Cannot connect the scan to my car

Tiny
JAKE09
  • MEMBER
  • 2007 SUBARU LEGACY
  • 2.5L
  • 4 CYL
  • TURBO
  • 4WD
  • AUTOMATIC
  • 160,000 MILES
I tried to connect to read my check engine code, but it does not want to connect. I tried with two scanners and still does not want to connect.
Monday, January 7th, 2019 AT 9:30 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,867 POSTS
Hi and thanks for using 2carpros.com

What I need you to do is first check for power to the DLC as well as ground. On any DLC connector I have ever seen, pin 16 is battery voltage. That is industry standard. So, with a test light, confirm that it is getting power. Pin 8 is powered when the key is on.

Now, Pin 4 is chassis ground and 5 is signal ground. Test for continuity between those pins and a known ground.

I attached pics of the wiring of the DLC and added another pic of the power supply fuses. If there is no power to the aforementioned pin (16) check fuses.

Here are a couple links that you may find helpful.

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

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

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

Let me know what you find.

Joe
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Monday, January 7th, 2019 AT 6:42 PM

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