What fuse or where my ob2 port draws power from in my car?

2003 INFINITI G35
150,000 MILES • 3.5L • V6 • 2WD • MANUAL
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EBALES
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My ob2 port is not working.
Sep 1, 2024 at 5:21 AM
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AL514
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Hello, the Data Link Connector (DLC) for this vehicle has 2 ports which supply power, pin 16 and pin 8, Ill post a wiring diagram that shows the 2 fuses that power those two ports, pin 4 and 5 are both Grounds. Pin 16 should have power even if the key is Off (so Hot at all times) and pin 8 needs the key to be on for power. Did you check these with a multimeter or just do not have communication with a scan tool?
Sep 1, 2024 at 9:13 AM
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AL514
  • ASE Certified Mechanic
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  • ASE Certified Mechanic
Here is the top half of the Data Bus wiring diagram showing the two power locations for the DLC. Pin 16's fuse is in the fuse panel that is behind the left (driver side) lower kick panel, so down near where your left foot would be, you will most likely have to remove the kick panel, or there might be an access cover, I will look to see if there is a picture of it. But pin 16 provides power to most scan tools, but the grounds at pin 4 and 5 are required as well. When testing with a multimeter just don't spread the pins inside the DLC.
Sep 1, 2024 at 9:23 AM
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AL514
  • ASE Certified Mechanic
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  • ASE Certified Mechanic
Here is the pinout of the DLC.
Let us know what you find.

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

https://www.2carpros.com/articles/how-to-use-a-voltmeter
Sep 1, 2024 at 9:32 AM
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