This tester is great for testing the OBD2 port on the vehicle. It will automatically test for power and grounds (pin 16 and Pins 4 & 5 respectively) as well as monitor for shorts or opens on all of the other pins. This tester checks for reversed polarity and for transient spikes that may damage your scan tool. This tester also monitors for and will alert you to a low voltage condition at the connector.
Manufacturer warranty: One year