Diagnostic Port Troubles
Thread Starter
Le Mans Master
Joined: Sep 2009
Posts: 6,343
Likes: 1,149
From: Vermilion OH
Diagnostic Port Troubles
Hooking up a scanner to read my check engine light on my 94 6 spd revealed an odd issue. The scanner is stating that it cannot connect. The ALDL is powering the scanner so I believe it has power. The cigar fuse is good. Here is a picture of the ALDL. Any advice would be helpful:
Team Owner
Joined: Sep 2003
Posts: 25,413
Likes: 2,745
I believe that the DLC pin#16 is powered by the RH CTSY fuse #36. Do you have both "foot-well" lamps and courtesy lamps?
Check pin #16 should be orange for 12V.
What brand scanner? Does it work on a different car? Have you tried on another car? Can you?
Check pin #16 should be orange for 12V.
What brand scanner? Does it work on a different car? Have you tried on another car? Can you?
Last edited by WVZR-1; Dec 27, 2014 at 05:30 PM.
Team Owner
Joined: Dec 2012
Posts: 30,427
Likes: 1,609
From: Outside the Quick Stop N.J.
Is the scanner compatible with both OBD I and II ? Have you used that same scanner on your car before ? Even though that is an OBD II connector the 94 used OBD I. As suggested before, try the scanner on another car and see if it works.
Thread Starter
Le Mans Master
Joined: Sep 2009
Posts: 6,343
Likes: 1,149
From: Vermilion OH
The scanner works fine on other cars. I have tried more than one scanner on this car, to include taking the car to the dealer and having them try. Same results there as well.
Team Owner
Joined: Sep 2003
Posts: 25,413
Likes: 2,745
If it's a C68 car does the information display properly when using it? Using the DIC can you access the CCM information?
http://tech.corvettecentral.com/2011...trouble-codes/
If the information isn't available from the DIC or the C68 panel then I'd think there are maybe CCM issues. Do the various DIC functions at "key-on" work?
From your snapshot the proper pins seem to be populated so I guess the next order of business would be confirming the proper "wire colors" are in the proper ports. I'm assuming that you for sure have a FSM to confirm that. 8A-50-1
http://tech.corvettecentral.com/2011...trouble-codes/
If the information isn't available from the DIC or the C68 panel then I'd think there are maybe CCM issues. Do the various DIC functions at "key-on" work?
From your snapshot the proper pins seem to be populated so I guess the next order of business would be confirming the proper "wire colors" are in the proper ports. I'm assuming that you for sure have a FSM to confirm that. 8A-50-1
Last edited by WVZR-1; Dec 28, 2014 at 11:11 AM.
Le Mans Master
Joined: Jun 2009
Posts: 6,528
Likes: 752
From: South Dakota
Most scanners are only OBD2 and will not work on the '94-'95 Corvettes even though they have an OBD2 connector. They are OBD1 cars.
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