OBD Port not working

1999 NISSAN SENTRA
3,000,000 MILES • 1.6L • 4 CYL • 2WD • AUTOMATIC
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DON EDENFIELD
  • MEMBER
  • 1 POST
My OBD Port is not working.
Apr 17, 2022 at 5:51 PM
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JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 POSTS
Hi,

First, I need you to check fuse 15 in the interior fuse panel. If it is good, confirm it has power to and from it. Here is a link you may find helpful:

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

If it is good, I need you to go to the OBD port and check for 12v at pins 1 and 16. Additionally, confirm pins 12 and 13 have continuity to ground.

Here is a link you may find helpful:

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

I attached a wiring schematic of the circuit below and a pic identifying each pin number.

Let me know what you find.

Take care,

Joe

See pics below.
Apr 17, 2022 at 10:34 PM