Test DLC (OBD port) for any abnormalities, such as shorting and reverse polarity at the pins before connecting other diagnostic equipment to DLC.
Provides a live display of communicating signals (eg. communication protocol signals) on assigned pins for quick pointing of faults without having to bring out a measurement tool (digital volt ohmmeter)
Quickly access all 16 pin connections during repair and diagnosis of the vehicle
Monitor the input voltage of the OBD during module programming with the low voltage alarm