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Check engine light is on but cannot retrieve codes

Tiny
LEAVEIT2ME
  • MEMBER
  • 2004 LINCOLN AVIATOR
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 93,000 MILES
Engine running rough. I've tried collecting engine codes but the OBD II will not read them. Power comes on automatically when connected to the data link connection plug and I've checked the fuse. The unit says to check the connection. I've done that more than several times. I've even had both O'Reilly's and Autozone try and have had no luck. No one seems to have any answers.
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Monday, September 14th, 2015 AT 4:13 PM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
You will have to check the power wire for a short in wire then or have a local pro do it.
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Wednesday, September 16th, 2015 AT 7:57 AM
Tiny
LEAVEIT2ME
  • MEMBER
  • 2 POSTS
Thank you for your timely response.

Can you tell me which wire that would be in the data link connector or can you refer me to a wiring diagram? I have a Haynes manual but it's very basic and doesn't label the individual wires of the connector.

Thank you once again,
Brad Roen
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Wednesday, September 16th, 2015 AT 10:55 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
See pic also pins number 2 & 10 but if connection pin is bad that will need to be replaced. Also check grounds with ohm meter so you don't have to trace wires.
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Wednesday, September 16th, 2015 AT 12:04 PM

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