not needed for RCD330 (uses CAN wake-up). | | B7 | GND (Ground) | Brown wire. Must be solid chassis ground. | | B8 | B+ (Constant 12V) | Red/Black wire. Always live. | Rcd330 Pinout

| 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 (specifically the Desay or Noname versions)