You'll need more than just a cable and some software for the PC. The
OBD interface is *not* RS-232 so it cannot be cabled directly to a com
port on a PC.
I an bought an OBD2 package from a company called Harrison R&D (no
I have never seen one for OBD1. I belive that this is because it was
not standardized and each manufacturer had its own implementation of
The software I have connects via a serial port on comm1, the connecting lead
is actually 2 leads, one has the connector from the obd port to a serial
connector, the other has a black box half way along its length and connects
the first lead to the conputer's serial port.
Inside the black box is where the magic takes place, to allow the car and
computer to communicate. Mine is sealed, so no intentions to open it up to
see what the circuitry is, but it definitely works, tested on my 2001 330dSE
and a friends 1998 318ti.
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