OBD2 port not communicating

Hi and thanks for using 2CarPros.com.

As you mentioned, there are a few things which can cause this issue. However, most commonly, it is a power supply or ground issue. Since the vehicle is so new, I have a feeling it is a power issue (blown fuse). The following directions look more difficult than they are.

The best way to check this is to determine if there is power to the unit as well as ground. As mentioned, those are the two most common problems. I will need you to check pins 4, 5, and 16. See picture one of the data link connector (DLC). The DLC is located in the vehicle. The picture identifies the pins you will be checking.

Pins 4 and 5 are ground pins. You will need to use an multi-meter to check for continuity/ohms of resistance (ground). To get an accurate reading, it is recommended that you disconnect the negative battery terminal prior to checking ground. Once you finishing checking, reconnect the battery. Here is a link that shows how to use a multi-meter:

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Here is a link for testing wiring:

https://www.2carpros.com/articles/how-to-check-wiring

If the grounds seem good (less than 3 ohms of resistance) move to checking for power.

Next, you will need to check pin 16 for power. It should have greater than 11v. You have two choices. You can check it with a test light or using the multi-meter. Here is a link that describes how to use a test light:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

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If there is no power to pin 16, check fuse 73 in the fuse box located in the vehicle. I have attached pictures (2, 3, 4) of the fuse box and its legend. If the fuse is bad, replace it with the same amperage (5 amp) fuse that is presently being used and identified in the attached pictures.

https://www.2carpros.com/articles/how-a-car-fuse-works

https://www.2carpros.com/articles/how-to-check-a-car-fuse

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If there is a problem with the ground, let me know. I will provide wiring schematics of ground locations and how to repair.

Also, the last picture indicates where the DLC is located under the dash on the driver's side of the vehicle. Please note: To ensure you get an accurate reading when checking for ground, you must disconnect the negative battery terminal prior to checking. If the resistance in either pin exceeds 3 ohms, there is a ground issue.

Finally, make sure the aforementioned pins are in good condition, not damaged, pushed inward or bent.

Let me know what you find. I hope this helps.

Take care,
Joe