Once you've hacked everything, why not go out in the garage and hack your car? This cable allows you to access the pins on your car's OBDII connector. It has an OBDII connector on one end and a DB9 female serial connector on the other. The overall length of the cable is 40".

Note: This cable is not meant to be plugged directly into a computer's serial port. It is meant to plug into some sort of hardware interface.

Here is the basic pinout (OBDII > DB9 Female)
Pin DescriptionOBDIIDB9
2:7 J1850 BUS+
4:2 Chassis Ground
5:1 Signal Ground
6:3 CAN High J-2284
7:4 ISO 9141-2 K Line
10:6 J1850 BUS-
14:5 CAN Low J-2284
15:8 ISO 9141-2 L Line
16:9 Battery Power

Feature:
Brand new and high quality OBD2 to DB9 serial port adapter cable
For connecting your diagnostic interface and your vehicle with OBD II compliant
Length: About 100cm
OBDII Plug: 16-pin male to car
9-pin DB9 female to your diagnostic interface

Could This Connector Be Used on My Vehicle?
This adapter cable is compatible with all OBD II compliant vehicles.
All 1996 and newer vehicles (cars and light trucks) sold in the United States must be OBD II compliant and this includes all domestic, Asian and European vehicles.
A few of 1994 and 1995 model year gasoline vehicles are OBD II compliant.

Package included:
1x 1M DB2 to 16 Pin Male OBDII cable adapter