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Block C is used to interface with the factory external CD changer or modern digital Bluetooth/USB emulators. CDC Data Line Pin 14: CDC Data Ground Pin 15: CDC Permanent +12V Supply Pin 16: CDC Switched +12V Supply Pin 17: CDC Audio Ground Pin 18: CDC Audio Left Channel Pin 19: CDC Audio Right Channel 3. Bench Testing and VIN Coding (Anti-Theft System) siemens vdo rd3 01 service manual full
Block A (Power & Data) Block B (Speakers) +-------------------+ +-------------------+ | 1 | 3 | 5 | 7 | | 1 | 3 | 5 | 7 | |-----+-----+-----+-----| |-----+-----+-----+-----| | 2 | 4 | 6 | 8 | | 2 | 4 | 6 | 8 | +-------------------+ +-------------------+ Block A (Power) Mute (Telephone) Pin 2: VAN Bus Data (Data) Pin 3: VAN Bus Data B (Data B) Pin 4: Permanent +12V Battery (Memory) Pin 5: Auto-Antenna / Amplifier Remote Output (+12V) Pin 6: Ignition / Switched +12V (or VAN-bus wake-up) Pin 7: Main +12V Accessory Power Pin 8: Ground (GND) Block B (Speakers) Pin 1 / 2: Right Rear (+ / -) Pin 3 / 4: Right Front (+ / -) Pin 5 / 6: Left Front (+ / -) Pin 7 / 8: Left Rear (+ / -) Block C (Changer / Aux Expansion)
The Siemens VDO RD3-01 (PU-2471A) service manual outlines key technical specifications, including DSP chipset usage and Mini ISO connector pinouts for Peugeot and Citroën vehicles. It provides crucial information for repairs, such as TDA8579 line receiver troubleshooting and instructions for modifying inputs to support external audio devices. For comprehensive technical documentation, refer to the resources at Repair Wiki Repair Wiki If you need help with a specific part
Note: Navigation and vehicle bus (CAN/VAN) pins are on C connector (not ISO standard).
The aux function will not work immediately. You must use Diagbox/Lexia diagnostics to change the BSI configuration from "CD Changer: Absent" to "CD Changer: Present." This instructs the head unit to open up the audio input channels on Block C when the "Source" button is pressed. CDC Data Line Pin 14: CDC Data Ground
To safely service the internal printed circuit board (PCB), follow this strict disassembly sequence to avoid damaging surface-mount devices (SMD):
| Pin | Connector A (Power/Speakers) | Connector B (Vehicle Network) | | :--- | :--- | :--- | | 1 | Right Rear Speaker (+) | K-Line Diagnostic (ISO 9141) | | 2 | Right Rear Speaker (-) | Switched +12V (Accessory) | | 3 | Right Front Speaker (+) | Vehicle Speed Sensor (VSS) - For GALA | | 4 | Right Front Speaker (-) | Illumination dimmer control | | 5 | Left Front Speaker (+) | Permanent +12V (Memory backup) | | 6 | Left Front Speaker (-) | Left Rear Speaker (+) | | 7 | Left Rear Speaker (+) | Left Rear Speaker (-) | | 8 | Left Rear Speaker (-) | Ground (Chassis) | | Note: Pin 5 (Conn B) is often missing in aftermarket harnesses, leading to code request every startup. |
This is arguably the most complex and unique challenge associated with the Siemens RD3-01. Unlike many other car radios that use a simple numerical security code, the RD3-01 uses a system called . In this system, the radio is "married" to the specific vehicle's engine control unit (ECU) via the car's unique VIN number.