THERE IS NO B TERMINAL

  • Tiny
  • smedly
  • 1994 Chevrolet Beretta
  • 160,000 miles

What code reader can I use for a 94 gm that uses only the a and m pins on the data link. There is no b terminal. Not all obd 1 readers work on 94 or 95 gm

Wednesday, January 18th, 2012 AT 5:40 PM

30 Answers

  • Tiny
  • smedly
  • Member

A and m pins only on data link

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Wednesday, January 18th, 2012 AT 5:40 PM
  • Tiny
  • saturntech9
  • Expert
  • 28,246 posts

So do you have a 12 pin or 16 pin connector?

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Wednesday, January 18th, 2012 AT 5:47 PM
  • Tiny
  • smedly
  • Member

12 pin but it only has wires to a and m pins, does not use a and b

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Wednesday, January 18th, 2012 AT 5:58 PM
  • Tiny
  • cadieman
  • Expert
  • 3,785 posts

U can buy key tools that plug in. Then you read the flashing light on the dash for codes. Recheck the connector because a and b are the right wires. Just buy a test key and plug it in. Ty for using 2carpros

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Wednesday, January 18th, 2012 AT 6:26 PM
  • Tiny
  • saturntech9
  • Expert
  • 28,246 posts

In your case you cant flash the codes. What code reader do you have?

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Wednesday, January 18th, 2012 AT 6:28 PM
  • Tiny
  • saturntech9
  • Expert
  • 28,246 posts

Read above there is no b terminal so you cant flash the codes it needs a scan tool.

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Wednesday, January 18th, 2012 AT 6:32 PM
  • Tiny
  • smedly
  • Member

I have the equis 3120 that does not work in this case. I am told I need a powered reader

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Wednesday, January 18th, 2012 AT 6:37 PM
  • Tiny
  • smedly
  • Member

Do I have the only 94 chev with this type of data connection?
What type scan tool do I need?

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Wednesday, January 18th, 2012 AT 6:49 PM
  • Tiny
  • saturntech9
  • Expert
  • 28,246 posts

Thats crazy it didnt come with a cig lighter adapter?Or have a battery inside the scanner?All the obd1 cars I know of dont power the scan tool off the connector. Iam not familar with the equis scanner I have the actron scanner with the obd1 domestic connectors it came with a cig lighter adapter to power it plus it has a 9V inside of it.

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Wednesday, January 18th, 2012 AT 6:52 PM
  • Tiny
  • saturntech9
  • Expert
  • 28,246 posts

They had the newer 12 pin connectors with and without that pin. The ones with that pin you could use a jumper and flash the codes out. Without that pin you have to use a scan tool to read codes.

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Wednesday, January 18th, 2012 AT 6:56 PM

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