The OBDII socket is a 16way connector usually found just below the car's dashboard near the steering wheel.
OBDII socket viewed from the front
Pinout
Pin no | Function |
4 | Chassis ground |
5 | Signal ground |
6 | CAN High |
7 | K-Line |
14 | CAN Low |
15 | L-Line |
16 | +12v |
OBDII to DB9 Cable
There seems to be two wiring configurations for the CAN-bus connection on the OBDII to DB9 cable.
Type 1.
As used in CAN-BUS analyser like Peak-Systems, Kvaser and Totalphase.
Type 2.