Connecting an OBD2 scanner to a Ferrari 355 can be confusing, especially for UK owners. Unlike US models, European versions don’t have a standard OBD2 port. This post clarifies the “Branchement Obd2” process for a UK Ferrari 355.
The original poster attempted to wire an OBD2 socket based on a US wiring diagram but encountered issues. This isn’t surprising, as European 355s utilize a different diagnostic system. While US models have a standardized OBD2 port located under the dash, UK/European models rely on a 3-pin connector.
This 3-pin connector interfaces with the factory diagnostic computer. Different systems, such as ABS and climate control, have their own dedicated 3-pin connectors, even on OBD2 compliant cars. For the Motronic engine control unit in a European 355, the diagnostic connector is typically found behind the driver’s seat, not the passenger seat as sometimes assumed.
A successful “branchement obd2” solution involves using a specific diagnostic cable adapter designed for Fiat, Alfa Romeo, and Lancia vehicles. This adapter connects to the 3-pin connector on the 355 and allows communication with a standard OBD2 scanner. Alternatively, sourcing the 3-pin connector and wiring directly from a salvage vehicle can also work, as confirmed by the original poster. This requires connecting the three wires from the connector to the console and ensuring a proper 12V power supply.
Ultimately, accessing diagnostic information on a UK Ferrari 355 requires a different approach than simply plugging into a standard OBD2 port. Using a suitable adapter or directly connecting to the 3-pin Motronic connector offers effective “branchement obd2” solutions for these vehicles.
