which fuse for the OBD2 data port?

2010 TOYOTA RAV4
150,000 MILES • 3.5L • 6 CYL • 4WD • AUTOMATIC
Avatar
BRUTOO61
  • MEMBER
  • 3 POSTS
Vehicle OBD system is unresponsive. ECU fuse powers OBD system. The fuse is good and everything is working. Which port on the OBD plug is supposed to be hot?
Dec 10, 2024 at 10:24 PM
Advertisement
Avatar
STRAILER
  • ✓Experienced Mechanic
  • 55,224 POSTS
The two brown wires on the connector are ground so I would check those along with the power source. This guide can help you check the power and ground connections. Also, check for power at the OBD fuse 7.5 amp. The blue wire in the connector is power.

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

Also, check the code reader on another car to make sure it works. Check out the images (below). Let us know how it goes.
Images (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Dec 11, 2024 at 4:12 AM
Avatar
BRUTOO61
  • MEMBER
  • 3 POSTS
Everything checked out okay after cleaning the connector with an electrical cleaner.
Jan 17, 2025 at 11:54 PM
Avatar
STRAILER
  • ✓Experienced Mechanic
  • 55,224 POSTS
So the problem is fixed or?
Jan 18, 2025 at 2:32 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.