raycm

My 1995 has the OBD 2 connector.
I made an interface circuit, along with the ScanTool 3 software for the 964 I can communicate
with my Motronic. I had to change the Motronic baudrate setting to 9600.
I haven't gotten the ABS, Airbag or Climate Control to respond.

Ray

tj90

Is the interface circuit basically the PCB with the ELM controller? Many are available, did you have to build your own or was it specific to the 964?

How do you check the Motronic version on the car?

JasonAndreas

The 993 has dual k-lines and only the Motronic ECU responds on the first line, everything else responds on the second line.

Red rooster

CP,
RUF use a standard Motronic ECU with their own maps. Diagnostics are unchanged.

Geoff

CP

Thanks for the info. I asked because ViperBob could not read the codes off my ECU with his lap-top reader (he has the right cable). Whereas CT Automotive, with their full Porsche diagnostic set-up, could read them.

I would love to have a home code reader that reads my ECU, but I can't try them out as stores don't refund them once I buy.

CP

raycm

Is the interface circuit basically the PCB with the ELM controller? Many are available, did you have to build your own or was it specific to the 964?

How do you check the Motronic version on the car?
tj90
------------------------------------------------------------------
I'll publish my stuff in a new thread. I designed and built my interface.
I don't have any experience with Motronic or OBD. I used the 964 software and
hoped it was very close to 1995 993. Then used an oscilliscope to figure out the
baud rate was wrong.

Ray

993Porsche

Not sure if this one will work on our cars, but take a look anyway:

http://www.popularmechanics.com/auto...tml?page=1&c=y

mhm993

Re the earlier message about what to do with the tape holder thing, you can replace the tapeholder with a nice little bowl shaped replacement. The dealer has it for a few bucks--might be the cheapest thing on the car. It's got a 964 part number.

rattlsnak

my early 95 is OBDII as well.

FotoVeloce

FWIW my '95 had the ODB II connector. My '90 has the big round multi-pin.

Speaking of connectors. Would this cable work with the '95 ODB connector?

http://www.obd2cables.com/products/p...8763c6dc9cf5ec

If so I have the PCB board built from the 964 thread and I'll make one cable for the '64 and another for the '93.

I went pretty geek with mine kit....

X2Board

Resell them on E-Bay, people will buy anything, sometimes for more than it's worth

Scarabsport

May '95 build date, rectangular/OBD2. Interested.

GabiOsz

March 1995 delivery date, and mine has the OBD2 "isosceles trapezoid" connector.

95 C4 993

I have no idea but my car starts all the time and runs well.

brucec59

This is a really old thread.