AUTOOL OBD2 Breakout Box OBD-II Protocol Detector with OLED Screen and 120Ω CAN Terminator

AUTOOL OBD2 Breakout Box is a handheld OBD-II protocol detector and ECU connector that lets technicians monitor power, ground and communication lines while adding flexible outputs and a selectable 120Ω CAN termination.

This compact diagnostic adapter gives clear, live visibility into an OBD-II port: protocol type, voltage on each pin, power/ground status and CAN bus termination — all while providing multiple output jacks for simultaneous tools. Designed for workshop troubleshooting, bench ECU work and vehicle integration tests, the unit combines LED indicators, an OLED readout, banana-plug outputs and a reinforced TPU cable to maintain signal integrity across a wide input voltage range.

How does the AUTOOL Breakout Box show which protocol the vehicle uses?

The device automatically recognizes major OBD-II communication standards and displays relevant status information so you can confirm protocol before connecting specialized tools. This prevents incompatible tool connections and speeds up diagnostics.

• Detects SAE-J1850, ISO 9141-2, ISO 14230-4 and CAN (ISO 15765-4).
• OLED screen shows active protocol and pin voltages in real time.
• LED array visualizes power and ground availability at a glance.
• Quick protocol confirmation reduces trial-and-error with scanners.

Can I monitor individual OBD-II pins and measure voltages?

Yes — the built-in OLED display and up/down controls let you cycle through live voltage readings for each pin while LEDs report power and ground states. This makes it easy to spot wiring faults, intermittent supplies or incorrect pin assignments without additional meters.

• OLED shows per-pin voltage values; navigation keys select pin view.
• LED indicators for power, ground and communication presence.
• Supports voltage inputs from 6V to 30V for varied vehicle types.
• Useful for quick electrical checks and pre-scan verification.

What expansion and connection options does the box provide?

The breakout box includes multiple 4mm banana-jack outputs so several devices can tap the vehicle bus simultaneously — useful for data loggers, navigation devices or bench ECU testing. Each port can feed a different instrument while preserving the original data link for the vehicle.

• Multiple 4mm banana-plug input jacks for flexible hookups.
• Separate output ports to connect diagnostic tools, recorders or navigation units.
• Durable TPU extension cable for stable, multi-threaded data transmission.
• External DC input for backup battery to power an ECU during bench work.

How does the unit support CAN bus testing and ECU bench work?

The breakout box offers a manual 120Ω termination jumper to add proper CAN bus termination when ECUs are removed from a vehicle, enabling accurate data acquisition on the bench. A DC power input also lets you supply external power to the control unit, preventing loss of data or unexpected ECU behavior during diagnostics.

• Manual 120Ω termination mode for CAN bus stabilization during bench tests.
• DC power port accepts external backup batteries to maintain ECU power.
• Helps prevent communication dropouts and data corruption during repairs.
• Streamlines advanced diagnostics and module programming workflows.

Who this product is for: professional technicians, automotive electricians, ECU reprogrammers and advanced DIYers who need clear, real-time visibility into OBD-II ports and the flexibility to connect multiple devices at once. If you perform vehicle diagnostics, bench ECU testing or integrate aftermarket systems, the AUTOOL OBD2 Breakout Box provides the protocol detection, pin-level monitoring and robust connections required to work faster and with greater confidence. The unit is backed by a three-year warranty and lifetime technical support for long-term workshop use.