CanDo OBD Aid is more than just a breakout-box; it is ideal for diagnosing and identifying OBDII-related errors while communicating with a diagnostic scan tool. The display helps by monitoring the voltage supply and indicates if low battery power is an issue. It features a "quick test," which will individually diagnose each pin of the OBDII port. The data saver cable comes with surge voltage protection, short circuit and polarity protection. The OBD Aid is a fast and easy way to properly check a 16-Pin DLC port prior to scan tool communication or ECU flashing.