1995 OBD1 Diag tool
Rennlist Member
Joined: Jul 2005
Posts: 168
Likes: 3
From: Ottawa, Ontario
Low voltage on K line 7?
Hi Ray,
this is a great post! I have a '95 993 and I've built your ciruit. I'm able to get status back on the pin 3 K line (climate control, ABS etc) but I'm not getting a response from the DME when I switch it over to the K line on pin 7. It never connects.
This tells me that everything in the circuit is working and the software is talking to COM1 ok etc etc. One thing I have noticed is that when I measure pin 7 of the OBD connector (I have the OBDII style on my car) without your circuit connected, it only measures around 6 volts and doesn't change (I've scoped it).
Is 6 volts normal for line 7 with nothing connected??
Thanks in advance......great job by the way!
Cheers,
Ron
this is a great post! I have a '95 993 and I've built your ciruit. I'm able to get status back on the pin 3 K line (climate control, ABS etc) but I'm not getting a response from the DME when I switch it over to the K line on pin 7. It never connects.
This tells me that everything in the circuit is working and the software is talking to COM1 ok etc etc. One thing I have noticed is that when I measure pin 7 of the OBD connector (I have the OBDII style on my car) without your circuit connected, it only measures around 6 volts and doesn't change (I've scoped it).
Is 6 volts normal for line 7 with nothing connected??
Thanks in advance......great job by the way!
Cheers,
Ron
Burning Brakes
Joined: May 2001
Posts: 1,107
Likes: 6
From: Reno, NV
I am really struggling to understand this thread but it still has me very excited.
If we (OBD I owners) can effectively create a PC based replacement for the Bosch Hammer life would be absolutely grand!
I'm going to sit back and wait for someone to explain what it is you guys have done (pictures usually help) in layman's terms.
Keep us posted!
If we (OBD I owners) can effectively create a PC based replacement for the Bosch Hammer life would be absolutely grand!
I'm going to sit back and wait for someone to explain what it is you guys have done (pictures usually help) in layman's terms.
Keep us posted!
Advanced
Joined: Apr 2006
Posts: 70
Likes: 0
From: unknown, usa
My question is where do we get the OBD connector? I have electronics knowledge so that isn't a problem. In fact I've built three Wide Band O2 sensor controllers from nothing.
Anyways I'm interested in building the circuit just need to find the connector.
Thanks.
Anyways I'm interested in building the circuit just need to find the connector.
Thanks.
Instructor
Joined: Jun 2003
Posts: 155
Likes: 1
From: uk
I believe andy sells the later obd2 connector which fits on my 95 RoW - http://www.andywhittaker.com/ecu/ecu_software.htm or http://www.ecufix.com/shop/ as well as a ready made board which is the one I use. Not sure if it's this connector or the round one you're after. I believe the 964 group was looking into the round connector.
BR, Mark.
BR, Mark.
Instructor
Joined: Nov 2001
Posts: 157
Likes: 11
From: Santa Barbara, CA
Originally Posted by Porscheologist
Raycm this looks like it might be very helpful to us 95 guys. A Bosch Hammer is impossible to find and very expensive. Keep us posted on your progress.
Good work!!!
Good work!!!
Cheers,
Ingo
Technical Guru
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Joined: May 2002
Posts: 8,138
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From: USVI
Originally Posted by PCar SBA
First I had to build a diagnostics port. A stock car has a 19-pin AMP socket. The matching connectors where made by AMP as a Porsche special. They are NLA
Porsche still sells the 19-pin connector for the hammer, the PCNA warehouse in Atlanta has them in stock (or did last month).
000-721-928-81 $335.93 (KTS300) Atlanta
000-721-958-81 $125.59 (PST2) 3 in Germany only, month away
000-721-971-81 $189.41 (PIWIS) Atlanta
the connector for the car side is also available, I haven't checked the ROM module availability in the past year so I'm not sure on that one...
Last edited by JasonAndreas; May 29, 2006 at 04:07 AM. Reason: added dollar signs to the prices
Instructor
Joined: Nov 2001
Posts: 157
Likes: 11
From: Santa Barbara, CA
Jason, are you talking about the AMP connector or an entire cable? The cable should have a 19-pin on one side (car)and a 9-pin on the other side (Hammer). The 9-pin is a standard AMP part that is still available.
Cheers,
Ingo
Cheers,
Ingo
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Technical Guru
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Joined: May 2002
Posts: 8,138
Likes: 122
From: USVI
Originally Posted by PCar SBA
Jason, are you talking about the AMP connector or an entire cable?
Technical Guru
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Joined: May 2002
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From: USVI
Originally Posted by PCar SBA
Aha, any idea on pricing.
Originally Posted by PCar SBA
Could I walk up to any Porsche dealer with the above part numbers to order one of the three?
Instructor
Joined: Jun 2003
Posts: 155
Likes: 1
From: uk
hidden,
I believe Andy's price for the just the connector, assuming you make up the interface board and wire it out as per ray's schematic is around £5 ~ $8 + p&p or something around that value. The diagnostic software as per thread doesn't need the hammer interface cable although I'm sure ready made cables can be sourced.
BR, Mark.
I believe Andy's price for the just the connector, assuming you make up the interface board and wire it out as per ray's schematic is around £5 ~ $8 + p&p or something around that value. The diagnostic software as per thread doesn't need the hammer interface cable although I'm sure ready made cables can be sourced.
BR, Mark.
Racer
Joined: Nov 2003
Posts: 424
Likes: 4
SUCCESS!
I just reset the airbag light using raycm's circuit and Doug's scantool software! A big thanks to both of you guys for your work.
My car is an early 993 (build date 9/94). I haven't had time to play with it too much, but code resets and realtime values like TPS appear to work fine.
Here are a few pictures - avert your eyes if you disapprove of ghetto circuitry.
My car is an early 993 (build date 9/94). I haven't had time to play with it too much, but code resets and realtime values like TPS appear to work fine.
Here are a few pictures - avert your eyes if you disapprove of ghetto circuitry.
Racer
Joined: Nov 2003
Posts: 424
Likes: 4
Originally Posted by tj90
COWTOWN: Are you manually plugging in each red wire into your OBD plug?
I have the OBD plug on order but couldn't wait to turn off that @!#$# airbag light. Replacing the clock caused the trouble code in the first place.
Now another question - It looks like I have the OBDII connector, even though I have an early early '95. What's going on here?