Developer MZULALI has introduced xj-scanner, an open-source project designed to integrate AI agents with 1994 Jeep Cherokee vehicles. The system allows users to connect AI models like Claude Code or Codex to the car to monitor sensor data, read diagnostic trouble codes, and maintain trip logs.
The hardware setup utilizes an Arduino Nano board connected via three wires to the vehicle's under-hood diagnostic port. The board acts as a bridge, translating SCI interface signals from the car's OBD1 engine control unit into USB data for a laptop. A Python script handles command execution and data decryption.
The AI agent manages the diagnostic process through a command-line interface, logging results into CSV files. Monitored metrics include coolant temperature, throttle position, battery voltage, and oxygen sensor readings. The system also supports triggering mechanical tests for fuel pumps, injectors, and ignition coils.
The project is compatible with Jeep and Chrysler models from 1991 to 1995 equipped with SBEC engine control units. The hardware components cost approximately $15, excluding the laptop. The source code and documentation are available on GitHub under the GPLv3 license.
