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No communication

Tiny
BLEACHERBUM
  • MEMBER
  • 2005 GMC YUKON
Computer problem V8 Two Wheel Drive Automatic

Service engine light is on and the shop is unable to connect their diagnostic computer to my truck it will not comunicate with my truck. What could be the problem?
Thursday, October 1st, 2009 AT 2:04 PM

4 Replies

Tiny
BIG BODIE
  • MEMBER
  • 1 POST
If when they hook up their scan tool and the scan tool doen't even light up, then the cigarette light fuse is blown. That's where the OBD connector get's it's 12VDC. Replace the fuse and try again.
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Thursday, October 26th, 2017 AT 11:02 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,904 POSTS
So right, check the fuse and then clean the ALDL connector they get corrosion on them becasue they hang down.

Great addition to this thread! Please feel free to help out whenever you are on the site :)

Cheers, Ken
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Friday, October 27th, 2017 AT 1:06 PM
Tiny
VINCE SCHIFANO
  • MEMBER
  • 2 POSTS
  • GMC YUKON
ON A 1998 SUBURBAN IS THERE MORE THAN ONE COMPUTER TO CHECK FOR CODES? CHECK ENGINE LIGHT ON DIM.
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Saturday, October 28th, 2017 AT 3:36 PM (Merged)
Tiny
LSUSSEL
  • MECHANIC
  • 252 POSTS
I belive there is only one.
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Saturday, October 28th, 2017 AT 3:36 PM (Merged)

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