Follow this straightforward guide to get your ELM327 interface communicating perfectly with your car. 1. Identify Your COM Port

Before walking to the car, click the button in the Multiecuscan settings.

Windows often defaults to high latency for serial ports, which is incompatible with the real-time requirements of vehicle diagnostics. : Plug the USB cable into your laptop.

If you're using MultiECUScan with an Elm327 adapter, you'll need to configure the port settings to connect to your vehicle's ECU. Here are the steps to follow:

| Setting | Value | Why for 2021 | |---------|-------|---------------| | Bits per second | | Default for MES (38400 too slow for 2021 CAN logs) | | Data bits | 8 | Standard | | Parity | None | Standard | | Stop bits | 1 | Standard | | Flow control | None | Hardware flow control breaks MES timing |

This guide covers the necessary settings to connect with an ELM327 interface for Fiat, Alfa Romeo, Lancia, and Abarth vehicles produced up to around 2021.

Right-click the Windows Start button and select .