geldgrube

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

Leland Pate

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!

993_Pilot

I wish that I had enough computer / electronics knowledge to contribute, but for now I guess I'll continue to watch this thread and cheer you guys on.

hidden

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.

MPB993

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.

PCar SBA

The Bosch KTS 300 tools are not too hard to find. If anyone is interested in upgrading his Bosch KTS300 to the Porsche Version 9288/8.1 making it a real "Hammer" let me know. See here for how one works. http://forums.pelicanparts.com/showt...hreadid=282401
Cheers,
Ingo

JasonAndreas

Ingo,
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...

PCar SBA

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

JasonAndreas

The entire cable with the 19-pin and the 9-pin connectors (000-721-928-81). The other part numbers are the 19-pin connector cables for the PST2 and PIWIS (computer side connector is different).

PCar SBA

Aha, any idea on pricing. Could I walk up to any Porsche dealer with the above part numbers to order one of the three?

JasonAndreas

I had put the prices I was quoted (MSRP is probably a little more) with the part numbers above and I've just added dollar signs so that it doesn't look like a jumble of numbers.

Yes

MPB993

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.

cowtown

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.

tj90

COWTOWN: Are you manually plugging in each red wire into your OBD plug? If not, where are the red wires going? TJ

cowtown

For testing, yes, I put the leads directly into the plug. They aren't bare wires though- I soldered a piece of component lead onto each tip so it gets a good connection.

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?