How to use an OBD2 scan tool

The picture to the left shows an Innova scan tool that has a wired connection. The wired connection from the scan tool connects to the data link connector (OBD2 port).

Note: Even without batteries, the scan tool will automatically power on through the vehicle's accessory fuses when connected to the OBD2 port.

This is a 16-pin connector located on the left side of the driver’s dashboard underneath the steering column.

Note: Need help locating your OBD2 port? You can click HERE to access our OBD2 Port Locator.

Now that the wired scan tool is connected to the OBD2 port, you'll need to turn the ignition to the ON or IDLE position. This needs to be done for the scan tool to establish communication with the vehicle's computer. The scan tool will automatically pick up the vehicle's VIN #, then connect to the vehicle's computer to read and display your diagnostic trouble codes.

Note: You can have the engine running when using our scan tools. Some of our scan tools have advanced features that require the engine to be running. Make sure if you have the engine running, always get the engine running 1st, then connect the scan tool 2nd.

Once the scan tool has established communication successfully, the check engine diagnostic trouble codes will display right away on the display screen. The check engine codes are listed in order by severity. The check engine codes will provide a description of what they mean. Press the UP ▲ or DOWN ▼ buttons to navigate through the remaining codes if more than one are present.

Press the System Status button on the left side of the scan tool to access further diagnostic trouble code options.