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OBD connector

Tiny
DARRELL COATS
  • MEMBER
  • 1994 BUICK LESABRE
Shows check engine light. Need to pull codes, but has 16 pin connector but not obdi1 system.
Tuesday, May 1st, 2007 AT 3:30 PM

13 Replies

Tiny
TCCC143
  • MEMBER
  • 21 POSTS
Here is both the method for getting codes for OBD2 and OBD1

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

and

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

Please let us know if you need anything else to get the problem fixed.

Cheers
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Thursday, November 8th, 2007 AT 6:39 PM
Tiny
STEVE
  • MEMBER
  • 4 POSTS
  • 1994 BUICK LESABRE
  • 140,000 MILES
Jump 5 to 6 on diagnostic connector no flashes. Any suggestions?
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Monday, August 27th, 2018 AT 10:47 AM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
If that is a 16 pin datalink connector, a jumper wire won't work. At the least, you need an obd2 code reader, plugs into the datalink connector. Your local autostore should sell an obd2 code reader. Some national brand autostores will check codes for free.
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Monday, August 27th, 2018 AT 10:47 AM (Merged)
Tiny
STEVE
  • MEMBER
  • 4 POSTS
It is a 16 pin Ben to autozone and 2 other auto parts stores all scans come up no data connection
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Monday, August 27th, 2018 AT 10:47 AM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Pin 16 should be voltage, any voltage on that pin? If no voltage, the datalink connector wont work.

Are you having any driveability issues with vehicle?
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Monday, August 27th, 2018 AT 10:47 AM (Merged)
Tiny
STEVE
  • MEMBER
  • 4 POSTS
Yes the idols is up to 2500 rpm does at start up if I pull connectionconnection to IAc Idol drops down
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Monday, August 27th, 2018 AT 10:47 AM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Did you clean the throttle-body and idle air control? What about pin 16 on the datalink connector, use a testlite, any voltage?
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Monday, August 27th, 2018 AT 10:47 AM (Merged)
Tiny
SMMCFARLAND2
  • MEMBER
  • 1 POST
  • 1994 BUICK LESABRE
  • 3.3L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 235,000 MILES
This vehicle is OBD1 COMPLIANT, but it has an OBD2 connector. Is there a scanner I could buy for what has been suggested as obd1.5? How about jumping pins to get the mil to flash?

Thanks, Steve
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Monday, August 27th, 2018 AT 10:47 AM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Just to add, You can check resistance across A & B terminals, then C & D terminals, 40--80 ohms. If not as specified replace iac.

Check resistance between B & C, then A & D terminals, infinite resistance, If not replace iac.

It sounds to me like the iac is working correctly. With engine idling, block off the mouth of throttle-body, does it kill the engine?
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Monday, August 27th, 2018 AT 10:47 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
That is obd1 certified and it has a 16 pin connector that only 6 pins are used and it has the same shape as the obd2 connectors but obd2 code readers do not work.

that takes a special adapter and scanner is only way to read codes if it has 12 pins as it should cross A&B with paper clip watch engine light flash with key on count flashes.

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

Please let us know what you find.

Cheers
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Monday, August 27th, 2018 AT 10:47 AM (Merged)
Tiny
JESSE777
  • MEMBER
  • 37 POSTS
These take a unique scanner/software to read. They are partially OBD1 & OBD2, oddballs.

What problem are you having?
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Monday, August 27th, 2018 AT 10:47 AM (Merged)
Tiny
MARKHELLION
  • MEMBER
  • 2 POSTS
  • 1995 BUICK LESABRE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 98,570 MILES
Engine running rough, check engine light on, has an obd2 connector cannot hook up.
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Monday, August 27th, 2018 AT 10:47 AM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
You are in a transition year. You have an OBD2 connector but and OBD1 system. The only thing that will access that one is a professional scan tool.
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Monday, August 27th, 2018 AT 10:47 AM (Merged)

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