Automotive OBDII Protocol Monitor – Breakout Box The automotive OBDII protocol monitor is a professional diagnostic accessory designed to give technicians and enthusiasts fast, safe, and convenient access to the vehicle's OBDII connector for monitoring electrical signals, power supply, and ground connections. Ideal for troubleshooting and verifying OBDII communication, this tool ensures accurate diagnostics while protecting vehicle systems from damage. Key Features and Benefits: Easy Access to OBDII Signals Quickly connects to the vehicle's OBDII diagnostic link connector, allowing you to monitor protocol signals, power, and ground conditions without dismantling wiring or risking connector damage. LED Status Indicators for Quick Diagnostics Equipped with colorcoded LEDs that clearly identify the status of each critical pin: Yellow LEDs (pins 2, 6, 7, 10, 14, 15) light up during active communication between the scan tool and the vehicle, showing waveform signal presence. Green LEDs (pins 4 and 5) indicate a normal ground connection. Red LED (pin 16) confirms proper power supply from the vehicle. 16Pin Complete OBDII Interface Layout Fully simulates the standard 16pin arrangement of the OBDII connector, enabling efficient access to each pin for targeted measurement. This ensures every possible signal can be checked while maintaining communication with the scan tool. Safe 4mm Banana Sockets Includes safety banana sockets compatible with all 4mm banana plugs, including those with safety sheaths. This allows secure connection to multimeters or oscilloscopes for deeper investigation when abnormal signals are detected. Practical Applications: 1. Troubleshooting communication failures between a vehicle's ECU and diagnostic tools. 2. Identifying intermittent power or ground faults that can cause scan tool errors. 3. Performing waveform analysis with an oscilloscope to diagnose signal integrity issues. Specifications: Interface type: Standard OBDII 16pin breakout layout LED indicators: Yellow (signal), Green (ground), Red (power) Socket type: 4mm safety banana sockets Compatible tools: Multimeters, oscilloscopes, OBDII code readers, scan tools The automotive OBDII protocol monitor breakout box is built to provide clear, immediate feedback on vehicle diagnostic connections, enhance troubleshooting accuracy, and make testing faster and safer—all without altering or damaging the original wiring.