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TOPIC: Diagnostic Connector

Diagnostic Connector 09 Oct 2012 20:10 #11747


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We may be able to source some reasonably-priced 19-pin plugs for the diagnostic connector.

Anybody need any?
Wally Plumley
928 Specialists
www.928gt.com
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Diagnostic Connector 09 Oct 2012 21:30 #11749

Can you source both ends Wally?

Im interested in the 'Porsche' end to make adapter cables for the older cars with the rectangular diag port.
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Diagnostic Connector 10 Oct 2012 16:21 #11754


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Pardon my ignorance. What is a 19-pin plug for the diagnostic connector?
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Diagnostic Connector 10 Oct 2012 23:10 #11766

Porsche added diag software to the 88 MY and up. The 87/88 cars have a rectangular port near the LH and EZK computers although the 87 eproms do not have the diag software.

The 89 thru 95 cars were changed to have a 19 pin diag port near the LH drive passenger seat.

The eprom diag software is accessed through these ports with a special tool that became known as the 'hammer'. The Porsche hammer was superceeded by the JDS Spanner which in turn was upgraded to Theos diag system which is still availbale.
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Diagnostic Connector 11 Oct 2012 20:47 #11793


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After some discussion, David decided that it would be better to just let everyone who wants a connector buy their own from the supplier at minimum cost. The total cost is $8.95, including shipping.

http://www.ebay.com/itm/290715157056?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
Wally Plumley
928 Specialists
www.928gt.com
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Diagnostic Connector 18 Oct 2012 11:18 #11891


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ok, so once i have this plug, i where do i get the Dx tool to see whats going on in there? does the OC have one in their share/loan program?
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Diagnostic Connector 18 Oct 2012 12:10 #11892


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malcolm;12111 wrote:
Porsche added diag software to the 88 MY and up. The 87/88 cars have a rectangular port near the LH and EZK computers ...

Thanks for the explanation Malcolm. Follow-on questions: What type pf plug fits the rectangular port of an '88 and can an OBD be used?
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Diagnostic Connector 18 Oct 2012 19:53 #11898

your welcome Martin

I believe the rectangular port is a 12 pin device thats pictured in the WSM.....I'll look for it.



I understand the Porsche diag software cannot be communicated to with an OBD........recall the software was developed ~20 years ago now :)

Attached files
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Diagnostic Connector 19 Oct 2012 11:41 #11902


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Diagnostic results were disappointing. I attached the 19-pin adapter to the diagnostic connector on the '90 GT, and attached an OBD-II scanner. The scanner went thru all of the communication protocols, and gave the version of one of the protocols - but absolutely no other info. No codes, no data stream.

Perhaps some of our electronics experts might be able to help, but so far, it looks as if Porsche had no early implementation of any OBD standards.
Wally Plumley
928 Specialists
www.928gt.com
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